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Paper Title : Effects of Powder Bed Temperature on Ti-6Al-4V Alloy Fabricated via Selective Laser Melting
Authors : Sachin Shishodia Kamal Kishor Sharma Zakir Ali
DOI Link : Na
Abstract :
The use of laser powder bed fusion (LPBF) in the precise production of complex formed structure parts is growing need of the industry. During production, the martensitic microstructure of the Ti-6Al-4V alloy is easily formed. Preheating the powder bed can improve the mechanical characteristics by enhancing the thermal field created by cyclic laser heating during LPBF. All of the Ti-6Al-4V alloy samples produced by LPBF in the present research exhibit a near-full densification state, with a densification ratio of above 99.4%. The specimens are made of a single type of α- martensite when the temperature of the powder bed is less than 400 ºC. As the temperature rises over 400 ºC, the V element diffuses and redistributes, that leads to precipitate at the limits of the α-martensite. Additionally, as the temperature of the powder bed rises, the α/α lath becomes coarser. The specimens created at temperatures below 400 °C have a high strength but poor ductility. Additionally, when the temperature rises above 400 °C, the ultimate tensile strength and yield strength somewhat decline while the ductility increases significantly.
Keywords : Powder, Bed, Laser, Temperature, Beam, Power, Layer, Fusion
Available at : https://discoveryjournal.in/dashboard1/papers/DISCOVERY2157943073.pdf
Publication Details :
Registration ID DISCOVERY49
Published Paper ID DISCOVERY2157943073
Published in Volume 1, Issue 1, March 2023
Page number 117-125
ISSN Number XXXXXXX
Journal DOI number : XXXXXXXXX
Paper Title : Effects of Powder Bed Temperature on Ti-6Al-4V Alloy Fabricated via Selective Laser Melting
Authors : Sachin Shishodia Kamal Kishor Sharma Zakir Ali
DOI Link : Na
Abstract :
The use of laser powder bed fusion (LPBF) in the precise production of complex formed structure parts is growing need of the industry. During production, the martensitic microstructure of the Ti-6Al-4V alloy is easily formed. Preheating the powder bed can improve the mechanical characteristics by enhancing the thermal field created by cyclic laser heating during LPBF. All of the Ti-6Al-4V alloy samples produced by LPBF in the present research exhibit a near-full densification state, with a densification ratio of above 99.4%. The specimens are made of a single type of α- martensite when the temperature of the powder bed is less than 400 ºC. As the temperature rises over 400 ºC, the V element diffuses and redistributes, that leads to precipitate at the limits of the α-martensite. Additionally, as the temperature of the powder bed rises, the α/α lath becomes coarser. The specimens created at temperatures below 400 °C have a high strength but poor ductility. Additionally, when the temperature rises above 400 °C, the ultimate tensile strength and yield strength somewhat decline while the ductility increases significantly.
Keywords : Powder, Bed, Laser, Temperature, Beam, Power, Layer, Fusion
Available at : https://discoveryjournal.in/dashboard1/papers/DISCOVERY2157943073.pdf
Publication Details :
Registration ID DISCOVERY49
Published Paper ID DISCOVERY2157943073
Published in Volume 1, Issue 1, March 2023
Page number 117-125
ISSN Number XXXXXXX
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