烧结温度对AlTiVZr<sub>0.2</sub>B<sub>0.2</sub>高熵合金组织和性能的影响

张一村; 刘忠侠; 谭欣荣

doi:10.15980/j.tzzz.2019.07.021

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烧结温度对AlTiVZr_0.2B_0.2高熵合金组织和性能的影响
Effects of Sintering Temperature on Structure and Mechanical Properties of AlTiVZr_0.2B_0.2 High Entropy Alloy
2019年39卷第7期页码：781-784
纸质出版日期： 2019 ，
DOI： 10.15980/j.tzzz.2019.07.021

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[1]张一村,刘忠侠,谭欣荣.烧结温度对AlTiVZr_(0.2)B_(0.2)高熵合金组织和性能的影响[J].特种铸造及有色合金,2019,39(07):781-784.

Zhang Yicun, Liu Zhongxia, Tan Xinrong. Effects of Sintering Temperature on Structure and Mechanical Properties of AlTiVZr_0.2B_0.2 High Entropy Alloy[J]. Special Casting & Nonferrous Alloys, 2019,39(7):781-784.
[1]张一村,刘忠侠,谭欣荣.烧结温度对AlTiVZr_(0.2)B_(0.2)高熵合金组织和性能的影响[J].特种铸造及有色合金,2019,39(07):781-784. DOI： 10.15980/j.tzzz.2019.07.021.

Zhang Yicun, Liu Zhongxia, Tan Xinrong. Effects of Sintering Temperature on Structure and Mechanical Properties of AlTiVZr_0.2B_0.2 High Entropy Alloy[J]. Special Casting & Nonferrous Alloys, 2019,39(7):781-784. DOI： 10.15980/j.tzzz.2019.07.021.

摘要

采用真空热压烧结工艺

在不同的烧结温度下制备了AlTiVZr

0.2

高熵合金

对合金的微观组织和力学性能进行了研究。结果表明

AlTiVZr

0.2

高熵合金主要由简单立方结构的基体相和大量球状的黑色TiB

与白色Al

析出相组成

其密度低于目前常用的TC4钛合金

而硬度和压缩强度均高于TC4钛合金。1 100℃制备的高熵合金具有最高的硬度（809.7HV）、抗压强度（2 080MPa）和比强度（432.7×10

N·m/kg）。原因在于1 100℃烧结时

组织中的TiB

与白色Al

析出相弥散度最高

分布最均匀

具有最好的弥散强化效果。

Abstract

AlTiVZr

0.2

high entropy alloys were prepared by vacuum hot pressing sintering process at varied sintering temperatures.The microstructure and mechanical properties of the alloy prepared were investigated.The results show that AlTiVZr

0.2

high entropy alloy mainly consists of the matrix phase with simple cubic structure and spherical precipitates of black TiB

and white Al

.The densities of the alloys are lower than that of TC4 titanium alloy while the hardness and compressive strength are higher than that of one.Especially

the AlTiVZr

0.2

alloy prepared at 1 100 ℃ presents the highest hardness（809.7 HV）

compressive strength（2 080 MPa）and specific strength（432.7×10

N·m/kg）

which is attributed to the precipitation of TiB

and white Al

in the microstructure of the alloys sintered at 1 100℃ with the highest dispersion degree and the most uniform distribution

so showing the desirable dispersion strengthening effect.