Effect of annealing temperature on microstructure and mechanical properties of FeMoCrVTiSix high entropy alloy

doi:10.13251/j.issn.0254-6051.2020.12.002

Abstract

Abstract: Effect of different annealing temperatures (400, 600, 800, 1100 ℃) on the microstructure and mechanical properties of FeMoCrVTiSi_x(x=0, 0.3) alloy was studied by using X-ray diffractometer(XRD), scanning electron microscope(SEM), differential thermal scanning analyzer(DSC), microhardness tester and universal material testing machine. The results show that the addition of Si improves the thermal stability of the FeMoCrVTi high entropy alloy. After annealing treatment, the microstructure of FeMoCrVTiSi_x high entropy alloy is still mainly composed of BCC solid solution phase, but a black fine Ti-rich phase appears at the edge of the dendrite, and its content increases with the increase of annealing temperature until it re-dissolves at 1100 ℃. The precipitation of Ti-rich phase is conducive to the improvement of the hardness. The hardness of the specimen reaches the maximum value annealed at 800 ℃, with that of the FeMoCrVTi and FeMoCrVTiSi_0.3 alloys reaching 932 HV0.2 and 998 HV0.2, respectively.

Key words: FeMoCrVTiSi_x high entropy alloy, annealing treatment, microstructure, mechanical properties

CLC Number:

TG156.2

Xue Yanjun, Yu Wenchao, Wang Maoqiu, Shi Jie. Effect of annealing temperature on microstructure and mechanical properties of FeMoCrVTiSi_x high entropy alloy[J]. Heat Treatment of Metals, 2020, 45(12): 7-12.

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Effect of annealing temperature on microstructure and mechanical properties of FeMoCrVTiSi_x high entropy alloy

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