期刊
SCRIPTA MATERIALIA
卷 89, 期 -, 页码 45-48出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2014.06.021
关键词
Neutron diffraction; Austenitic steels; Martensitic phase transformation; Low cycle fatigue; Cyclic hardening
类别
资金
- U.S. Department of Energy, Basic Energy Sciences, Scientific User Facilities Division
- China Scholarship Council
Real-time in situ neutron diffraction was performed on an austenitic stainless steel under cyclic loading at room temperature. The evolutions of individual phase stresses during martensitic transformation were derived from the lattice parameters and volume fraction based on Rietveld refinements and Hooke's law, while the phase-specific dislocation densities were elucidated by the single peak broadenings. Both results reveal that the increasing content of martensite phase, instead of individual phase strengthening, should be accounted for the remarkable secondary cyclic hardening. (C) Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
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