冷却速度对Fe<sub>81</sub>（CoCrNiAl）<sub>4.75</sub>合金组织及力学性能的影响

方正; 赵荣达; 张涛; 蒋松山; 伍复发; 黄永江

doi:10.15980/j.tzzz.2019.02.022

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冷却速度对Fe₈₁（CoCrNiAl）_4.75合金组织及力学性能的影响
Effects of Cooling Rate on Microstructure and Mechanical Properties of Fe₈₁（CoCrNiAl）_4.75 High Entropy Alloy
2019年39卷第2期页码：198-201
纸质出版日期： 2019 ，
DOI： 10.15980/j.tzzz.2019.02.022

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[1]方正,赵荣达,张涛,蒋松山,伍复发,黄永江.冷却速度对Fe_(81)(CoCrNiAl)_(4.75)合金组织及力学性能的影响[J].特种铸造及有色合金,2019,39(02):198-201.

Fang Zheng, Zhao Rongda, Zhang Tao, et al. Effects of Cooling Rate on Microstructure and Mechanical Properties of Fe₈₁（CoCrNiAl）_4.75 High Entropy Alloy[J]. Special Casting & Nonferrous Alloys, 2019,39(2):198-201.
[1]方正,赵荣达,张涛,蒋松山,伍复发,黄永江.冷却速度对Fe_(81)(CoCrNiAl)_(4.75)合金组织及力学性能的影响[J].特种铸造及有色合金,2019,39(02):198-201. DOI： 10.15980/j.tzzz.2019.02.022.

Fang Zheng, Zhao Rongda, Zhang Tao, et al. Effects of Cooling Rate on Microstructure and Mechanical Properties of Fe₈₁（CoCrNiAl）_4.75 High Entropy Alloy[J]. Special Casting & Nonferrous Alloys, 2019,39(2):198-201. DOI： 10.15980/j.tzzz.2019.02.022.

摘要

利用SEM、EDS、XRD和拉伸性能测试等手段

系统地研究了冷却速度对铸态Fe

（CoCrNiAl）

4.75

合金的微观组织和力学性能的影响。结果表明

其在不同冷却速度下均发生马氏体相变

且随着冷却速度下降

马氏体的体积分数逐渐增多。合金的组织结构为单一BCC相。合金的力学性能随着冷却速度降低

表现为先下降后增大的趋势

变形区域内的滑移带越来越致密

塑性变形能力增强。

Abstract

The effects of cooling rate on the microstructure and mechanical properties of the as-cast Fe

（CoCrNiAl）

4.75

high entropy alloy were investigated by SEM

EDS

XRD and tensile testing.The results show that the alloy undergoes martensite transformation at different cooling rates

and the volume fraction of martensite is increasesd with the decrease of cooling rate.The structure of the alloy is a single BCC phase.The mechanical properties of the alloy is changed with the decrease of the cooling rate

presenting the tendency of decrease firstly and then increase.The slip zone in the deformation zone is denser with the decrease of the cooling rate and the plastic deformation ability is enhanced.