期刊
PHILOSOPHICAL MAGAZINE LETTERS
卷 95, 期 12, 页码 555-563出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09500839.2015.1122242
关键词
grain size; work hardening; solid solution; Kocks-Mecking
类别
资金
- Natural Sciences and Engineering Research Council of Canada
A modified grain size-dependent model developed to capture the combined effects of solute and grain size on the work hardening behaviour of fine-grained Cu-Ni alloys is provided. This work builds on a recent model that attributes the grain size-dependent work hardening of fine-grained Cu to backstresses. In the case of Cu-Ni alloys, unlike commercially pure Cu, a grain size-dependent separation between the Kocks-Mecking curves develops, this being explained here based on an extra contribution from geometrically necessary dislocations in the solid solution alloy. This is corroborated by strain-rate sensitivity experiments.
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