Deformation behavior of duplex austenite and ε-martensite high-Mn steel

نویسندگان

  • Ki Hyuk Kwon
  • Byeong-Chan Suh
  • Sung-Il Baik
  • Young-Woon Kim
  • Jong-Kyo Choi
  • Nack J Kim
چکیده

Deformation and work hardening behavior of Fe-17Mn-0.02C steel containing ε-martensite within the austenite matrix have been investigated by means of in situ microstructural observations and x-ray diffraction analysis. During deformation, the steel shows the deformation-induced transformation of austenite → ε-martensite → α'-martensite as well as the direct transformation of austenite → α'-martensite. Based on the calculation of changes in the fraction of each constituent phase, we found that the phase transformation of austenite → ε-martensite is more effective in work hardening than that of ε-martensite → α'-martensite. Moreover, reverse transformation of ε-martensite → austenite has also been observed during deformation. It originates from the formation of stacking faults within the deformed ε-martensite, resulting in the formation of 6H-long periodic ordered structure.

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عنوان ژورنال:

دوره 14  شماره 

صفحات  -

تاریخ انتشار 2013