List of Titles

A review : plastic deformation through equal channel angular pressing

- Erinosho, Mutiu F., Akinlabi, Esther Titilayo

Authors: Erinosho, Mutiu F. , Akinlabi, Esther Titilayo
Date: 2016
Subjects: Microstructural evolution , Severe plastic deformation , Strain path
Language: English
Type: Conference proceedings
Identifier: http://hdl.handle.net/10210/92397 , uj:20225 , Citation: Erinosho, M.F. & Akinlabi, E.T. 2016. A review : plastic deformation through equal channel angular pressing.
Description: Abstract: In most manufacturing processes, objects of the required shape and size are produced through plastic deformation; sometimes by deforming the product itself through rolling, extrusion, drawing etc, and by deforming the metal removed through grinding, milling and cutting operation. In these processes, a load of appreciable magnitude is applied on the material subjected to deformation, and the plastic flow thus produced is suitably restricted to get the desired shape and size. Equal Channel Angular Pressing (ECAP) is very capable of producing ultrafine grained microstructures and improves the mechanical properties of the deformed materials. The variations in strain path directions during deformation have significantly effect on the physical and mechanical response of distorted metals.
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A review article: the mechanical properties and the microstructural behaviour of laser metal deposited Ti-6Al-4V and TiC composite

- Erinosho, Mutiu, F., Akinlabi, Esther Titilayo

Authors: Erinosho, Mutiu, F. , Akinlabi, Esther Titilayo
Date: 2016
Subjects: Application , Laser technology , Mechanical properties
Language: English
Type: Conference proceedings
Identifier: http://hdl.handle.net/10210/121859 , uj:20573 , Citation: Erinosho, M.F. & Akinlabi, E.T. 2016. A review article: the mechanical properties and the microstructural behaviour of laser metal deposited Ti-6Al-4V and TiC composite.
Description: Abstract: Please refer to full text to view abstract
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A review of solar thermal systems utilization for industrial process heat applications

- Michael, Mathias B., Akinlabi, Esther Titilayo, Jen, Tien-Chien

Authors: Michael, Mathias B. , Akinlabi, Esther Titilayo , Jen, Tien-Chien
Date: 2016
Subjects: Solar thermal , Industrial process heat , Collector analysis
Language: English
Type: Conference proceedings
Identifier: http://hdl.handle.net/10210/214404 , uj:21277 , Citation: Michael, M.B., Akinlabi, E.T & Jen, T-C. 2016. A review of solar thermal systems utilization for industrial process heat applications.
Description: Abstract: This paper presents a literature review on Solar thermal systems for commercial and industrial application. The growth of solar thermal system for industrial use is slow as compare to that of residential application due to the higher level of temperature required for industrial process and the systems low efficiency. A number of research works on the development of solar thermal systems is discussed. The aim of this review is to identify the research trend of solar thermal systems for industrial applications. The review indicates that, there is a significant research development on the solar thermal but mainly focus on electricity generation but not for low and medium temperature industrial heat processes. The identified this research gap and recommends that, future research must focus on the low and medium temperature industrial applications.
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A review on factors affecting municipal solid waste generation

- Masebinu, S. O., Akinlabi, Esther Titilayo, Muzenda, E., Aboyade, A. O., Mbohwa, Charles, Manyuchi, M., Naidoo, P.

