A microstructural investigation on deformation mechanisms of Fe-18Cr-12Mn-0.05C metastable austenitic steels containing different amounts of nitrogen

A. Kermanpur, P. Behjati, J. Han, A. Najafizadeh, Y. K. Lee

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Deformation mechanisms of the Ni-free Fe-18Cr-12Mn-0.05C (wt%) austenitic steels containing 0, 0.25 and 0.44. N were investigated. Effects of N addition, strain and temperature on the formation of deformation-induced ε- and α'-martensite phases were determined using transmission electron microscopy and electron back-scattered diffraction techniques. Based on the microstructural evolutions, it is proposed that deformation mechanism of these steels includes the sequence of γ. →. ε-martensite. →. α'-martensite, in which the formation and stability of the ε-martensite is significantly enhanced by the N content. Increased deformation temperature from 298 to 373. K reduces the formation of ε-martensite (more than 80%).

Original languageEnglish
Pages (from-to)273-280
Number of pages8
JournalMaterials and Design
Volume82
DOIs
Publication statusPublished - 2015 Oct 5

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Austenitic steel
Martensite
Nitrogen
Steel
Microstructural evolution
Diffraction
austenitic steel
Transmission electron microscopy
Temperature
Electrons

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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title = "A microstructural investigation on deformation mechanisms of Fe-18Cr-12Mn-0.05C metastable austenitic steels containing different amounts of nitrogen",
abstract = "Deformation mechanisms of the Ni-free Fe-18Cr-12Mn-0.05C (wt{\%}) austenitic steels containing 0, 0.25 and 0.44. N were investigated. Effects of N addition, strain and temperature on the formation of deformation-induced ε- and α'-martensite phases were determined using transmission electron microscopy and electron back-scattered diffraction techniques. Based on the microstructural evolutions, it is proposed that deformation mechanism of these steels includes the sequence of γ. →. ε-martensite. →. α'-martensite, in which the formation and stability of the ε-martensite is significantly enhanced by the N content. Increased deformation temperature from 298 to 373. K reduces the formation of ε-martensite (more than 80{\%}).",
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A microstructural investigation on deformation mechanisms of Fe-18Cr-12Mn-0.05C metastable austenitic steels containing different amounts of nitrogen. / Kermanpur, A.; Behjati, P.; Han, J.; Najafizadeh, A.; Lee, Y. K.

In: Materials and Design, Vol. 82, 05.10.2015, p. 273-280.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A microstructural investigation on deformation mechanisms of Fe-18Cr-12Mn-0.05C metastable austenitic steels containing different amounts of nitrogen

AU - Kermanpur, A.

AU - Behjati, P.

AU - Han, J.

AU - Najafizadeh, A.

AU - Lee, Y. K.

PY - 2015/10/5

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AB - Deformation mechanisms of the Ni-free Fe-18Cr-12Mn-0.05C (wt%) austenitic steels containing 0, 0.25 and 0.44. N were investigated. Effects of N addition, strain and temperature on the formation of deformation-induced ε- and α'-martensite phases were determined using transmission electron microscopy and electron back-scattered diffraction techniques. Based on the microstructural evolutions, it is proposed that deformation mechanism of these steels includes the sequence of γ. →. ε-martensite. →. α'-martensite, in which the formation and stability of the ε-martensite is significantly enhanced by the N content. Increased deformation temperature from 298 to 373. K reduces the formation of ε-martensite (more than 80%).

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