Recrystallizing annealed microstructure evolution of severe cold rolled FeCoCrNiMn high entropy alloy

doi:10.13251/j.issn.0254-6051.2022.07.029

Abstract

Abstract: Crystal structure, hardness, microstructure evolution and recrystallization behavior of the FeCoCrNiMn high-entropy alloy after severe cold rolling with reduction ratio of 95% and then annealing at 550-800 ℃ for 1 h were studied by means of X-ray diffractometer (XRD), Vickers hardness tester, optical microscope and electron backscatter diffraction (EBSD). The results show that the crystal structure of the FeCoCrNiMn high-entropy alloy always maintains an fcc structure during the cold rolling-annealing process. The beginning temperature of recrystallization is 600 ℃, and the finishing temperature is 750 ℃. As the annealing temperature increases, the hardness of the high-entropy alloy decreases first and then tends to be gentle, and microstructure gradually changes from fibrous deformed grains to randomly oriented recrystallized grains.

Key words: FeCoCrNiMn high-entropy alloy, severe cold rolling, annealing, crystal structure, microstructure evolution

CLC Number:

TG142.1

Guo Chunyan, Liu Yubao, Yang Pengfei, Li Yuan, Lü Weidong , Gao Rizeng, Zhang Yang, Hou Fusheng. Recrystallizing annealed microstructure evolution of severe cold rolled FeCoCrNiMn high entropy alloy[J]. Heat Treatment of Metals, 2022, 47(7): 163-167.

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