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- Title
Determining the Stress Required for Deformation Twinning in Nanocrystalline and Ultrafine-grained Copper.
- Authors
Sriram, Vinay; Jenn-Ming Yang; Jia Ye; Minor, Andrew M.
- Abstract
Deformation twinning in nanocrystalline and ultrafine-grained materials has attracted much attention in recent years due to the ability of a high density of twin boundaries to dramatically improve mechanical properties such as yield strength and ductility. Various processing conditions such as ball milling, cryomilling, electrodeposition, and equi-channel angular extrusion have been used to form deformation twins in metals. Most techniques for estimating the shear stress needed to form deformation twins are based indirectly on the processing conditions. Here, a new method to directly measure the shear stress needed to form twin boundaries through in-situ transmission electron microscopy nanocompression testing will be described.
- Subjects
STRAINS &; stresses (Mechanics); TWINNING (Crystallography); NANOCRYSTALS; CRYSTAL defects; CRYSTAL grain boundaries; SHEAR (Mechanics); METAL crystals; COPPER crystals
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2008, Vol 60, Issue 9, p66
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-008-0121-0