Effects of Deformation-Induced Twinning and Martensitic Transformation on the Cryogenic Mechanical Properties of Fe-19Mn-5Cr-(0-5)Al-0.2C Alloys

  • B. W. Oh
  • S. J. Cho
  • S. H. Hong
  • Y. G. Kim
  • W. J. Kim
  • Y. P. Kim
Part of the An International Cryogenic Materials Conference Publication book series (ACRE, volume 40)


The microstructures and cryogenic mechanical properties of Fe-19Mn-5Cr-(0,3,5)A10.2C alloys have been investigated from room temperature to 77 K. Addition of Al greatly increased austenite stability against ε martensite transformation. The fully austenitic Fe19Mn-5Cr-3A1-0.2C alloy showed a UTS of 1120MPa and high elongations of about 75% at both RT and 77 K, due to the formation of strain-induced deformation twins during tensile testing. The alloy also exhibited a high impact energy of 160 J at 77 K.


Stack Fault Energy Deformation Twin High Elongation High Impact Energy Epsilon Martensite 
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Copyright information

© Springer Science+Business Media New York 1994

Authors and Affiliations

  • B. W. Oh
    • 1
  • S. J. Cho
    • 1
  • S. H. Hong
    • 1
  • Y. G. Kim
    • 1
  • W. J. Kim
    • 2
  • Y. P. Kim
    • 2
  1. 1.Dept. of Materials Science and EngineeringKorea Advanced Institute of Science and TechnologyTaejonKorea
  2. 2.R&D CenterKorea Gas CorporationAnsanKorea

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