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An order-disorder core-shell strategy for enhanced work-hardening capability and ductility in nanostructured alloys.
Duan, Fenghui; Li, Qian; Jiang, Zhihao; Zhou, Lin; Luan, Junhua; Shen, Zheling; Zhou, Weihua; Zhang, Shiyuan; Pan, Jie; Zhou, Xin; Yang, Tao; Lu, Jian.
Afiliación
  • Duan F; Laboratory of Nanomaterials & Nanomechanics, Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China.
  • Li Q; Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, China.
  • Jiang Z; Laboratory of Nanomaterials & Nanomechanics, Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China.
  • Zhou L; Laboratory of Nanomaterials & Nanomechanics, Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China.
  • Luan J; Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, China.
  • Shen Z; Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China.
  • Zhou W; School of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China.
  • Zhang S; Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China.
  • Pan J; Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China.
  • Zhou X; State Key Laboratory of Material Processing and Die & Mould Technology and School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
  • Yang T; Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, China.
  • Lu J; Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, China. taoyang6@cityu.edu.hk.
Nat Commun ; 15(1): 6832, 2024 Aug 09.
Article en En | MEDLINE | ID: mdl-39122677
ABSTRACT
Nanocrystalline metallic materials have the merit of high strength but usually suffer from poor ductility and rapid grain coarsening, limiting their practical application. Here, we introduce a core-shell nanostructure in a multicomponent alloy to address these challenges simultaneously, achieving a high tensile strength of 2.65 GPa, a large uniform elongation of 17%, and a high thermal stability of 1173 K. Our strategy relies on an ordered superlattice structure that excels in dislocation accumulation, encased by a ≈3 nm disordered face-centered-cubic nanolayer acting as dislocation sources. The ordered superlattice with high anti-phase boundary energy retards dislocation motions, promoting their interaction and storage within the nanograins. The disordered interfacial nanolayer promotes dislocation emission and effectively accommodates the plastic strain at grain boundaries, preventing intergranular cracking. Consequently, the order-disorder core-shell nanostructure exhibits enhanced work-hardening capability and large ductility. Moreover, such core-shell nanostructure exhibits high coarsening resistance at elevated temperatures, enabling it high thermal stability. Such a design strategy holds promise for developing high-performance materials.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido