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

Chan Soo Yoo; Yong Min Park; Yeon Seung Jung; Young Kook Lee

doi:10.1016/j.scriptamat.2008.02.024

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

Chan Soo Yoo, Yong Min Park, Yeon Seung Jung, Young Kook Lee

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

47 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	71-74
Number of pages	4
Journal	Scripta Materialia
Volume	59
Issue number	1
DOIs	https://doi.org/10.1016/j.scriptamat.2008.02.024
Publication status	Published - 2008 Jul

Bibliographical note

Funding Information:
This work was supported by the Agency for Defense Development under the Contract UD060017AD and by the National Core Research Center Program from MOST and KOSEF (R15-2006-022-01002-0).

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2008.02.024

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abstract = "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.",

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AU - Park, Yong Min

AU - Jung, Yeon Seung

AU - Lee, Young Kook

N1 - Funding Information: This work was supported by the Agency for Defense Development under the Contract UD060017AD and by the National Core Research Center Program from MOST and KOSEF (R15-2006-022-01002-0).

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N2 - 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.

AB - 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.

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

Abstract

Bibliographical note

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