Effects of Si on tensile properties associated with deformation-induced ε-martensitic transformation in high Mn austenitic alloys

Motomichi Koyama, Takahiro Sawaguchi, Kaneaki Tsuzaki

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We investigated the effect of Si on the tensile properties of Fe-33Mn, Fe-33Mn-4Si, and Fe-33Mn-6Si austenitic alloys (mass%) at 273, 294, 323, and 423 K. The Si addition promoted the deformation-induced ε-martensitic transformation, thereby enhancing the work-hardening capacity. In terms of Considère's criterion, the enhanced work-hardening capacity can improve uniform elongation. However, the Si addition simultaneously promoted brittle cracking associated with ε-martensite, tending toward decreasing elongation. As a result of the ambivalent roles of Si related to ε-martensite, the elongation-strength balance was improved by the addition of 4%Si, but was deteriorated when the Si content increased to 6%. As an additional effect, the Si addition changed the microvoid-formation behavior, resulting in decreasing local elongations.

Original languageEnglish
Pages (from-to)657-663
Number of pages7
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume79
Issue number12
DOIs
Publication statusPublished - Jan 1 2015

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tensile properties
Martensitic transformations
martensitic transformation
Tensile properties
elongation
Elongation
work hardening
martensite
Strain hardening
Martensite

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

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title = "Effects of Si on tensile properties associated with deformation-induced ε-martensitic transformation in high Mn austenitic alloys",
abstract = "We investigated the effect of Si on the tensile properties of Fe-33Mn, Fe-33Mn-4Si, and Fe-33Mn-6Si austenitic alloys (mass{\%}) at 273, 294, 323, and 423 K. The Si addition promoted the deformation-induced ε-martensitic transformation, thereby enhancing the work-hardening capacity. In terms of Consid{\`e}re's criterion, the enhanced work-hardening capacity can improve uniform elongation. However, the Si addition simultaneously promoted brittle cracking associated with ε-martensite, tending toward decreasing elongation. As a result of the ambivalent roles of Si related to ε-martensite, the elongation-strength balance was improved by the addition of 4{\%}Si, but was deteriorated when the Si content increased to 6{\%}. As an additional effect, the Si addition changed the microvoid-formation behavior, resulting in decreasing local elongations.",
author = "Motomichi Koyama and Takahiro Sawaguchi and Kaneaki Tsuzaki",
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T1 - Effects of Si on tensile properties associated with deformation-induced ε-martensitic transformation in high Mn austenitic alloys

AU - Koyama, Motomichi

AU - Sawaguchi, Takahiro

AU - Tsuzaki, Kaneaki

PY - 2015/1/1

Y1 - 2015/1/1

N2 - We investigated the effect of Si on the tensile properties of Fe-33Mn, Fe-33Mn-4Si, and Fe-33Mn-6Si austenitic alloys (mass%) at 273, 294, 323, and 423 K. The Si addition promoted the deformation-induced ε-martensitic transformation, thereby enhancing the work-hardening capacity. In terms of Considère's criterion, the enhanced work-hardening capacity can improve uniform elongation. However, the Si addition simultaneously promoted brittle cracking associated with ε-martensite, tending toward decreasing elongation. As a result of the ambivalent roles of Si related to ε-martensite, the elongation-strength balance was improved by the addition of 4%Si, but was deteriorated when the Si content increased to 6%. As an additional effect, the Si addition changed the microvoid-formation behavior, resulting in decreasing local elongations.

AB - We investigated the effect of Si on the tensile properties of Fe-33Mn, Fe-33Mn-4Si, and Fe-33Mn-6Si austenitic alloys (mass%) at 273, 294, 323, and 423 K. The Si addition promoted the deformation-induced ε-martensitic transformation, thereby enhancing the work-hardening capacity. In terms of Considère's criterion, the enhanced work-hardening capacity can improve uniform elongation. However, the Si addition simultaneously promoted brittle cracking associated with ε-martensite, tending toward decreasing elongation. As a result of the ambivalent roles of Si related to ε-martensite, the elongation-strength balance was improved by the addition of 4%Si, but was deteriorated when the Si content increased to 6%. As an additional effect, the Si addition changed the microvoid-formation behavior, resulting in decreasing local elongations.

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