Deformation behavior and microstructure evolution of as-cast Ti2ZrMo0.5Nb0.5 high entropy alloy

• DOI: 10.1016/j.jmrt.2021.06.040
• Publication Date: 2021-06-18T15:25:17Z
• Authors: Lijuan Xu; Zhaoqi Chen; Yunfei Zheng; Xiaohan Wang; Shiwei Han; Shulong Xiao; Yuyong Chen
• Keywords: Dynamic Recrystallization; Equiaxed crystals; High-Entropy Alloys; Recrystallization (geology)

A high entropy alloy (HEA) with a composition of Ti2ZrMo0.5Nb0.5 was prepared by vacuum induction melting technology. The mechanical properties at room temperature and elevated (900 °C–1150 °C), microstructure evolution hot deformation behavior during are studied. as-cast is composed equiaxed grains the yield strength, apparent plastic strain 1306 MPa 44%, respectively. By TEM analysis, ZrTi2 Laves C15 phase found corresponding precipitation strengthening effect accompanied solid solution as ramification high-entropy alloy. Then compression tests were carried out. deformed still maintains same single BCC structure state. It noted that when 900 °C, mainly exhibits dynamic recovery (DRV) characteristics, reaches 1000 there clear recrystallization (DRX) characteristics in structure, which analyzed features continuous (CDRX). Keeping 1150 rate 0.1 s−1, discontinuous (DDRX) appear, decreases, CDRX becomes main mechanism again.