Journal
SCRIPTA MATERIALIA
Volume 207, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2021.114313
Keywords
Nanotwins; Fatigue; Austenitic steel, Martensitic transformation
Categories
Funding
- National Natural Science Foundation [51771196, 91963110, 52101162]
- National Key R&D Program of China [2017YFA0204401, 2017YFA0204402]
- Shenyang National Laboratory for Materials Science, IMR, CAS [Y9SL3036L]
Ask authors/readers for more resources
The study revealed that the activation of alpha\prime-martensitic transformation in nanotwinned 316L stainless steel can enhance both fatigue strength and fatigue life in the low-cycle regime by effectively releasing stress/strain localization.
We investigated the low-cycle fatigue behavior of a novel nanotwinned 316L stainless steel consisting of nanotwinned austenitic grains embedded in the matrix with characteristic dislocation arrangements. We excitingly found that the alpha\prime-martensitic transformation is activated traversing twin lamellae to undertake the localized deformation of nanotwinned grains at high strain amplitudes. These alpha\prime-Ymartensite nuclei are mainly originated from the intersections between zigzag slip bands and twin lamellae. Thanks to the effective release of stress/strain localization by the alpha\prime-martensitic transformation within nanotwins, the fatigue strength and fatigue life in the low-cycle regime are simultaneously enhanced. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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
Share Paper
