TY - GEN
T1 - Deformation behavior and microstructure of low carbon high manganese steels in tensile strain
AU - Wang, Lu Lu
AU - Li, Guang Xin
AU - Ma, Xin Pei
AU - Jiang, Feng
AU - Sun, Jun
PY - 2009
Y1 - 2009
N2 - The mechanical properties of two high manganese steels with manganese contents (15% and 25%) were investigated during tensile tests at room temperature. The results indicated that the strengths of steels were a little low and the elongations were improved greatly with increasing the manganese content. Stress fluctuations were found during tensile tests of the Fe-15Mn steels, and as the strain increased the range of stress fluctuations became wider. The strain hardening exponent n of samples changed with strain in a parabola model. The microstructures before and after deformation were investigated and the results showed that phase transformation of γ (fcc) →ε (hcp) and γ (fcc) →ε (hcp) →α (bcc) induced plasticity occurred in the Fe-15Mn steels. However, in the Fe-25Mn steels, at the beginning stage of the deformation, phase transformation induced plasticity played an important role, and with the increase of deformation, the main mechanism was twinning induced plasticity.
AB - The mechanical properties of two high manganese steels with manganese contents (15% and 25%) were investigated during tensile tests at room temperature. The results indicated that the strengths of steels were a little low and the elongations were improved greatly with increasing the manganese content. Stress fluctuations were found during tensile tests of the Fe-15Mn steels, and as the strain increased the range of stress fluctuations became wider. The strain hardening exponent n of samples changed with strain in a parabola model. The microstructures before and after deformation were investigated and the results showed that phase transformation of γ (fcc) →ε (hcp) and γ (fcc) →ε (hcp) →α (bcc) induced plasticity occurred in the Fe-15Mn steels. However, in the Fe-25Mn steels, at the beginning stage of the deformation, phase transformation induced plasticity played an important role, and with the increase of deformation, the main mechanism was twinning induced plasticity.
KW - Low carbon high manganese steels
KW - Transformation induced plasticity
KW - Twinning induced plasticity
UR - https://www.scopus.com/pages/publications/70349431456
U2 - 10.4028/www.scientific.net/MSF.620-622.335
DO - 10.4028/www.scientific.net/MSF.620-622.335
M3 - 会议稿件
AN - SCOPUS:70349431456
SN - 0878493271
SN - 9780878493272
T3 - Materials Science Forum
SP - 335
EP - 338
BT - 10th International Symposium on Eco-Materials Processing and Design, ISEPD 2009
PB - Trans Tech Publications Ltd
T2 - 10th International Symposium on Eco-Materials Processing and Design, ISEPD 2009
Y2 - 13 January 2009 through 15 January 2009
ER -