Surface severe plastic deformation-enabled deformation behavior control and mechanical property enhancement in metastable ferrous medium-entropy alloys

Gu, G. H.*; Jeong, S. G.*; Lee, J. H.*; Harjo, S. ; Gong, W. ; Amanov, A.*; Bae, J. W.*; Kwon, H.*; Kim, H. S.*

Stacking fault energy (SFE) controls key deformation mechanisms in metals. This study demonstrates that apparent SFE and deformation behavior can be tuned by modifying only the near-surface microstructure (100 um) through surface severe plastic deformation. The resulting gradient microstructure reduces apparent SFE, promoting martensitic transformation via preferential nucleation and stress partitioning. Consequently, mechanical properties are enhanced, achieving higher strength with minimal ductility loss, highlighting the effectiveness of localized microstructural engineering.

Language	:	English
Journal	:	International Journal of Plasticity
Volume	:	197
Number	:
Pages	:	p.104581_1 - 104581_21
Publication Year/Month	:	2026/02
Meeting title	:
Held date	:
Location (city)	:
Location (country)	:
Patent information	:
PDF	:
Paper URL	:	https://doi.org/10.1016/j.ijplas.2025.104581
DOI for research data	:	Link to research data related to this paper/report.
Keywords	:	no keyword
Research Facility	:	J-PARC物質・生命科学実験施設
Press Release	:
JAEA R&D Navigator	:
Cooperating Institute	:

Accesses	:	- Accesses
Web of Science® Times Cited Count	:	Times Cited Count： If you would like to get the latest times cited, please access the Web of Science®. http://www.webofknowledge.com/wos
InCites™	:	Percentile:80.21 Category:Engineering, Mechanical
Altmetrics	:

Registration No. : AA20250635
JAEA Abstracts No. : 54000881
Paper Submission No. : 31374

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.