Author Identifier (ORCID)
Lai Chang Zhang: https://orcid.org/0000-0003-0661-2051
Abstract
Owing to the cellular structure that limits dislocation motion upon stress loading, additively manufactured (AM) refractory high-entropy alloys (HEAs) exhibit an excellent strength-plasticity synergy. This work integrates micro/nano-mechanical experiments with statistical physics modeling to examine dislocation nucleation and slip in AM-fabricated TiNbTaZrMo HEA. Computational results indicated that the activation volume for initial dislocation nucleation is about one atomic volume, facilitating dislocation initiation. Nanoindentation and in-situ micro-pillar compression reveal no significant pop-in events, indicating that the cellular structure impedes dislocation slip and thus prevents plasticity reduction from dislocation slipping near grain boundaries. This work provides a thorough investigation into the interplay between incipient plasticity, dislocations, and cellular structure in AM-produced TiNbTaZrMo, offering new insights into the design and advancement of AM-fabricated refractory HEAs.
Document Type
Journal Article
Date of Publication
1-1-2025
Volume
20
Issue
1
Publication Title
Virtual and Physical Prototyping
Publisher
Taylor & Francis
School
Centre for Advanced Materials and Manufacturing / School of Engineering
RAS ID
88205
Funders
National Key Research and Development Program of China (2024YFE0109000) / National Natural Science Foundation of China (52274387, 52311530772) / Medical-Engineering Cross Foundation of Shanghai Jiao Tong University (YG2024LC04, YG2023QNA21) / National Major Scientific Instruments and Equipments Development Project of National Natural Science Foundation of China (52227807) / ECU Industrial Grant (G1006320) / ECU DVC Strategic Research Support Fund 23965)
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Comments
Liu, C., Wang, L., Luo, M., Wang, K., De Battista, M., Zhang, L., Lu, W., Zhang, L., & Zhang, D. (2025). The strengthening mechanisms and incipient plasticity of additively manufactured biomedical refractory high entropy alloys. Virtual and Physical Prototyping, 20(1). https://doi.org/10.1080/17452759.2025.2567380