Influence of process parameters on porosity behaviour of laser metal deposited titanium composites
- Ogunlana, Musibau O., Akinlabi, Esther Titilayo
- Authors: Ogunlana, Musibau O. , Akinlabi, Esther Titilayo
- Date: 2016
- Subjects: Boron carbide , Laser power , Porosity
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/214397 , uj:21276 , Citation: Ogunlana, M.O & Akinlabi, E.T. 2016. Influence of process parameters on porosity behaviour of laser metal deposited titanium composites.
- Description: Abstract: This research paper reports the effect of laser power on the degree of porosity of the deposited tracks and characterized the specific porous structure. The results revealed that as the laser power was increased, the degree of porosity was however reduced. Prior the characterization process, titanium alloy and boron carbide (Ti6Al4V-B4C) composites powder were deposited on Ti6Al4V substrate using laser metal deposition (LMD) process through the application of Ytterbium fibre laser system. The laser power was varied between 800 W and 2400 W at interval of 200 W while all other process parameters were kept constant. The maximum capacity of this laser system is 3.0 KW which provides beam size of 4 mm for the control characterization of the deposited samples. After the deposition process, the samples were sectioned for porosity analysis and microstructural studies. The sectioned samples were however mounted, ground and polished according to standard metallurgical preparation of titanium alloys. The polished samples were then etched using Kroll’s reagent. Porosity analysis was observed using the optical microscope equipped with Analysis Docu Image Processing Software (ADIPS) to establish the percentage porosity and the maximum pore sizes of the composites...
- Full Text:
- Authors: Ogunlana, Musibau O. , Akinlabi, Esther Titilayo
- Date: 2016
- Subjects: Boron carbide , Laser power , Porosity
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/214397 , uj:21276 , Citation: Ogunlana, M.O & Akinlabi, E.T. 2016. Influence of process parameters on porosity behaviour of laser metal deposited titanium composites.
- Description: Abstract: This research paper reports the effect of laser power on the degree of porosity of the deposited tracks and characterized the specific porous structure. The results revealed that as the laser power was increased, the degree of porosity was however reduced. Prior the characterization process, titanium alloy and boron carbide (Ti6Al4V-B4C) composites powder were deposited on Ti6Al4V substrate using laser metal deposition (LMD) process through the application of Ytterbium fibre laser system. The laser power was varied between 800 W and 2400 W at interval of 200 W while all other process parameters were kept constant. The maximum capacity of this laser system is 3.0 KW which provides beam size of 4 mm for the control characterization of the deposited samples. After the deposition process, the samples were sectioned for porosity analysis and microstructural studies. The sectioned samples were however mounted, ground and polished according to standard metallurgical preparation of titanium alloys. The polished samples were then etched using Kroll’s reagent. Porosity analysis was observed using the optical microscope equipped with Analysis Docu Image Processing Software (ADIPS) to establish the percentage porosity and the maximum pore sizes of the composites...
- Full Text:
Surface effect of laser power on microstructural evolution and hardness behaviour of titanium matrix composites
- Ogunlana, Musibau O., Akinlabi, Esther Titilayo
- Authors: Ogunlana, Musibau O. , Akinlabi, Esther Titilayo
- Date: 2016
- Subjects: Boron carbide , Laser metal deposition , Titanium alloy
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/92390 , uj:20224 , Citation: Ogunlana, M.O., & Akinlabi, E.L. 2016. Surface effect of laser power on microstructural evolution and hardness behaviour of titanium matrix composites.
- Description: Abstract: In this paper, Titanium alloy (Ti6Al4V) powder and boron carbide (B4C) powder metal matrix composites (MMCs) were embedded on titanium alloy (Ti6Al4V) substrate using laser metal deposition (LMD). The laser power was varied between 800 W and 2400 W at an interval of 200 W while all other processing parameters were kept constant. The maximum capacity of the laser system is 3.0 KW which provides beam size of 4 mm for the control characterization of the deposited samples. The microstructural properties of the deposited samples were profound with α and β (intermetallic phase of α+β) of titanium alloy and boron carbide particles. The optical microscope (OM) was employed to characterise the grain sizes and microstructures. The microhardness were characterized using the Vickers’ hardness indenter in which the microhardness of the composites revealed an increase in the samples as the laser power increases. The hardness were observed to be between 371Hv and 471Hv for the cladded samples when compared to the substrate with approximately 360Hv.
- Full Text:
- Authors: Ogunlana, Musibau O. , Akinlabi, Esther Titilayo
- Date: 2016
- Subjects: Boron carbide , Laser metal deposition , Titanium alloy
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/92390 , uj:20224 , Citation: Ogunlana, M.O., & Akinlabi, E.L. 2016. Surface effect of laser power on microstructural evolution and hardness behaviour of titanium matrix composites.
- Description: Abstract: In this paper, Titanium alloy (Ti6Al4V) powder and boron carbide (B4C) powder metal matrix composites (MMCs) were embedded on titanium alloy (Ti6Al4V) substrate using laser metal deposition (LMD). The laser power was varied between 800 W and 2400 W at an interval of 200 W while all other processing parameters were kept constant. The maximum capacity of the laser system is 3.0 KW which provides beam size of 4 mm for the control characterization of the deposited samples. The microstructural properties of the deposited samples were profound with α and β (intermetallic phase of α+β) of titanium alloy and boron carbide particles. The optical microscope (OM) was employed to characterise the grain sizes and microstructures. The microhardness were characterized using the Vickers’ hardness indenter in which the microhardness of the composites revealed an increase in the samples as the laser power increases. The hardness were observed to be between 371Hv and 471Hv for the cladded samples when compared to the substrate with approximately 360Hv.
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