Cellular structure mediated dislocation regulation in additively manufactured refractory high entropy alloy

Authors/Creators

Changxi Liu
Lechun Xie
Lai-Chang Zhang, Edith Cowan UniversityFollow
Liqiang Wang

Abstract

A Ti1.5Nb1Ta0.5Zr1Mo0.5 (TNTZM) refractory high entropy alloy (HEA) with a cellular structure was successfully fabricated by laser powder bed fusion (L-PBF). Compression testing and cyclic deformation testing results revealed that, in the cellular structure, the cell walls could store dislocations. Furthermore, the local chemical order (LCO) plays a crucial role in controlling dislocations within the cell wall region. The LCO not only facilitates dislocation slip but also generates additional lattice distortion upon stress-induced LCO destruction to enable dislocation pinning. This work offers novel insights into the microstructure of additively manufactured refractory HEAs and uncovers a distinct dislocation regulation mechanism.

Document Type

Journal Article

Date of Publication

1-1-2024

Volume

12

Issue

6

Funding Information

National Natural Science Foundation of China

School

Centre for Advanced Materials and Manufacturing / School of Engineering

Creative Commons License

This work is licensed under a Creative Commons Attribution-Noncommercial 4.0 License

Publisher

Taylor & Francis

Comments

Liu, C., Xie, L., Zhang, L. C., & Wang. L. (2024). Cellular structure mediated dislocation regulation in additively manufactured refractory high entropy alloy. Materials Research Letters, 12(6), 425-432. https://doi.org/10.1080/21663831.2024.2341937

Recommended Citation

Liu, C., Xie, L., Zhang, L., & Wang, L. (2024). Cellular structure mediated dislocation regulation in additively manufactured refractory high entropy alloy. DOI: https://doi.org/10.1080/21663831.2024.2341937