Authors: Masebinu, S. O. , Akinlabi, Esther Titilayo , Muzenda, E. , Aboyade, A. O. , Mbohwa, Charles , Manyuchi, M. , Naidoo, P.
Date: 2017
Subjects: Municipal solid waste , Waste quantity , Waste generation factors
Language: English
Type: Conference proceedings
Identifier: http://hdl.handle.net/10210/250378 , uj:26089 , Citation: Masebinu, S.O. et al. 2017. A review on factors affecting municipal solid waste generation. 2nd International Engineering Conference (IEC 2017) Federal University of Technology, Minna, Nigeria.
Description: Abstract: Municipal solid waste (MSW) management is not a one-off planning, it is a dynamic evolution and planning has to cater for it. The quantity of MSW generated and composition form the basis for planning and management of MSW. However, for an effective MSW reduction policy to be implemented, generated quantity of MSW is not sufficient alone for policy implementation but more of the variables affecting the generation rate and composition are critical. Without an in-depth understanding of these variables, waste reduction policies may be ineffective and unsuccessful. In this study, we reviewed the impact of these factors on MSW. A case of the City of Johannesburg (CoJ) was studied. Population and gross domestic product (GDP) are the two compelling factors affecting MSW generation. The waste generation per capita is influenced by income level. High income group generate on average 1.91 kg/capita/day, middle income group generates 1.01 kg/capita/day and low income group 0.92 kg/capita/day. This put the CoJ total waste generated at an average of 1.83 million ton/year.
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A streamlined life cycle assessment of a coal-fired power plant- the South African case study

- Dunmade, Israel, Madushele, Nkosinathi, Adedeji, Paul A., Akinlabi, Esther Titilayo

Authors: Dunmade, Israel , Madushele, Nkosinathi , Adedeji, Paul A. , Akinlabi, Esther Titilayo
Date: 2019
Subjects: Coal cycle, Coal-fired power plant, Environmental sustainability
Language: English
Type: Article
Identifier: http://hdl.handle.net/10210/396624 , uj:32939 , Citation : Dunmade, I. et al. 2019. A streamlined life cycle assessment of a coal-fired power plant- the South African case study
Description: Abstract : Non-renewable energy sources have detrimental environmental effects, which directly and indirectly affect the biosphere as environmental deposits from their use for energy generation exceed a threshold. This study performs a streamlined lifecycle assessment (LCA) of a coal-fired plant in South Africa. The cradle-to-grave LCA focuses on the coal cycle to determine hotspots with high environmental impacts in the process. Four impact categories were considered in this study; global warming potential, photochemical ozone creation potential, eutrophication potential, and acidification potential. Coal transportation, coal pulverization, water use, and ash management were identified as hotspots in the coal cycle. The coal process has 95% potential for global warming, 4% potential for eutrophication, 1% potential for acidification and a negligible percentage for photochemical ozone creation. Susceptibility to climate change, eutrophication, acid rain, soil degradation and water contamination among others are major concerns of the coal cycle. Outsourcing coal from nearby mines with train as medium of transportation reduces environmental impact. Similarly, the use mitigation technologies like flue gas desulphurization, carbon capture storage or selective catalytic reduction will reduce concentration of flue gas emitted. Ultimately, substituting the coal process with renewable energy sources will ensure environmental sustainability in South Africa. This study will serve as a good resource for further studies on LCA of coal power plants not only in other African countries but in other developing countries with similar situation.
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Accessing the global engineering market through diversification of the Ghanaian Textile Industry

- Anane-Fenin, K., Akinlabi, Esther Titilayo

Authors: Anane-Fenin, K. , Akinlabi, Esther Titilayo
Date: 2016
Subjects: Composites , Non-crimp fabrics , Resin transfer moulding, , Textile industry - Ghana
Language: English
Type: Conference proceedings
Identifier: http://hdl.handle.net/10210/92320 , uj:20216 , Citation: Anane-Fenin, K. & Akinlabi, E.T. 2016. Accessing the global engineering market through diversification of the Ghanaian Textile Industry.
Description: Abstract: Please refer to full text to view abstract.
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Additive manufacturing : the future of manufacturing

- Adekanye, Adefemi, Mahamood, Rasheedat M., Akinlabi, Esther Titilayo, Owolabi, Moses G.

