Effect of grain size on transformation-induced plasticity in an ultrafine-grained metastable austenitic steel

The stress–strain curves and temperature change of ultrafine-grained (UFG) austenitic steels with different grain sizes were measured during uniaxial tensile testing. The uniform stress–strain and temperature change curves are divided into three different regions depending on the hardening mechanism...

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Bibliographic Details
Published inScripta materialia Vol. 59; no. 1; pp. 71 - 74
Main Authors Yoo, Chan-Soo, Park, Yong-Min, Jung, Yeon-Seung, Lee, Young-Kook
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.07.2008
Subjects
Austenitic stainless steels
Grain size
Hardening
Internal energy
Martensite
Metastable austenite
Reverse transformation
Steels
Stored energy
Strain-induced martensite
Stress strain curves
Stress-strain relationships
Grain size
Metastable austenite
Reverse transformation
Strain-induced martensite
Stored energy
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Summary:The stress–strain curves and temperature change of ultrafine-grained (UFG) austenitic steels with different grain sizes were measured during uniaxial tensile testing. The uniform stress–strain and temperature change curves are divided into three different regions depending on the hardening mechanisms. The strain-induced martensite in the UFG steels provides extra-strain hardening, large ductility and slower temperature increase. The critical stored energy for the formation of the strain-induced martensite is measured as a function of austenite grain size.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2008.02.024