TY - JOUR
T1 - Effect of deformation temperature on tensile properties in a pre-cooled Fe-Mn-C austenitic steel
AU - Koyama, Motomichi
AU - Sawaguchi, Takahiro
AU - Tsuzaki, Kaneaki
N1 - Funding Information:
M.K. acknowledges the Research Fellowship of NIMS Junior Researcher (2009–2010) and the Japan Society for the Promotion of Science for Young Scientists (2011). The Materials Manufacturing and Engineering Station and the Materials Analysis Station at the National Institute for Materials Science supported this work through the production of the samples and by carrying out analysis of the chemical compositions.
PY - 2012/10/30
Y1 - 2012/10/30
N2 - We investigated the tensile deformation behavior of a Fe-17Mn-0.3C (wt%) steel containing thermally-induced HCP-martensite that was formed by cooling to 77. K beforehand from various temperatures. In the temperature range where deformation-induced HCP→FCC reverse transformation and deformation twinning occur, the yield strength was enhanced by the pre-existing HCP-martensite, and the brittle cracking associated with the HCP-martensite was suppressed by the deformation-induced HCP→FCC reverse transformation after yielding. Additionally, the work hardening was sustained by deformation twinning. As a result, the yield and flow stresses were enhanced without any loss in elongation at the specific temperatures that were used in this study.
AB - We investigated the tensile deformation behavior of a Fe-17Mn-0.3C (wt%) steel containing thermally-induced HCP-martensite that was formed by cooling to 77. K beforehand from various temperatures. In the temperature range where deformation-induced HCP→FCC reverse transformation and deformation twinning occur, the yield strength was enhanced by the pre-existing HCP-martensite, and the brittle cracking associated with the HCP-martensite was suppressed by the deformation-induced HCP→FCC reverse transformation after yielding. Additionally, the work hardening was sustained by deformation twinning. As a result, the yield and flow stresses were enhanced without any loss in elongation at the specific temperatures that were used in this study.
KW - Austenitic steel
KW - Deformation-induced reverse transformation
KW - High Mn steel
KW - Martensitic transformation
KW - Twinning
KW - Twinning-induced plasticity
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U2 - 10.1016/j.msea.2012.06.095
DO - 10.1016/j.msea.2012.06.095
M3 - Article
AN - SCOPUS:84865419434
SN - 0921-5093
VL - 556
SP - 331
EP - 336
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
ER -