Microstructural Evolution of Quaternary AlCoCrNi High-Entropy Alloys during Heat Treatment

被引：2

作者：

Jumaev, Elyorjon ^{[1
]}

Park, Hae-Jin ^{[2
]}

Abbas, Muhammad Aoun ^{[2
]}

Yusupov, Dilshodbek ^{[2
]}

Hong, Sung-Hwan ^{[2
]}

Kim, Ki-Buem ^{[2
]}

机构：

[1] FIE UzLITI Engn LLC, 28B Beshyogoch, Tashkent 100066, Uzbekistan

[2] Sejong Univ, Dept Nanotechnol & Adv Mat Engn, 209 Neungdong Ro, Seoul 05006, South Korea

来源：

MATERIALS | 2024年 / 17卷 / 14期

基金：

新加坡国家研究基金会;

关键词：

high-entropy alloy; mechanical properties; chemical composition; heat treatment; sigma phase; MECHANICAL-PROPERTIES; TENSILE PROPERTIES; PHASE-COMPOSITION; WEAR-RESISTANCE; SOLID-SOLUTION; SIGMA-PHASE; DECOMPOSITION; BEHAVIOR; SYSTEM;

D O I：

10.3390/ma17143617

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This study examines the microstructural evolution and mechanical properties of quaternary AlCoCrNi high-entropy alloys after heat treatment at 873 K for 72 and 192 h. The changes in nanostructure and phase transformation based on the heat treatment duration were as follows: B2 dendrite + BCC interdendrite and sigma phases after 72 h; B2 dendrite and interdendritic sigma phases + BCC after 192 h. After annealing, the morphology of the dendritic region shifted from spherical to needle-like, and the interdendritic region transformed from a spinodal-like to a plate-like morphology. Additionally, a phase transformation was observed in the dendritic regions of the annealed alloys at the nano-scale. The presence of the sigma phase in AlCoCrNi high-entropy alloys significantly improved the yield strength to around 1172 MPa; nevertheless, it decreased the compressive strain rapidly to 0.62%.

引用

页数：11

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