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Revealing extraordinary tensile plasticity in layered Ti-Al metal composite.
Huang, M; Fan, G H; Geng, L; Cao, G J; Du, Y; Wu, H; Zhang, T T; Kang, H J; Wang, T M; Du, G H; Xie, H L.
Afiliación
  • Huang M; School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China.
  • Fan GH; School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China.
  • Geng L; School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China.
  • Cao GJ; School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin, 150001, P. R. China.
  • Du Y; School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China.
  • Wu H; School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China.
  • Zhang TT; School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China.
  • Kang HJ; School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116000, P. R. China.
  • Wang TM; School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116000, P. R. China.
  • Du GH; Shanghai Synchrotron Radiation Facility, Shanghai Institute of High Energy Applied Physics, Shanghai, 200000, P. R. China.
  • Xie HL; Shanghai Synchrotron Radiation Facility, Shanghai Institute of High Energy Applied Physics, Shanghai, 200000, P. R. China.
Sci Rep ; 6: 38461, 2016 12 05.
Article en En | MEDLINE | ID: mdl-27917923
Layered Ti-Al metal composite (LMC) fabricated by hot-pressing and hot-rolling process displays higher ductility than that of both components. In this paper, a combination of digital image correlation (DIC) and X-ray tomography revealed that strain delocalization and constrained crack distribution are the origin of extraordinary tensile ductility. Strain delocalization was derived from the transfer of strain partitioning between Ti and Al layer, which relieved effectively the strain localization of LMC. Furthermore, the extensive cracks of LMC were restricted in the interface due to constraint effect. Layered architecture constrained the distribution of cracks and significantly relieved the strain localization. Meanwhile, the transfer of strain partitioning and constrained crack distribution were believed to inhibit the strain localization of Ti and change the deformation mechanisms of Ti. Our finding enriches current understanding about simultaneously improving the strength and ductility by structural design.

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Rep Año: 2016 Tipo del documento: Article Pais de publicación: Reino Unido

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Rep Año: 2016 Tipo del documento: Article Pais de publicación: Reino Unido