You are here

A dislocation-based, strain-gradient-plasticity strengthening model for deformation processed metal-metal composites

TitleA dislocation-based, strain-gradient-plasticity strengthening model for deformation processed metal-metal composites
Publication TypeJournal Article
Year of Publication2014
AuthorsTian, L, Russell, A, Anderson, I
JournalJournal of Materials Science
Volume49
Pagination2787-2794
Date Published04
Type of ArticleArticle
ISBN Number0022-2461
Accession NumberWOS:000330791400012
Keywordsaluminum, composites, cu-nb composites, in-situ composites, insitu, mechanical-properties, Microstructure
Abstract

Deformation processed metal-metal composites (DMMCs) are high-strength, high-electrical conductivity composites developed by severe plastic deformation of two ductile metal phases. The extraordinarily high strength of DMMCs is underestimated using the rule of mixture (or volumetric weighted average) of conventionally work-hardened metals. In this article, a dislocation-density-based, strain-gradient-plasticity model is proposed to relate the strain-gradient effect with the geometrically necessary dislocations emanating from the interface to better predict the strength of DMMCs. The model prediction was compared with the experimental findings of Cu-Nb, Cu-Ta, and Al-Ti DMMC systems to verify the applicability of the new model. The results show that this model predicts the strength of DMMCs better than the rule-of-mixture model. The strain-gradient effect, responsible for the exceptionally high strength of heavily cold worked DMMCs, is dominant at large deformation strain since its characteristic microstructure length is comparable with the intrinsic material length.

DOI10.1007/s10853-013-7982-5
Custom 1

Royalty

Custom 2

ISURF

Custom 3

ISU Electric Power Research Center