期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2013.04.075
关键词
Severe plastic deformation; Steel; Twinning; De-twinning; Transmission electron microscopy
类别
资金
- Australian Microscopy & Microanalysis Research Facility node at the University of Sydney
- Australian Research Council [DP120100510]
- National Science Foundation of the United States [DMR-1160966, DMR-1104667]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1160966] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1104667] Funding Source: National Science Foundation
We report a de-twinning process via secondary twinning in face-centred cubic structures with low stacking fault energies. A duplex stainless steel was deformed using high-pressure torsion. Primary twins with an average twin boundary (TB) spacing of similar to 7 nm formed in the early stages of the deformation and this was followed by secondary twinning. The partial dislocations from the secondary twinning subsequently interacted with the primary TBs, leading to the de-twinning of the primary twins. As a result of the de-twinning process, the secondary twins with an average TB spacing of similar to 1.7 nm reached a maximum length of similar to 200 nm. (C) 2013 Elsevier B.V. All rights reserved.
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