Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 664, Issue -, Pages 114-125Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2016.03.016
Keywords
Microstructure; Strain softening; Micro/Meso-deformation; Ultrafine grains; Copper
Categories
Funding
- National Natural Science Foundation of China [51375111]
- National Basic Research Program of China [2012CB934100]
- Fundamental Research Funds for the Central Universities [HIT. IBRSEM. 201325]
Ask authors/readers for more resources
Pure copper was processed by equal channel angular pressing (ECAP) using route Bc with a die channel angle of 110 degrees. Electron back scattered diffraction (EBSD) and transmission electron microscopy (TEM) were used to analyze the microstructure and texture during ECAP processing and after combining ECAP with micro-compression. Ultrafine-grained pure copper with an average grain size of similar to 0.5 mu m was achieved after ECAP processing through 12 passes. The anisotropic behavior during.micro-compression is caused by the micro-texture of pure copper introduced by ECAP processing. Three kinds of strain softening behaviors are found during micro-compression tests in pure copper processed by ECAP. The strain softening of micro/meso deformation in UFG pure copper is caused by the accelerated dislocations annihilation due to the high dislocation recoveries at HAGBs, which is consistent with the deformation mechanism of grain boundary sliding and grain rotation. (C) 2016 Published by Elsevier B.V.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available