Authors: Adekanye, Adefemi , Mahamood, Rasheedat M. , Akinlabi, Esther Titilayo , Owolabi, Moses G.
Date: 2017
Subjects: Additive manufacturing , Fused deposition modelling , Laser metal deposition
Language: English
Type: Article
Identifier: http://hdl.handle.net/10210/248998 , uj:25901 , Citation: Adekanye, A. et al. 2017. Additive manufacturing : the future of manufacturing.
Description: Abstract: Additive manufacturing process is an advanced manufacturing method that is used to fabricate prototypes, tooling, as well as functional product. Additive manufacturing process can produce complex part as a single unit object that was not possible with the traditional manufacturing methods. There are different types of additive manufacturing technologies which include selective laser melting, laser metal deposition process, fused deposition modelling and electron beam melting. All these additive manufacturing technologies produce three dimensional (3D) objects by adding materials layer after layer. The 3D object is built directly from the 3D computer aided design (CAD) model of the object. Additive manufacturing is a very promising manufacturing method for the aerospace industry in particular because of its ability to reduce buyto- fly ratio. This technology is the technology of the future because it is going to change the way products are designed and manufactured. In this research, various additive manufacturing technologies are described in detail and some of the research works in this field are also presented. The future research directions are also highlighted.
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Advanced coating: laser metal deposition of aluminium powder on titanium substrate

- Akinlabi, Esther Titilayo, Akinlabi, Stephen A.

Authors: Akinlabi, Esther Titilayo , Akinlabi, Stephen A.
Date: 2016
Subjects: Heat affected zone , Laser metal deposition , Powder metallurgy
Language: English
Type: Conference proceedings
Identifier: http://hdl.handle.net/10210/93266 , uj:20325 , Citation: Akinlabi, E.T. & Akinlabi, S.A. 2016. Advanced coating: laser metal deposition of aluminium powder on titanium substrate.
Description: Abstract: Laser Metal Deposition (LMD) is an additive manufacturing technique, which can be used to produce solid components from a Computer Aided Design (CAD) model. The LMD process makes use of feeding powder, which is supported by the shielding gas, into the melt pool that is produced by sharply focused collimated laser beam on the substrate. This study employs aluminium powder in its molten state on titanium substrate through the LMD process. The aluminium powder was deposited at varying laser scanning speeds while the laser power and gas flow rate were kept constant. The presence of alpha phase grains were observed in the microstructures of samples at a lower scanning speed and the beta phase grains at a higher laser scanning speed. It was found that the geometrical properties of the deposits, that is; the width, height and the Heat Affected Zone (HAZ) of each sample decreased as the scan speed increases resulting from the laser-material interaction. The microhardness and the corrosion rates of each sample increased as the laser scanning speed increases.
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Advanced manufacture of compositionally composite graded materials : an overview

- Mahamood, R.M., Akinlabi, Esther Titilayo, Abdulrahman, K.O., Owolabi, M.G.

Authors: Mahamood, R.M. , Akinlabi, Esther Titilayo , Abdulrahman, K.O. , Owolabi, M.G.
Date: 2018
Subjects: Additive manufacturing , Functionally graded materials , Selective laser melting
Language: English
Type: Book Chapter
Identifier: http://hdl.handle.net/10210/291077 , uj:31601 , Citation: Mahamood, R.M., Akinlabi, E.T. & Abdulrahman, K.O. 2018. Advanced manufacture of compositionally composite graded materials : an overview.
Description: Abstract: Compositionally graded composite materials are advanced materials that consists of inhomogeneous composition as well as structure that varies across the entire volume and with changing properties. Functionally graded materials are produced through different manufacturing processes which include centrifugal method, powder metallurgy method, and additive manufacturing technology. Additive Manufacturing (AM) is an advanced manufacturing process used to produce three dimensional objects simply by adding materials in layers using the digital image of the component. In this chapter, the production of compositionally graded composite materials using an advanced manufacturing method, laser additive manufacturing technologies, which include selective laser melting/sintering and laser metal deposition/laser material deposition (LMD) processes are reviewed and the recent research progress are also presented.
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Anaerobic digestion for sustainable energy : a brief review

- Kumba, Tresor K., Akinlabi, Esther Titilayo, Madyira, Daniel M.

