Serration behavior and brittle phase-induced mechanical transitions in wrought Al0.3CoCrFeNi high-entropy alloy from 100°C to 800°C

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A Pub Date : 2025-03-27 DOI:10.1016/j.msea.2025.148261

Yaqi Wu , Jamieson Brechtl , Changwei Li , Peter K. Liaw , Guihong Geng , Yong Zhang

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引用次数: 0

Abstract

In this work, the serrated flows and temperature-dependent behavior of Al0.3CoCrFeNi were investigated. The refined composite multiscale entropy (RCMSE) method was used to model and analyze the serration behavior. The results revealed that serrated flow exhibited dynamically complex behavior, with complexity increasing with temperature. Experimental results showed that the serration type changed from type-A (regular, high-frequency serrations associated with dynamic strain aging (DSA) effects) and type B (irregular, medium-frequency serrations linked to localized dislocation motion) to type-C (low-frequency, large-amplitude serrations caused by interactions between deformation twins and dislocations) between 300°C and 600°C due to the transition from dynamic strain aging (DSA) effects to interactions between deformation twins and dislocations. Additionally, grain boundary segregation led to a transition from ductile to brittle fracture at 700°C. These findings highlight the significance of understanding serration and temperature-dependent behaviors during the deformation of the Al0.3 alloy, which is crucial for research on the temperature-dependent failure and application of high-entropy alloys.

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100°C 至 800°C 锻造 Al0.3CoCrFeNi 高熵合金中的锯齿行为和脆性相诱导的力学转变

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来源期刊

Materials Science and Engineering: A 工程技术-材料科学：综合

CiteScore

11.50

自引率

15.60%

发文量

1811

审稿时长

31 days

期刊介绍： Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.