Document Type
Journal Article
Publication Title
Materials Research Letters
Volume
12
Issue
6
First Page
425
Last Page
432
Publisher
Taylor & Francis
School
Centre for Advanced Materials and Manufacturing / School of Engineering
Funders
National Natural Science Foundation of China
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.
DOI
10.1080/21663831.2024.2341937
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial 4.0 License
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