About this Abstract |
Meeting |
Advances in Welding and Additive Manufacturing Research 2022
|
Symposium
|
Advances in Welding and Additive Manufacturing Research 2022
|
Presentation Title |
Influence of Processing Conditions on WE43 Magnesium Alloy Fabricated by Laser Powder Bed Fusion |
Author(s) |
Bangzhao Yin, Jinge Liu, Bo Peng, Peng Wen, Bingchuan Liu, Xiaolin Ma, Caimei Wang, Yun Tian, Yufeng Zheng |
On-Site Speaker (Planned) |
Bangzhao Yin |
Abstract Scope |
WE43 is a widely used magnesium alloy with high strength as well as a high resistance to heat and corrosion. Laser powder bed fusion (L-PBF) of WE43 has attracted plenty of attentions considering tremendous advantages for customized production in aeronautic and medical fields. Layer thickness is of great significance to efficiency, quality and properties during L-PBF, but hasn’t been studied for magnesium alloys. This work fabricated WE43 bulk cubes, porous scaffolds and thin walls by using various layer thickness in a range of 10-40 μm. The optimized laser energy input for high relative density increased with increasing layer thickness, and was different for bulk cubes and porous scaffolds with the same layer thickness. Scanning contour offset also need adjustment to achieve high formation accuracy at different layer thickness, the porosity error between designed and as-built scaffolds were within 10%. For microstructures, the precipitation phases increased with increasing layer thickness, while average grain size decreased. The tensile strength was slightly different and the elongation obviously enhanced with increasing layer thickness for L-PBF bulk samples, reaching 287.20±2.26 MPa and 15.12±0.79% with the layer thickness of 40 μm. The effect of layer thickness was not obvious on compressive strength and elastic module of porous L-PBF samples, since the structural factors might counteract the microstructural influence. The corrosion rate of L-PBF bulk samples was faster than that of casted counterparts, and accelerated with increasing layer thickness, mainly attributed to the greater number of precipitation phases. Overall, a relatively high layer thickness is recommended for L-PBF of WE43 if the processing condition is appropriately optimized, which provides better ductility and higher formation efficiency as well as the little sacrifice on dimensional accuracy and corrosion resistance. |
Proceedings Inclusion? |
Undecided |