Authors: Kumba, Tresor K. , Akinlabi, Esther Titilayo , Madyira, Daniel M.
Date: 2016
Subjects: Anaerobic digestion , Renewable energy , Economic development
Language: English
Type: Conference proceedings
Identifier: http://hdl.handle.net/10210/214386 , uj:21274 , Citation: Kumba, T.K., Akinlabi, E.T & Madyira, D.M. 2016. Anaerobic digestion for sustainable energy - a brief review.
Description: Abstract: This paper presents a review on different aspects influencing the development of household anaerobic digesters. Biogas technology has recently been considered as one of the few most promising renewable and sustainable energies. However, there exists certain challenges to household digester’s dissemination. Some of these challenges are very critical to the appreciation of anaerobic digestion processes as well as systems. The type of waste, feeding regime, temperature, pressure, retention time, hydrogen ion concentration and the carbon-tonitrogen ratio are considered to be very important factors for optimum anaerobic digestion processes. The plant sustainability and the quality of anaerobic digestion bi-products are also considered very important during design and implementation stages.
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Analysis of the influence of the laser power on the microstructure and properties of titanium alloy - reinforced boron carbide matrix composite (Ti6Al4V-B4C)

- Ogunlana, Musibau O., Akinlabi, Esther Titilayo, Erinosho, Mutiu F.

Authors: Ogunlana, Musibau O. , Akinlabi, Esther Titilayo , Erinosho, Mutiu F.
Date: 2018
Subjects: Dry sliding wear , LMD , Microhardness
Language: English
Type: Article
Identifier: http://hdl.handle.net/10210/289888 , uj:31461 , Citation: Ogunlana, M.O., Akinlabi, E.T. & Erinosho, M. 2018. Analysis of the influence of the laser power on the microstructure and properties of titanium alloy - reinforced boron carbide matrix composite (Ti6Al4V-B4C).
Description: Abstract: Laser Metal Deposition (LMD) process is a means of producing metal composites with the aid of laser beam being ejected onto the substrate with the participating powder and fused together after solidification. In this research work, Ti6Al4V alloy is fused with 20 wt % of B4C in order to form metal matrix composites (MMCs). Using the Ytterbium Fibre Laser System powdered at 3000 W, the laser powers were varied between 800 W and 2400 W while all other supporting process parameters were kept constant. The deposited Ti6Al4V-B4C composites were characterized through the surfacing microstructure, microhardness and dry sliding wear. The microstructural properties of the deposited samples were profound with Widmanstätten structure of α-Ti, β-Ti and (α+β) Ti phases. The microhardness tests revealed that the composites deposited with a laser power of 2000 W exhibited the highest hardness value and standard deviation of HV 445 ± 61. Furthermore characterisation revealed that, the sample produced with the laser power of 800 W had the lowest wear loss and wear rate of 35.2 x 10-3 mm3 and 6.42 x 10-4 mm3/Nm. However, the motivation for this work is to improve the material properties of Ti6Al4V alloy for surface engineering applications.
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Atomic force microscopy analysis of surface topography of pure thin aluminium films

- Mwema, F.M., Oladijo, O.P., Sathiaraj, T.S., Akinlabi, Esther Titilayo

Authors: Mwema, F.M. , Oladijo, O.P. , Sathiaraj, T.S. , Akinlabi, Esther Titilayo
Date: 2018
Subjects: Atomic Force Microscopy , Magnetron sputtering , Power Spectral Density
Language: English
Type: Article
Identifier: http://hdl.handle.net/10210/290690 , uj:31561 , Citation: Mwema, F.M. et al. 2018. Atomic force microscopy analysis of surface topography of pure thin aluminium films.
Description: Abstract: Pure aluminium thin films were deposited on stainless and mild steel substrates through rf magnetron sputtering at rf powers of 150 and 200 W. Surface analysis of the films was undertaken using atomic force microscopy. The surface structure evolution, roughness and distribution were examined and discussed. Power spectral density, skewness and Kurtosis parameters were used to explain the nature and distribution of the surface structures on the thin aluminium films as reported from the line profile analyses. The result shows that the morphologies of the surface structures of Al films vary with power and substrate type. The coatings exhibit the higher roughness at 200 W. There is strong links that exist between AFM observations and SEM. This implies that AFM can be considerably used to study the microstructural evolution of Al thin films during magnetron sputtering.
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Barriers in implementing green supply chain management in construction industry

