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首页> 外文期刊>Materials Science and Engineering >High temperature deformation behavior and dynamic recrystallization in CoCrFeNiMn high entropy alloy
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High temperature deformation behavior and dynamic recrystallization in CoCrFeNiMn high entropy alloy

机译:CoCrFeNiMn高熵合金的高温变形行为和动态再结晶

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摘要

Microstructure evolution in high-entropy alloy CoCrFeNiMn during uniaxial compression to a height reduction of true strain of ≈ 1.4 in the temperature interval 600-1100 ℃ was studied. Although some differences was observed in the mechanical behavior of the alloy and the activation energy of deformation in warm (below 800 ℃) and hot (above 800 ℃) temperature intervals, microstructure evolution at all studied temperatures was found to be accompanied by discontinuous dynamic recrystallization (dDRX). During hot deformation recrystallization was primary associated with nuclea-tion of new grains on the initial grain boundaries, while in the warm interval dDRX was mainly observed in shear bands. The volume fraction of the recrystallized structure was respectively 0.085 and 0.95 at 600 and 1000 ℃ and the recrystallized grain size was found to be 0.2 and 40.4 μm for 600 and 1100 ℃, respectively.
机译:研究了高熵合金CoCrFeNiMn在600-1100℃温度区间内单轴压缩至真实应变高度降低≈1.4时的组织演变。尽管在高温(低于800℃)和高温(高于800℃)的温度区间中,合金的力学性能和变形的活化能存在一定差异,但在所有研究温度下,组织的演变都伴随着不连续的动态重结晶。 (dDRX)。在热变形过程中,再结晶主要与新晶粒在初始晶界上的核化有关,而在温暖区间,dDRX主要在剪切带中观察到。在600和1000℃下,再结晶组织的体积分数分别为0.085和0.95,在600和1100℃下,再结晶晶粒尺寸分别为0.2和40.4μm。

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