View in EDS

The strengthening mechanisms and incipient plasticity of additively manufactured biomedical refractory high entropy alloys.

Saved in:
Bibliographic Details
Title: The strengthening mechanisms and incipient plasticity of additively manufactured biomedical refractory high entropy alloys.
Authors: Liu, Changxi1 (AUTHOR), Wang, Liqiang1 (AUTHOR) wang_liqiang@sjtu.edu.cn, Luo, Miao2 (AUTHOR) Luo_miao95@126.com, Wang, Kuaishe3 (AUTHOR) wangkuaishe888@126.com, Battista, Marco De1 (AUTHOR), Zhang, Ling4 (AUTHOR), Lu, Weijie1 (AUTHOR), Zhang, Lai-Chang5 (AUTHOR) lczhangimr@gmail.com, Zhang, Di1 (AUTHOR)
Source: Virtual & Physical Prototyping. Dec2025, Vol. 20 Issue 1, p1-14. 14p.
Subjects: Strengthening mechanisms in solids, Dislocation nucleation, Direct metal laser sintering, Nanomechanics, Material plasticity, High-entropy alloys, Microstructure
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. [ABSTRACT FROM AUTHOR]
Copyright of Virtual & Physical Prototyping is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
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. [ABSTRACT FROM AUTHOR]
ISSN:17452759
DOI:10.1080/17452759.2025.2567380