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In-situ neutron diffraction analysis on deformation behavior of duplex high Mn steel containing austenite and ?-martensite |
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| Authors: | Ki Hyuk Kwon Jae Suk Jeong Jong-Kyo Choi Yang Mo Koo Yo Tomota Nack J Kim |
| Affiliation: | 1. Graduate Institute of Ferrous Technology, POSTECH, Pohang, 790-784, Korea 2. Department of Materials Science and Engineering, POSTECH, Pohang, 790-784, Korea 3. Plate Research Group, Technical Research Laboratories, POSCO, Pohang, 790-785, Korea 4. Institute of Applied Beam Science, Graduate School of Science and Engineering, Ibaraki University, Ibaraki, 316-8511, Japan |
| Abstract: | The deformation behavior of Fe-17Mn-0.02C steel containing ?-martensite within austenite matrix has been investigated via in-situ neutron diffraction study at 298 K and 77 K. Based on the analyses of changes in phase fraction and lattice strain, it has been shown that the steel shows the deformation-induced phase transformation of austenite ?? ?-martensite ?? ????-martensite and the direct transformation of austenite ?? ????-martensite at both temperatures. However, the kinetics of such transformations vary with temperature, resulting in a higher and more persistent work hardening at 77 K than at 298 K. |
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