Martensitic transformation of an austenitic stainless steel under non-proportional cyclic loading

Yajing Li, Dunji Yu, Bingbing Li, Xu Chen

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

In this study, a series of cyclic tests on a 304L stainless steel with different loading paths were conducted. It revealed that as the non-proportionality of loading path increased, the growth rate of martensitic content became higher and its distribution among the austenitic matrix appeared more uniform. A phase transformation kinetics equation was modified to describe the effect of cumulative plastic strain, loading amplitude and loading path on martensitic transformation. A stress decomposition rule was proposed to incorporate both the non-proportional hardening and martensitic transformation hardening to describe the hardening mechanism.

Original languageEnglish
Pages (from-to)338-347
Number of pages10
JournalInternational Journal of Fatigue
Volume124
DOIs
StatePublished - Jul 2019
Externally publishedYes

Funding

The authors gratefully acknowledge financial support for this work from the National Key Research and Development Program of China (No. 2017YFC0805600 ) and the National Natural Science Foundation of China (No. 51435012 ).

Keywords

  • Martensitic transformation
  • Metastable austenitic stainless steels
  • Non-proportional cyclic loading
  • Non-proportionality of loading path

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