|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advances in Multi-Principal Elements Alloys X
||Experimental, Theoretical, and Numerical Study for Dynamic Strain Aging in HfNbTaTiZr High-Entropy Alloys
||Yooseob Song, Weidong Li, Shuying Chen, Ko-Kai Tseng, Jien-Wei Yeh, Peter K. Liaw
|On-Site Speaker (Planned)
In the present work, a systematic investigation of the mechanics of refractory high-entropy alloys with a focus on dynamic strain aging (DSA) is carried out through experimental, theoretical, and numerical approaches. The samples of single-phase body-centered cubic HfNbTaTiZr refractory high-entropy alloys are fabricated through an arc-melting process and tested at a wide range of temperatures to demonstrate the presence of dynamic strain aging. A new constitutive model is developed, considering several important strengthening mechanisms in this type of alloys, including lattice distortion and dynamic strain aging. Correspondingly, the finite element algorithm for the developed model is also presented in the current work via writing a user-defined subroutine. The proposed constitutive model and the corresponding finite element algorithm are validated using the experimental data. The mechanics of these alloys is further studied, employing the validated theoretical model and numerical algorithm.
||High-Entropy Alloys, Mechanical Properties, Modeling and Simulation