- Ojo, Elizabeth, Mbowa, Charles, Akinlabi, Esther Titilayo

Authors: Ojo, Elizabeth , Mbowa, Charles , Akinlabi, Esther Titilayo
Date: 2014
Subjects: Green supply chain management , Construction industry - Nigeria
Type: Article
Identifier: uj:5012 , http://hdl.handle.net/10210/13152
Description: Green supply chain management (GSCM) has become an antidote for sustainability in an industry. Despite the benefits of GSCM, there is a paucity of research investigated drivers and barriers of GSCM in Nigerian construction industry. Cost reduction, brand image development and gaining a competitive advantage were the main drivers which encouraged corporate to adopt GSCM practices. Lack of resources, supplier resistance to change and lack of awareness were found to be the main barriers militating against adoption of GSCM practices. This research is intending to identify drivers and barriers of GSCM practices adoption in Nigerian Construction firms. Using qualitative approach, 28 participants from both public and private constructions firms have been investigated through a questionnaire . The research depended on descriptive analysis to conclude results. Research analysis indicated that lack of public awareness, Lack of knowledge and environmental impacts, Poor commitment by the top management and Lack of legal enforcement and Government represented the main barriers facing adoption of GSCM practices in Nigerian construction firms. This research gives ways to firms seeking GSCM practices adoption in Nigerian construction firms.
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Behaviour of laser metal deposited Ti6Al4V/Cu composites in hank’s solution for biocompatibility properties

- Erinosho, Mutiu F., Akinlabi, Esther Titilayo, Pityana, Sisa

Authors: Erinosho, Mutiu F. , Akinlabi, Esther Titilayo , Pityana, Sisa
Date: 2016
Subjects: Hank’s solution , Laser metal deposition , Microhardness
Language: English
Type: Article
Identifier: http://hdl.handle.net/10210/215427 , uj:21416 , Citation: Erinosho, M.F., Akinlabi, E.T & Pityana, S. 2016. Behaviour of laser metal deposited Ti6Al4V/Cu composites in hank’s solution for biocompatibility properties.
Description: Abstract: Ti6Al4V alloy is a well-known material for biomedical application due to the very excellent corrosion resistance it possessed. Copper is an excellent antimicrobial property and has been found to stabilize the immune system of the body activities. In this present study, laser metal deposition of Ti6Al4V/Cu composites have been conducted by varying the laser power between 600 W and 1800 W while the scanning speed of 0.005 m/s and other process parameters as depicted in the experimental matrix were kept constant. Widmanstettan structures were observed in all the samples at high magnification and lose their coarseness as the laser power increases. The microhardness values of the deposited composites were varied between HV335 ± 27 μm and HV490 ± 73 μm. The surface behaviour and the morphologies of the composites were evaluated under the SEM after soaking for 2 weeks. The simulated body fluid (hank’s solution) was maintained at normal body temperature of about 37±1oC. The surfaces showed fracture topography with porous bone-like and snowflake structures.
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Bioceramic hydroxyapatite coating fabricated on TI-6AL-4V using Nd:YAG laser

- Tlotleng, M., Akinlabi, Esther Titilayo, Shukla, M., Pityana, S., Mathebula, T., Chauke, L.

