|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Entropy Alloys VI
||A Comprehensive Analysis and Modeling of the Serration Behavior in High Entropy Alloys and Other Material Systems
||Jamieson Brechtl, Xie Xie, Shuying Chen, Haoyan Diao, Bilin Chen, Yunzhu Shi, Karin A. Dahmen, Peter K. Liaw, Steven J. Zinkle
|On-Site Speaker (Planned)
A serrated flow, which is an example of a complex process of great engineering significance, is associated with the inhomogeneous deformation in an alloy. This type of behavior, which typically occurs during dynamic strain aging, is also known as the Portevin–Le Chatelier effect and is characterized by fluctuations in the stress-strain curve. For this study, a comprehensive analysis was performed on this type of behavior in high entropy alloys and other material systems exposed to different strain rates and temperatures. Analytical methods used include the refined composite multiscale entropy analysis, multifractal analysis, and statistical techniques. Results of the analysis indicate that the serrated flow was found to be affected by test temperature and strain rates. In addition, the composition was found to affect the irregularity of the serrated flow as well. A link between the microstructure and the changes in the stress-drop behavior will also be discussed.
||Planned: Supplemental Proceedings volume