Enhanced strength and ductility of metal composites with intragranularly dispersed reinforcements by additive manufacturing
Original Reports|更新时间:2026-08-19
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Enhanced strength and ductility of metal composites with intragranularly dispersed reinforcements by additive manufacturing
Materials Research LettersVol. 11, Issue 5, Pages: 360-366(2023)
作者机构:
1. a State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University
2. b Collaborative Innovation Center of Biomedical Functional Materials and Key Laboratory of Biofunctional Materials of Jiangsu Province School of Chemistry and Materials Science Nanjing Normal University
3. c Department of Mechanical Engineering National University of Singapore
4. d School of Material Science and Engineering Gleiter Institute of Nanoscience Nanjing University of Science and Technology
Bingkun Zou, Lei Wang, Yanming Zhang, et al. Enhanced strength and ductility of metal composites with intragranularly dispersed reinforcements by additive manufacturing[J]. Materials Research Letters, 2023, 11(5): 360-366.
DOI:
Bingkun Zou, Lei Wang, Yanming Zhang, et al. Enhanced strength and ductility of metal composites with intragranularly dispersed reinforcements by additive manufacturing[J]. Materials Research Letters, 2023, 11(5): 360-366.DOI: 10.1080/21663831.2022.2153630.
Enhanced strength and ductility of metal composites with intragranularly dispersed reinforcements by additive manufacturing
Reinforcements in metal composites are usually dispersed at grain boundaries. We here show that the rapid solidification during laser additive manufacturing enables the spontaneous engulfment of reinforcing particles inside aluminum grains
which helps to decouple the stress concentration induced by grain boundaries and reinforcements. The additively manufactured TiB
2
-Al composite possesses 30% increase in tensile strength and nearly tripled ductility as compared with composite obtained by the traditional method. Our experimental investigations indicate that the intragranular dispersion of particles not only inhibits crack nucleation but also promotes strain hardening
leading to the remarkably enhanced mechanical properties.