Maximizing the pontential of waste heat for generation of environmental friendly energy
- Authors: Ayodele, Olukayode Lawrence , Sanusi, Kazeem Oladele , Kahn, MTE
- Date: 2016
- Subjects: Autonomous systems , Energy , Thermoelectric
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/216648 , uj:21534 , Citation: Ayodele, O.L., Sanusi, K.O & Kahn, M. 2016. Maximizing the pontential of waste heat for generation of environmental friendly energy.
- Description: Abstract: Autonomous systems source energy from waste heat which are generated by home appliances and industrial machineries and mitigate the effect of global warming which threatens the environment as a result of fossil fuel energy based sources that release undesirable carbon-monoxide into the atmosphere. This paper described current waste heat recovery practices in different applications, and an innovative approach to convert heat energy into usable forms. This can significantly contribute towards sustainable energy development and meet the growing need for power in small scale applications due to its relative advantages over other sources of energy generation. It will help in optimizing existing waste recovery technologies and developing new heat recovery technologies and gives an insight into various ways by which waste heat can be exploited to meet the growing energy demand and increasing interest in space exploration, satellite activities, structural health monitoring and terrestrial monitoring in harsh and inaccessible environments place a high demand for energy sources for autonomous systems.
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The influence of scanning speed and number of scans on the properties of laser formed steel
- Authors: Sanusi, Kazeem Oladele , Akinlabi, Stephen , Akinlabi, Esther Titilayo
- Date: 2016
- Subjects: Laser beam forming , Scanning speed , Laser power , Mechanical , Microstructure , Micro hardness , Number of scan
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/93743 , uj:20385 , Citation: Sanusi, K.O., Akinlabi, S. & Akinlabi, E.T. 2016. The influence of scanning speed and number of scans on the properties of laser formed steel.
- Description: Abstract: Laser Beam Forming (LBF) process is an emerging and new forming method that generally requires brute force to forge the steel into the desired shape instead of using conventional methods. This study investigates the changes that occur in low carbon steel through the laser beam forming process. The parameters under investigation include variable scanning speed and number of scans at fixed laser intensity. The effect of these laser parameters on the chemical composition and properties of low carbon steel is assessed through characterisation of both the as received and LBF formed specimens. Characterizations of the laser formed steels were studied using microstructural analysis and micro hardness profiling. The results show that there is a significant increase in the mechanical properties of the LBF formed materials. Scanning power and the number of scans have a noticeable effect on the curvature achieved in the formed samples.The results obtained will contribute towards the further optimization of laser forming methods for steel for the optimization of the properties of steel using Laser Beam Forming process.
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The mechanical behaviours of polyurethanes hybrid polymer composites embedded with Nickel- Titanium (NiTi) shape memory alloys
- Authors: Sanusi, Kazeem Oladele , Ayodele, Olukayode Lawrence
- Date: 2016
- Subjects: Shape memory alloys , Composite , smart materials
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/216641 , uj:21533 , Citation: Sanusi, K.O & Ayodele, O.L. 2016. The mechanical behaviours of polyurethanes hybrid polymer composites embedded with Nickel- Titanium (NiTi) shape memory alloys.
- Description: Abstract: In this study, polyurethanes embedded with Nickel-Titanium (NiTi) SMAs is investigated by experimental methods to understand the mechanical properties of the embedded SMAs with the aim of using them as active and passive surfaces in various applications. A matrix composite was utilized for the production of the silicone moulds and casting of the specimens. The implanted NiTi SMA wires were cut into required lengths using and aged at 2500C and pre-strained by 3%. to ensure homogeneous behaviour. For each of the SMA/polyurethane composites, the treated NiTi SMA wire was properly located in the groove created in one half of the silicone mould the polyurethane resin was poured and cool to room temperature in vacuum casting machine. The result shows that the mechanical properties embedded SMA increased in of the SMA/polyurethane composite. The improvements in the properties cannot be sustained at high temperature owing to degradation of interfacial strength between the SMA and polyurethane 2 interface due to high recovery stress generated by the SMA upon activation...
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Performance and prospects of severe plastic deformation for effective biomedical titanium alloys
- Authors: Mwita, Wambura Mwiryenyi , Akinlabi, Esther Titilayo , Sanusi, Kazeem Oladele
- Date: 2018
- Subjects: Accumulative roll bonding , Asymmetric rolling , Biocompatibility
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/290389 , uj:31525 , Citation: Mwita, W.M, Akinlabi, E.T. & Sanusi, K.O. 2018. Performance and prospects of severe plastic deformation for effective biomedical titanium alloys. , ISSN: 2456-4834
- Description: Abstract: Application of severe plastic deformation (SPD) technology to process effective biomedical titanium alloys has shown promising results at laboratory scale. However, more research is still required before adopting this technology from laboratory scale to industrial scale production. This review presents performance and prospects of SPD for effective ultra-fine/nanograin structure-biomedical titanium alloys. Effective biomedical titanium alloys should have desired properties for the medical application. The properties include; high static and fatigue strengths, surface hardness for wear resistance, good ductility, corrosion resistance and biocompatibility. Based on current works reported in the literature, the review focused on; high-pressure torsion (HPT), equal channel angular pressing (ECAP), asymmetric rolling (AR), accumulative roll bonding (ARB) and repetitive corrugation and straightening (RCS). Overview of biomedical application of titanium alloys and desired material properties is presented. A detail discussion on the working principle, performance (e.g. induced strength, hardness, grain size and texture etc.) and material deformation homogeneity of each SPD method are presented. Also, prospects and challenges of each SPD method to be implemented at industrial scale for continuous and mass production are highlighted. The review concludes with the effectiveness of SPD processes, characteristics of processed samples and suggestion of future work for SPD to process effective biomedical titanium alloys at industrial scale.
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