|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||High Entropy Alloys V
||A Multifaceted Approach to Analyze the Serration Behavior in High Entropy Alloys and Other Material Systems
||Jamieson Brechtl, Xie Xie, Shuying Chen, Haoyan Diao, Yunzhu Shi, Tengfei Yang, Bilin Chen, Karin A. Dahmen, Peter K. Liaw, Steven J. Zinkle
|On-Site Speaker (Planned)
An example of a complex process of great engineering significance is the serrated flow that occurs in many materials during mechanical deformation. Here a serrated flow is associated with the inhomogeneous deformation in an alloy and is represented by fluctuations in the stress-strain curve. For this study, a multifaceted approach was used to examine this behavior in high entropy alloys and other material systems exposed to different strain rates, temperatures, and irradiation conditions. Analytical methods used include the refined composite multiscale entropy analysis and multifractal analysis techniques. The cumulative distribution functions of stress drops were analyzed for any universal scaling behavior based on the Mean Field Theory. Results of the analysis found that the serrated flow was affected by factors such as test temperature, strain rates and irradiation-displacement damage. A link between the changes in the stress-drop behavior and the microstructure of the crystalline alloys will also be discussed.
||Planned: Supplemental Proceedings volume