Low temperature deformation detwinning - a reverse mode of twinning.

Journal Article · Fri Jan 01 00:00:00 EST 2010 · Adv. Eng. Mater.

DOI:https://doi.org/10.1002/adem.201000123· OSTI ID:1019263

Wang, Y D; Liu, W; Lu, L; Ren, Y; Nie, Z H; Almer, J; Cheng, S; Shen, Y F; Zuo, L; Liaw, P K; Lu, K ^[1]

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1. X-Ray Science Division

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.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC); National Science Foundation (NSF); National Natural Science Foundation of China (NNSFC)
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 1019263
• Report Number(s): ANL/XSD/JA-70543; AENMFY; TRN: US201114%%733
• Journal Information: Adv. Eng. Mater., Vol. 12, Issue 9 ; 2010; ISSN 1438-1656
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
COALESCENCE
DEFORMATION
DISLOCATIONS
LAUE METHOD
MICROSCOPY
ORIGIN
PLASTICITY
TWINNING
X-RAY DIFFRACTION