Journal
SCRIPTA MATERIALIA
Volume 63, Issue 11, Pages 1057-1060Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2010.07.041
Keywords
Metastable austenitic stainless steel; Ultrafine/nanograined; Deformation; Structure
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Funding
- National Science Foundation [CMMI 0940402]
- University of Louisiana at Lafayette
- Finnish Funding Agency for Technology and Innovation (Tekes) via FIMECC Oy
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The deformation behavior of a nanograined/ultrafine-grained (NG/UFG) austenitic stainless steel characterized by high strength high ductility combination is investigated via nanoindentation and electron microscopy, and the behavior compared with its coarse-grained (CG) counterpart. In NG/UFG steel, mechanical twinning was an active deformation mechanism, while in CO steel, nucleation of strain-induced martensite at the shear bands occurred. The differences in deformation mechanisms of NG/UFG and CO steels are reflected in the discrete burst in the force displacement plots and attributed to austenite stability. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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