articleNature MaterialsApr 11, 2024HYBRID OA

Harnessing instability for work hardening in multi-principal element alloys

BXBowen XuHDHuichao DuanXCXuefei ChenJWJing WangYMYan Ma

Chinese Academy of Sciences · Institute of Mechanics · +4 more institutions

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Abstract

The strength-ductility trade-off has long been a Gordian knot in conventional metallic structural materials and it is no exception in multi-principal element alloys. In particular, at ultrahigh yield strengths, plastic instability, that is, necking, happens prematurely, because of which ductility almost entirely disappears. This is due to the growing difficulty in the production and accumulation of dislocations from the very beginning of tensile deformation that renders the conventional dislocation hardening insufficient. Here we propose that premature necking can be harnessed for work hardening in a VCoNi multi-principal element alloy. Lüders banding as an initial tensile response induces the ongoing…

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Topics & keywords

Topics
Keywords
  • Materials science
  • Work hardening
  • Instability
  • Work (physics)
  • Hardening (computing)
  • Nanotechnology
  • Metallurgy
  • Mechanical engineering
UN Sustainable Development Goals
  • Life in Land
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