Graphene-decorated bimodal pure metal with high strength and ductility

被引：0
作者：
Lin, Zhongze [1 ,2 ,3 ]
Sun, Zhe [1 ,2 ,3 ]
Luo, Boyi [1 ,2 ,3 ]
Tang, Ganpei [1 ,2 ,3 ]
Jiang, Xin [1 ,2 ,3 ]
Shen, Zhe [1 ,2 ,3 ,4 ]
Ding, Biao [1 ,2 ,3 ]
Zhong, Yunbo [1 ,2 ,3 ]
机构：
[1] Shanghai Univ, State Key Lab Adv Special Steel, Shanghai 200444, Peoples R China
[2] Shanghai Univ, Shanghai Key Lab Adv Ferromet, Shanghai 200444, Peoples R China
[3] Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China
[4] Shanghai Univ, Shanghai Engn Res Ctr Integrated Circuits & Adv Di, Shanghai 200444, Peoples R China
来源：
MATERIALS RESEARCH LETTERS | 2024年 / 12卷 / 11期
基金：
中国国家自然科学基金;
关键词：
bimodal structure; graphene; microstructure design; mechanical properties; microcrack behavior; HETEROSTRUCTURED MATERIALS; MECHANICAL-PROPERTIES; MATRIX COMPOSITES; ENHANCED STRENGTH; DEFORMATION; COMBINATION; EVOLUTION; DEFECTS; GRAINS;
D O I：
10.1080/21663831.2024.2386436
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Heterostructured design and microcrack management mitigate the strength-ductility dilemma in metallic materials. Here, we demonstrate a simultaneous enhancement of strength and ductility in graphene-decorated bimodal pure nickel, achieving a strength increase to 1 GPa and an 18% improvement in elongation by designing heterostructure with graphene, metal powders, and metal foams. The results show that grain refinement, hetero-deformation-induced hardening, and activated stacking faults mainly cause the strength-ductility synergy. Additionally, while dispersed microcracks nucleate within the fine grain zones, their propagation is constrained by the coarse grain zones. This study provides new insights into improving the strength-ductility combination in metallic materials. [GRAPHICS]
引用
收藏
页码：815 / 824
页数：10
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