Journal
SCRIPTA MATERIALIA
Volume 136, Issue -, Pages 59-63Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2017.04.011
Keywords
Nanotwins; Fatigue; Structural stability; Austenitic steel
Categories
Funding
- National Natural Science Foundation [51371172, 51501191]
- Doctoral Initiation Foundation of Liaoning Province [201501042]
- Shenyang National Laboratory for Materials Science, IMR, CAS [Y4N16F3161]
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The fatigue damage behavior of a novel nanotwinned stainless steel consisting of nanotwinned austenitic grains, nanograins and dislocation structures was investigated. It is found that the nanotwinned grains can effectively suppress the generation of persistent-slip-bands-like shear bands and nucleation of fatigue cracks in comparison with the other two deformed regions. Such better fatigue damage resistance of nanotwinned grains is mainly ascribed to the higher microstructural stability of them without obviously structural coarsening. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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