A Review of the Serrated-Flow Phenomenon and Its Role in the Deformation Behavior of High-Entropy Alloys

Metals

Hugh Shortt¹  AnneM. Coleman¹  Xie Xie¹  PeterK. Liaw¹  R.Jackson Spurling¹  Rui Feng¹  David Hamblin¹  Shuying Chen¹  Chanho Lee¹  Bradley Straka¹  Yunzhu Shi²  Jamieson Brechtl³ 

[1] Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN 37996 USA;State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;The Bredesen Center for Interdisciplinary Research and Graduate Education, The University of Tennessee, Knoxville, TN 37996, USA;

关键词: high-entropy alloys;    serrated flow;    microstructure;    data analysis;   

DOI  :  10.3390/met10081101

来源: DOAJ

【 摘 要 】

High-entropy alloys (HEAs) are a novel class of alloys that have many desirable properties. The serrated flow that occurs in high-entropy alloys during mechanical deformation is an important phenomenon since it can lead to significant changes in the microstructure of the alloy. In this article, we review the recent findings on the serration behavior in a variety of high-entropy alloys. Relationships among the serrated flow behavior, composition, microstructure, and testing condition are explored. Importantly, the mechanical-testing type (compression/tension), testing temperature, applied strain rate, and serration type for certain high-entropy alloys are summarized. The literature reveals that the serrated flow can be affected by experimental conditions such as the strain rate and test temperature. Furthermore, this type of phenomenon has been successfully modeled and analyzed, using several different types of analytical methods, including the mean-field theory formalism and the complexity-analysis technique. Importantly, the results of the analyses show that the serrated flow in HEAs consists of complex dynamical behavior. It is anticipated that this review will provide some useful and clarifying information regarding the serrated-flow mechanisms in this material system. Finally, suggestions for future research directions in this field are proposed, such as the effects of irradiation, additives (such as C and Al), the presence of nanoparticles, and twinning on the serrated flow behavior in HEAs.

【 授权许可】

Unknown