Authors: Tlotleng, M. , Akinlabi, Esther Titilayo , Shukla, M. , Pityana, S. , Mathebula, T. , Chauke, L.
Date: 2014
Subjects: Bioceramic hydroxyapatite coating , Nd:YAG laser
Type: Article
Identifier: uj:5015 , ISSN 978-0-7972-1532-0 , http://hdl.handle.net/10210/13155
Description: A method of synthesising a biocompatible HAP coating is presented. In the current study, Nd:YAG laser was used to directly melt pre-place HAP powder beds on Ti-6Al-4V. The processing parameters used were 750 W laser power, 5 mm/s scanning speed and 27° inclined beam plane. The coating was studied under white light and scanning electron microscope where it was possible to characterise the microstructures. The produced coating was characterised of mixed morphologies of HAP, short and elongated titanium needles at the surface while in the middle of the coating dendrite trunks without arms were observed. This observation is related to the heat inputs, dilution and melting of the substrate and powder during processing. The absence of the arms growing from the trunks indicated low heat inputs. In addition, the microstructure of the HAP after soaking in Hanks’ solution indicated octagonal and hexagonal crystals of HAP. The hardness values indicated good metallurgical bonding at the interface. In conclusion, this study was successful in fabricating a desirable coating of HAP on Ti-6Al-4V for biomedical applications. This work highlights that even though laser power and scanning speed are predominantly influential parameter settings, it is also necessary to consider the angle at which the laser beam is scanned across the material.
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Biogas use as fuel in spark ignition engines

- Kukoyi, T.O., Muzenda, E., Akinlabi, Esther Titilayo, Mashamba, A., Mbohwa, Charles, Mahlatsi, T.

Authors: Kukoyi, T.O. , Muzenda, E. , Akinlabi, Esther Titilayo , Mashamba, A. , Mbohwa, Charles , Mahlatsi, T.
Date: 2016
Subjects: Biogas , Spark ignition engines , Substitute fuel
Language: English
Type: Conference proceedings
Identifier: http://hdl.handle.net/10210/217660 , uj:21667 , Citation: Kukoyi, T.O. et al. 2016. Biogas use as fuel in spark ignition engines.
Description: Abstract: This paper reviews the utilization of biogas in spark ignition engines with a view to making a case for it as an efficient substitute fuel for petrol. However, its gaseous nature which accounts for its low volumetric density implies that apart from the basic modification needed to accommodate the fuel, the engine might need further alterations to get the best from this relatively low cost and readily available fuel. Various modes of enhancing performance particularly methane enrichment, prechamber combustion, alteration of ignition parameters, increasing compression ratio and addition of hydrogen to improve performance and emissions were drawn from previous works to validate its efficiency as a viable substitute fuel in SI engines.
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Central composite design on volume of laser metal deposited Ti6Al4V and Cu

- Erinosho, Mutiu F., Akinlabi, Esther Titilayo

Authors: Erinosho, Mutiu F. , Akinlabi, Esther Titilayo
Date: 2017
Subjects: Laser metal deposition , Response surface methodology , Central composite design
Language: English
Type: Article
Identifier: http://hdl.handle.net/10210/236159 , uj:24162 , Citation: Erinosho, M.F. & Akinlabi, E.T. 2017. Central composite design on volume of laser metal deposited Ti6Al4V and Cu.
Description: Abstract: Laser technology process is a pulsating practice to the field of engineering and in all paces of lifespan; since it can travel a longer distance and be focused to a very small bright spot that exceeds the illumination of the sun. This present study reports the modeling and the prediction of the volume of laser deposited composites using the central composite design (CCD). Four input factors were put into consideration which is the laser power, the scanning speed, the powder flow rate and the gas flow rate. Titanium alloy (Ti6Al4V) and copper (Cu) have been coaxially deposited to form a bulk of single clad. The factors considered determine the energy density and the melt pool delivered into the substrate and as such, influenced the volume of the deposited composite (VDC) which was employed in the response surface methodology (RSM) design. This has been used to predict the actual process parameters for the optimum process setting.
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Characterising the brake blocks of a freight rail container wagon

