The Influence of (Ti, V)C Precipitation on the Mechanical Properties of High Mn TWIP Steel
High Mn twinning-induced plasticity (TWIP) steel is a potential material for use in automobile body-in-white construction due to its excellent combination of tensile strength and elongation.The relatively low yield strength of high Mn TWIP steel,however,has generated concern about passenger safety and this has consequently delayed the use of the material in practice.Among the various strategies used to enhance the yield strength,micro-alloying of the steel can be used to achieve grain size hardening and precipitation hardening by carbide formation.In this study,an in-depth microstructure analysis and mechanical properties study were carried out for hot rolled high-Mn TWIP steel,to which vanadium and titanium were added.The microstructure of the steel was characterized by electron backscattered diffraction (EBSD) and transmission electron microscopy (TEM).The presence of titanium and vanadium in the micro-alloyed TWIP steel affected the size,distribution,and composition of the precipitates.The strengthening mechanisms in the micro-alloyed TWIP steel were analyzed in detail taking into account the various microstructural contributions of the micro-alloying.The precipitation kinetics of the micro-alloying elements in high Mn TWIP steel were also analyzed by TEM.
austenitic high-Mn steel twinning-induced plasticity (TWIP) micro-alloying vanadium
GWON Hojun SHIN Sunmi DE COOMAN B.C.
Materials Design Laboratory, Graduate Institute of Ferrous Technology, Pohang University of Science and Technology, Pohang, 790-784, South Korea
国际会议
成都
英文
99-102
2016-11-16（万方平台首次上网日期，不代表论文的发表时间）