Morphology and Hardness of Al2Ni2TiCoCrCu0.5FeMo High-entropy Alloys

Wen Lizhe; Huang Yuansheng

doi:10.15980/j.tzzz.2021.08.013

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Morphology and Hardness of Al₂Ni₂TiCoCrCu_0.5FeMo High-entropy Alloys
Vol. 41, Issue 8, Pages: 992-995(2021)
Published： 2021 ，
DOI： 10.15980/j.tzzz.2021.08.013

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Wen Lizhe, Huang Yuansheng. Morphology and Hardness of Al₂Ni₂TiCoCrCu_0.5FeMo High-entropy Alloys. [J]. Special Casting & Nonferrous Alloys 41(8):992-995(2021)
DOI：

Wen Lizhe, Huang Yuansheng. Morphology and Hardness of Al₂Ni₂TiCoCrCu_0.5FeMo High-entropy Alloys. [J]. Special Casting & Nonferrous Alloys 41(8):992-995(2021) DOI： 10.15980/j.tzzz.2021.08.013.

摘要

使用真空熔炼炉和激光熔覆设备制备了块状和涂层Al

TiCoCrCu

0.5

FeMo高熵合金

使用扫描电镜、X射线衍射仪、显微硬度计分析了合金的组织结构和硬度。结果表明

两种方法制得的Al

TiCoCrCu

0.5

FeMo高熵合金均为BCC结构

但涂层仅由一种BCC结构相组成;而真空熔炼的块体高熵合金则是由两种BCC结构相组成

其具有不同的成分但具有相同的晶格常数。退火处理使晶格常数减小

块体由0.291 6 nm变成0.290 3 nm;涂层由0.290 7 nm变成0.288 9 nm。激光熔覆制备的涂层比真空熔炼制的块体合金具有更高的硬度。退火处理消除了合金的内应力

从而导致硬度略有下降

涂层硬度（HV）由853.8降至798.6;块状合金硬度（HV）由664.7降至650.9。

Abstract

The massive and coating Al

TiCoCrCu

0.5

FeMo high-entropy alloys were prepared by vacuum melting and laser cladding. X-ray diffractometer

scanning electron microscope and microhardness tester were employed to analyze microstructure and hardness. The results indicate that both alloys exhibit BCC structure

however

the coating alloy consists of only one BCC phase

while the massive alloy is composed of two BCC phases with different composition but the same lattice constants. Lattice constant is decreased with annealing treatment

where the bulk size is decreased from 0.291 6 nm to 0.290 3 nm

while the coating film is decreased from 0.290 7 nm to 0.288 9 nm. The hardness of the coating alloy is higher than that of massive alloy. Removal of residual stress by annealing leads to the decrease of hardness

and the hardness value of coating is decreased from 853.8 HV to 798.6 HV

while that of massive alloy is decreased from 664.7 HV to 650.9 HV.