About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
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Additive Manufacturing of Titanium-based Materials: Processing, Microstructure and Material Properties
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Presentation Title |
Effect of Processing Parameters on Texture Evolution of Laser Powder Bed Fusion Processed Hydride-Dehydride Ti-6Al-4V Powder |
Author(s) |
Mohammadreza Asherloo, Muktesh Paliwal, Anthony D Rollett, Amir Mostafaei |
On-Site Speaker (Planned) |
Mohammadreza Asherloo |
Abstract Scope |
Hydride-dehydride (HDH) powder with particle size distribution of 50-120 μm is additively processed by laser powder bed fusion (LPBF) using two sets of processing parameters of (1) constant laser power of 370 W and varying laser scan speed, and (2) constant laser scan speed of 1250 mm/s and varying laser power to study the effect on the texture evolution and microstructure of the LPBF Ti-6Al-4V parts. Electron backscattered diffraction (EBSD) analyses are conducted on cross-sections. At a constant power, we observed a transition of grain morphology from equiaxed to columnar and decrease in anisotropy of the part by increasing the scan speed. When the scan speed is constant, however, an increase of laser power does not show significant effect on anisotropy and grain morphology. Further analysis of EBSD data shows no change in the average alpha prime lath size by changing the processing parameters. |