Extra strengthening in a coarse/ultrafine grained laminate : Role of gradient interfaces

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Y. F. Wang
  • M. S. Wang
  • X. T. Fang
  • F. J. Guo
  • H. Q. Liu
  • R. O. Scattergood
  • C. X. Huang

Detail(s)

Original languageEnglish
Pages (from-to)196-207
Journal / PublicationInternational Journal of Plasticity
Volume123
Online published30 Jul 2019
Publication statusPublished - Dec 2019
Externally publishedYes

Abstract

The interfaces introduced in metals by heterostructural design play crucial roles in mechanical behaviors. Here the effect of gradient interfaces on mechanical behavior was investigated in a laminated Cu-30Zn sample composed of coarse-grained and ultrafine-grained layers. Tensile tests revealed a superior strength-ductility synergy with extraordinary strengthening and work hardening. By combining the measurements of height contour and strain distribution using digital image correlation, the development of strain gradient was detected in the near-interface zone during tension, which was caused by the mechanical incompatibilities across interfaces and the synergetic constraint between layers. The intensity of strain gradient in the near-interface zone increased with tensile strain, which was accommodated by the accumulation of geometrically necessary dislocations, thereby resulting in extra back stress and dislocation strengthening.

Research Area(s)

  • Geometrically necessary dislocation (GND), Gradient interface, Heterogeneous structure, Strain gradient, Synergetic strengthening

Citation Format(s)

Extra strengthening in a coarse/ultrafine grained laminate : Role of gradient interfaces. / Wang, Y. F.; Wang, M. S.; Fang, X. T.; Guo, F. J.; Liu, H. Q.; Scattergood, R. O.; Huang, C. X.; Zhu, Y. T.

In: International Journal of Plasticity, Vol. 123, 12.2019, p. 196-207.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review