Deformation-induced phase transformation of Co20Cr26Fe20Mn20Ni14 high-entropy alloy during high-pressure torsion at 77 K

作者：Moon Jongun; Qi Yuanshen; Tabachnikova Elena; Estrin Yuri; Choi Won Mi; Joo Soo Hyun; Lee Byeong Joo; Podolskiy Aleksey; Tikhonovsky Mikhail; Kim Hyoung Seop^*

来源：Materials Letters, 2017, 202: 86-88.

DOI：10.1016/j.matlet.2017.05.065

• Metals and alloys
• High-entropy alloy
• High-pressure torsion
• Microstructure
• Phase transformation

A deformation-induced phase transformation in a face-centered cubic (FCC) Co20Cr26Fe20Mn20Ni14 high-entropy alloy during cryogenic high-pressure torsion (HPT) discovered in this work is reported. Thermodynamic calculations prove that in the Co20Cr26Fe20Mn20Ni14 alloy, a hexagonal close-packed (HCP) phase is stable at low temperatures. Microstructural and compositional analyses suggest that a diffusionless deformation-induced FCC-to-HCP phase transformation occurred during cryogenic HPT.

• 出版日期2017-9-1