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Volume 18
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10.3390/ma18204747
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Enhancing Strength-Ductility Synergy in Rolled High-Thermal-Conductivity Mg-Mn-Ce Alloys via Accumulated Strain

by
Xu Zhang
1,2,
Taiki Nakata
3,
Enyu Guo
4,
Wenzhuo Xie
5,
Wenke Wang
5,
Chao Xu
1,2,*,
Jing Zuo
1,2,
Zelin Wu
1,2,
Kaibo Nie
6,
Xiaojun Wang
2,
Shigeharu Kamado
3 and
Lin Geng
7
1
State Key Laboratory of Precision Welding & Joining of Materials and Structures, Harbin Institute of Technology, Harbin 150001, China
2
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
3
Department of Mechanical Engineering, Nagaoka University of Technology, Nagaoka 940-2188, Japan
4
School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China
5
School of Materials Science and Engineering, Harbin Institute of Technology, Weihai 264209, China
6
College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
7
Harbin Institute of Technology Suzhou Research Institute, Suzhou 215000, China
*
Author to whom correspondence should be addressed.
Materials 2025, 18(20), 4747; https://doi.org/10.3390/ma18204747
Submission received: 8 September 2025 / Revised: 24 September 2025 / Accepted: 7 October 2025 / Published: 16 October 2025
(This article belongs to the Special Issue Processing of Metals and Alloys)
Versions Notes

Abstract

Magnesium (Mg) alloys are prized as the lightest structural materials but often suffer from a strength–ductility trade-off that is particularly challenging for applications demanding high thermal conductivity. Aiming to resolve this issue, rolled ternary Mg-0.9Mn-1.9Ce (wt.%) alloy sheets were designed and fabricated, and the influence of rolling strain on optimizing the property balance was systematically investigated. The cast alloy was homogenized and rolled to two accumulated strains to obtain S10 (90%) and S20 (95%), followed by microstructure characterization and mechanical/thermal evaluation. Compared with S10, S20 developed finer, more equiaxed grains and a weaker basal texture via enhanced dynamic recrystallization; concurrent fragmentation and uniform dispersion of second-phase particles further contributed to strengthening. Consequently, S20 achieved 14.2% and 13.7% increases in yield and tensile strengths, respectively, with a slight improvement in elongation, while retaining high thermal conductivity (134.4 W·m−1·K−1 vs. 138.1 W·m−1·K−1 for S10). The minimal conductivity penalty is attributed to the low solute level in the α-Mg matrix, which limits electron scattering. These results provide experimental and mechanistic guidance for developing rolling Mg alloys that combine high mechanical performance with excellent thermal efficiency.
Keywords: rolling; second phase; dynamic recrystallization; mechanical properties; thermal conductivity rolling; second phase; dynamic recrystallization; mechanical properties; thermal conductivity

Share and Cite

MDPI and ACS Style

Zhang, X.; Nakata, T.; Guo, E.; Xie, W.; Wang, W.; Xu, C.; Zuo, J.; Wu, Z.; Nie, K.; Wang, X.; et al. Enhancing Strength-Ductility Synergy in Rolled High-Thermal-Conductivity Mg-Mn-Ce Alloys via Accumulated Strain. Materials 2025, 18, 4747. https://doi.org/10.3390/ma18204747

AMA Style

Zhang X, Nakata T, Guo E, Xie W, Wang W, Xu C, Zuo J, Wu Z, Nie K, Wang X, et al. Enhancing Strength-Ductility Synergy in Rolled High-Thermal-Conductivity Mg-Mn-Ce Alloys via Accumulated Strain. Materials. 2025; 18(20):4747. https://doi.org/10.3390/ma18204747

Chicago/Turabian Style

Zhang, Xu, Taiki Nakata, Enyu Guo, Wenzhuo Xie, Wenke Wang, Chao Xu, Jing Zuo, Zelin Wu, Kaibo Nie, Xiaojun Wang, and et al. 2025. "Enhancing Strength-Ductility Synergy in Rolled High-Thermal-Conductivity Mg-Mn-Ce Alloys via Accumulated Strain" Materials 18, no. 20: 4747. https://doi.org/10.3390/ma18204747

APA Style

Zhang, X., Nakata, T., Guo, E., Xie, W., Wang, W., Xu, C., Zuo, J., Wu, Z., Nie, K., Wang, X., Kamado, S., & Geng, L. (2025). Enhancing Strength-Ductility Synergy in Rolled High-Thermal-Conductivity Mg-Mn-Ce Alloys via Accumulated Strain. Materials, 18(20), 4747. https://doi.org/10.3390/ma18204747

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