The paper is to prepare the refractory high entropy alloy, NbMoTaTi, in aerospace industry by laser cladding deposition technology. The crystal structure of the alloy is single phase solid solution structure of BCC analyzed by Xray diffraction. The grain size of the NbMoTaTi high entropy alloy is mostly between 2-12μm. The average micro-hardness is 397.6HV and the room temperature compression strength is 1301.83MPa. The high temperature compression strength under 1000℃ is only 347.28MPa because of the defects such as pores, without /incomplete melting Ta powder particles and cracks generated during the forming process of NbMoTaTi high entropy alloys, so further research is needed.
李青宇1,李涤尘1,张 航1,张安峰1,梁景怡2,王兴理想1,闫浩祺1. 激光熔覆沉积成形NbMoTaTi难熔高熵合金的组织与强度研究*[J]. 航空制造技术, 2018, 61(10): 61-67.
LI Qingyu1, LI Dichen1, ZHANG Hang1, ZHANG Anfeng1, LIANG Jingyi2, WANG Xinglixiang1,. Study on Structure and Strength of NbMoTaTi Refractory High Entropy Alloy Fabricated by Laser Cladding Deposition. Aeronautical Manufacturing Technology, 2018, 61(10): 61-67.