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Low Temperature Deformation Detwinning—A Reverse Mode of Twinning

✍ Scribed by Yan-Dong Wang; Wenjun Liu; Lei Lu; Yang Ren; Zhi-Hua Nie; Jonathan Almer; Sheng Cheng; Yong-Feng Shen; Liang Zuo; Peter K. Liaw; Ke Lu

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
485 KB
Volume
12
Category
Article
ISSN
1438-1656

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✦ Synopsis

Abstract

The origin of the plasticity in bulk nanocrystalline metals have, to date, been attributed to the grain‐boundary‐mediated process, stress‐induced grain coalescence, dislocation plasticity, and/or twinning. Here we report a different mechanism—detwinning, which operates at low temperatures during the tensile deformation of an electrodeposited Cu with a high density of nanosized growth twins. Both three‐dimensional XRD microscopy using the Laue method with a submicron‐sized polychromatic beam and high‐energy XRD technique with a monochromatic beam provide the direct experimental evidences for low temperature detwinning of nanoscale twins.

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