- Akinlabi, Esther Titilayo, Sanusi, Kazeem O., Mamabolo, Masemenya

Authors: Akinlabi, Esther Titilayo , Sanusi, Kazeem O. , Mamabolo, Masemenya
Date: 2016
Subjects: Brakes block , Friction , Hardness test , Test , Wagon , Wear test , Microstructure
Language: English
Type: Conference proceedings
Identifier: http://hdl.handle.net/10210/93235 , uj:20320 , Citation: Akinlabi, E.T., Sanusi, K.O. & Mamabolo, M. 2016. Characterising the brake blocks of a freight rail container wagon.
Description: Abstract: Society has become dependent on trains to provide the means for freight and transport services and with so many people being dependent on these services safety must be taken as the utmost priority. The aim of this research project is to characterise the Brake block samples of a Freight Rail container wagon using tribological properties for the effect of friction and wear, hardness tests to investigate the mechanical property and microstructure analysis and material composition in different environmental conditions using Scanning Electron Microscopy (SEM), Energy Dispersive Spectrometry (EDS.
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Characterising the effect of laser metal deposited Ti6Al4V/Cu composites in simulated body fluid for biomedical application

- Erinosho, M. F., Akinlabi, Esther Titilayo, Pityana, S.

Authors: Erinosho, M. F. , Akinlabi, Esther Titilayo , Pityana, S.
Date: 2015-01-15
Subjects: Hank’s solution , Laser metal deposition , Surface morphologies , Titanium alloys
Type: Article
Identifier: uj:5120 , ISBN 9789384935108 , http://hdl.handle.net/10210/14078
Description: Ti6Al4V alloy has been known to have very excellent corrosion resistance due to the oxide layer formed on its surface. Due to this property, the alloy is found applicable for biomedical implants. Copper shows an excellent antimicrobial property and has been found to stabilize the immune system. In this study, laser metal deposition of Ti6Al4V powder and Cu powder on Ti6Al4V substrates were conducted by varying the laser power between 600 W and 1800 W while the scanning speed, the powder flow rate and the gas flow rate were kept constant. The surface behaviour and the morphologies of the composites were evaluated under the microscope and the SEM after soaking for 4 hours, 5 days and 2 weeks respectively. The simulated body fluid (hank’s solution) was maintained at normal body temperature of about 37±1oC. The surfaces showed fracture topography with porous bone-like structures and some trivial pitting were observed.
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Characterising the effect of laser power on laser metal deposited titanium alloy and boron carbide

- Erinosho, M. F., Akinlabi, Esther Titilayo

Authors: Erinosho, M. F. , Akinlabi, Esther Titilayo
Date: 2017
Subjects: Ti6Al4V-B4C composites , Laser metal deposition , Microstructure
Language: English
Type: Article
Identifier: http://hdl.handle.net/10210/241349 , uj:24845 , Citation: Erinosho, M.F. & Akinlabi, E.T. 2017. Characterising the effect of laser power on laser metal deposited titanium alloy and boron carbide.
Description: Abstract: Titanium alloy has gained acceptance in the aerospace, marine, chemical and other related industries due to its excellent combination of mechanical and corrosion properties. In order to augment its properties, a hard ceramic, boron carbide has been laser cladded with it at varying laser powers between 0.8 kW and 2.4 kW. This paper presents the effect of laser power on the laser deposited Ti6Al4V-B4C composites through the evolving microstructures and microhardness. The microstructures of the composites exhibit the formation of Î±-Ti phase and Î²-Ti phase and were elongated towards the heat affected zone. These phases were terminated at the fusion zone and globular microstructures were found growing epi! taxially just immediately after the fusion zone. Good bondings were formed in all the deposited composites. Sample A1 deposited at a laser power of 0.8 kW and scanning speed of 1 m/min exhibits the highest hardness of HV 432Â±27 while sample A4 deposited at a laser power of 2.0 kW and scanning speed of 1 m/min displays the lowest hardness of HV 360Â±18. From the hardness results obtained, ceramic B4C has improved the mechanical properties of the primary alloy.
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