Age Hardening Behavior of Al0.3CrFe1.5MnNi0.5Ti0.2(Si0.2) High-entropy Alloys

Zhang Guoxi; Chen Chong; Liu Zhiyuan

doi:10.15980/j.tzzz.2017.01.021

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Age Hardening Behavior of Al_0.3CrFe_1.5MnNi_0.5Ti_0.2(Si_0.2) High-entropy Alloys
Vol. 37, Issue 1, Pages: 78-82(2017)
Published： 2017 ，
DOI： 10.15980/j.tzzz.2017.01.021

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[1]张国玺,陈冲,刘志远.Al_(0.3)CrFe_(1.5)MnNi_(0.5)Ti_(0.2)(Si_(0.2))高熵合金的时效硬化行为[J].特种铸造及有色合金,2017,37(01):78-82.

Zhang Guoxi, Chen Chong, Liu Zhiyuan. Age Hardening Behavior of Al_0.3CrFe_1.5MnNi_0.5Ti_0.2(Si_0.2) High-entropy Alloys. [J]. Special Casting & Nonferrous Alloys 37(1):78-82(2017)
[1]张国玺,陈冲,刘志远.Al_(0.3)CrFe_(1.5)MnNi_(0.5)Ti_(0.2)(Si_(0.2))高熵合金的时效硬化行为[J].特种铸造及有色合金,2017,37(01):78-82. DOI： 10.15980/j.tzzz.2017.01.021.

Zhang Guoxi, Chen Chong, Liu Zhiyuan. Age Hardening Behavior of Al_0.3CrFe_1.5MnNi_0.5Ti_0.2(Si_0.2) High-entropy Alloys. [J]. Special Casting & Nonferrous Alloys 37(1):78-82(2017) DOI： 10.15980/j.tzzz.2017.01.021.

摘要

采用非自耗真空电弧熔炼炉制备了Al

0.3

CrFe

1.5

MnNi

0.5

（A

）、Al

0.3

CrFe

1.5

MnNi

0.5

0.2

（A1）和Al

0.3

CrFe

1.5

MnNi

0.5

0.2

（A

）等3种高熵合金

然后在700

000℃时效处理12h后进行了物相分析、微观组织表征和硬度测试。结果表明

3种合金的铸态组织主要由BCC相组成

时效组织主要由富Cr、Mn、Fe的BCC相、Cr

（ρ相）析出相和球形Ni-Al析出相组成。由于Ni-Al相和ρ相析出

使得A

、A

和A

合金的时效硬度（HV）分别达到899、943和955

与A

合金铸态时硬度相比分别提高了142%、154%和157%。1 000℃时效处理后

和A

合金的硬度（HV）仍高达800以上

表现出良好的时效硬化特性。

Abstract

Three high-entropy alloys including Al

0.3

CrFe

1.5

MnNi

0.5

（A

）

0.3

CrFe

1.5

MnNi

0.5

0.2

（A

）and Al

0.3

CrFe

1.5

MnNi

0.5

0.2

（A

）

were prepared by non-consumable vacuum arc melting furnace.The phase

microstructure and hardness of the aged alloys with aging at 700 ℃ to 1 000 ℃ for 12 hwere characterized.The results show that three kinds of as-cast alloys are mainly composed of BCC phase.The aged alloys are mainly composed of a mixed structure of rich（Cr

Fe）BCC phase

（ρphase）precipitates and spherical Ni-Al phase.Because of precipitation of Ni-Al phase andρphase

the A

and A

aged alloys have the maximum hardness of 899 HV

943HV and 955 HV

which is improved by 142%

154%

and 157% compared with that of the as-cast A

alloy

respectively.After aging treatment at 1 000℃

hardness of the A1 and A