|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advances in Multi-Principal Elements Alloys X
||Additive Manufacturing and Mechanical Properties of Al18Co30Cr10Fe10Ni32 Eutectic Multi-Principal Elements Alloy Fabricated by Laser-Powder Bed Fusion
||Abhishek Mehta, Thinh Huynh, Kevin Graydon, Asif Mahmud, Yongho Sohn
|On-Site Speaker (Planned)
Additive manufacturing of novel Al18Co30Cr10Fe10Ni32 eutectic multi-principal elements alloys (MPEAs) was carried out by the laser powder bed fusion (LPBF) using gas atomized alloy powders. LPBF optimization was performed as a function of laser power (200 – 350 W) and scan speed (300 – 1800 mm/s). Density of greater than 99.6% was obtained at an optimum LPBF parameter. Microstructure of as-fabricated LPBF specimens exhibited a unique trimodal microstructure, along the build direction, which consisted fine cellular, coarse cellular eutectic structure, in addition to, conventional lamellar eutectic structure consisting of FCC and BCC phases. This microstructural variation was significantly different from the starting powder microstructure and the melt-pool microstructure observed during single laser scanning of arc-melted bulk alloy. Details of microstructural characteristics, examined via electron microscopy and X-ray diffraction, and mechanical properties (tensile and instrumented hardness) will be presented and discussed with respect to the MPEA produced by traditional manufacturing method.
||Additive Manufacturing, High-Entropy Alloys, Phase Transformations