Mechanical properties and deformation mechanisms of Al<sub>0.1</sub>CoCrFeNi high-entropy alloys

CHEN Gang; WANG Lu; YANG Jing; LI Qiang; LYU Pin; MA Sheng-guo

doi:10.11868/j.issn.1001-4381.2018.000487

Cailiao gongcheng (Jan 2019)

Mechanical properties and deformation mechanisms of Al<sub>0.1</sub>CoCrFeNi high-entropy alloys

CHEN Gang,
WANG Lu,
YANG Jing,
LI Qiang,
LYU Pin,
MA Sheng-guo

Affiliations

CHEN Gang: Institute of Applied Mechanics and Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
WANG Lu: Institute of Applied Mechanics and Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
YANG Jing: Shanxi Key Laboratory of Material Strength and Structural Impact, Taiyuan University of Technology, Taiyuan 030024, China
LI Qiang: Institute of Applied Mechanics and Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
LYU Pin: Institute of Applied Mechanics and Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
MA Sheng-guo: Institute of Applied Mechanics and Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, China

DOI: https://doi.org/10.11868/j.issn.1001-4381.2018.000487
Journal volume & issue: Vol. 47, no. 1
pp. 106 – 111

Abstract

Read online

The Al0.1CoCrFeNi high-entropy alloy (HEA) was melted by vacuum magnetic levitation, and quasi-static tensile experiments were performed by using an INSTRON mechanical testing system. The crystal structure, surface morphology, composition, microstructure, hardness, and creep behavior of the samples before and after the experiment were analyzed by X-ray diffraction, optical microscopy, scanning electron microscopy, transmission electron microscopy, and nanoidentation. Results reveal that after tensile deformation, the alloy has an excellent strength-ductility combination, a significant strain-hardening effect, and an improved creep resistance. The fracture mode of sample is the typical microvoid accumulation fracture; there are a lot of microbands (the band width is about 200-300nm) inside the grains. The excellent strain-hardening ability is believed to be originated from the microband-induced plasticity effect during tensile loading.

Published in Cailiao gongcheng

ISSN: 1001-4381 (Print)
Publisher: Journal of Materials Engineering
Country of publisher: China
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: http://jme.biam.ac.cn/CN/1001-4381/home.shtml

About the journal

Abstract

Keywords