%0 Journal Article
%T Deformation behavior of duplex austenite and ¦Å-martensite high-Mn steel
%A Ki Hyuk Kwon
%A Byeong-Chan Suh
%A Sung-Il Baik
%A Young-Woon Kim
%A Jong-Kyo Choi and Nack J Kim
%J Science and Technology of Advanced Materials
%D 2013
%I Institute of Physics, National Institute for Materials Science
%X Deformation and work hardening behavior of Fe¨C17Mn¨C0.02C steel containing ¦Å-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 ¡ú ¦Å-martensite ¡ú ¦Á'-martensite as well as the direct transformation of austenite ¡ú ¦Á'-martensite. Based on the calculation of changes in the fraction of each constituent phase, we found that the phase transformation of austenite ¡ú ¦Å-martensite is more effective in work hardening than that of ¦Å-martensite ¡ú ¦Á'-martensite. Moreover, reverse transformation of ¦Å-martensite ¡ú austenite has also been observed during deformation. It originates from the formation of stacking faults within the deformed ¦Å-martensite, resulting in the formation of 6H-long periodic ordered structure.
%U http://dx.doi.org/10.1088/1468-6996/14/1/014204