Continuous dynamic recrystallization of AISI 430 ferritic stainless steel

The high-temperature deformation behavior of AISI 430 ferritic stainless steel was studied by torsion tests. The deformation tests were performed in the temperature range of 900–1100°C and strain rate range of 5.0×10−2 −5.0/sec. The evolutions of flow stress and microstructure show the characteristi...

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Bibliographic Details
Published inMetals and materials international Vol. 8; no. 1; pp. 7 - 13
Main Authors Kim, Sung-Il, Yoo, Yeon-Chul
Format Journal Article
LanguageEnglish
Published Seoul Springer Nature B.V 01.02.2002
Subjects
Deformation
Dynamic recrystallization
Ferritic stainless steel
Ferritic stainless steels
Flow stress
Grain boundaries
Grain size
Heat resistant steels
High temperature
Misalignment
Misorientation
Strain
Strain rate
Temperature dependence
Torsion tests
Yield strength
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Summary:The high-temperature deformation behavior of AISI 430 ferritic stainless steel was studied by torsion tests. The deformation tests were performed in the temperature range of 900–1100°C and strain rate range of 5.0×10−2 −5.0/sec. The evolutions of flow stress and microstructure show the characteristics of continuous dynamic recrystallization (CDRX). The flow stress gradually decreased with strain over the peak stress without steady state. Below the 100% effective strain, grains appeared in small angle grain boundaries with a misorientation of 3–9°. In addition, when heavy deformation (>300%) was applied, higher misorientation (∼15°) was achieved. The tendency of CDRX increased with increasing strain rate and decreasing temperature. The dependence of CDRX grain size on the strain rate and temperature was discussed.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1598-9623
2005-4149
DOI:10.1007/BF03027023