AlCrFeMnNi High-Entropy Alloy Fabricated by Laser Additive Manufacturing under Direct-current Electric Field Controlled

摘要

AlCrFeMnNi high-entropy alloy was prepared by laser additive manufacturing with gas-atomized pre-alloy powders.The phase, microstructure and microhardness of HEA have been investigated. The HEAs without electric field controlledand under controlled were composed of single BCC phase. Under the controlling of electric field, the pores presented thephenomenon of reducing. Due to the reducing of pores, the HEA under electric field controlled became harder andexhibited high microhardness of about 529.9 HV_(0.2), which was 6.49% higher than the HEA without controlled.