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ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2003.11.084
关键词
TRIP; martensite; austenitic stainless steel; co-deformation; diffraction
The strengthening that results from the low-temperature formation of strain-induced martensite in austenitic stainless steel was Studied. Specifically, the work hardening behaviour was characterized, as well as the spatial distribution of the martensite as a function of prior strain. Neutron diffraction measurements revealed the degree of elastic strain partitioning between the austenite and martensite. It was found that a sufficiently high initial dislocation density leads to a localization of the martensite transformation in the form of a Luders front. The martensite acts as an elastic reinforcing phase as it supports a higher stress than the austenite tensile loading. even though the martensite co-deforms plastically with the austenite. A model was developed that predicts the volume fraction of martensite formed as a function of plastic strain. (C) 2004 Elsevier B.V. All rights reserved.
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