Effect of microalloying elements (Nb, V and Ti) on the hot flow behavior of high-Mn austenitic twinning induced plasticity (TWIP) steel
Effect of microalloying elements (Nb, V and Ti) on the hot flow behavior of high-Mn austenitic twinning induced plasticity (TWIP) steel
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DOI：
10.1016/j.msea.2012.09.101
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发表时间：
2013-01
期刊：
影响因子：
6.4
通讯作者：
F. Reyes-Calderón;I. Mejía;A. Boulaajaj;J. Cabrera
中科院分区：
文献类型：
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作者：
F. Reyes-Calderón;I. Mejía;A. Boulaajaj;J. Cabrera
本文研究了Nb、V、Ti等微合金化元素对高Mn奥氏体高锰钢热变形行为的影响。为此，在三个温度（900、1000和1100°C）和四个恒定应变速率（10−1、10−2、10− 3和10−4s−1）下进行了等温单轴热压缩试验。实验结果表明，微合金化铁素体钢的热流变曲线在所有试验条件下均为单峰曲线。讨论了峰值应力（σp）和峰值应变（εp）与应变速率（ε今）和温度的关系。Nb、V、Ti等微合金化元素的加入使σ p值略有增加，Ti微合金化的σ p值最高。采用电子背散射衍射技术（EBSD）对热变形后的组织进行了分析。V和Ti微合金化的铁素体钢获得了奥氏体再结晶晶粒细化的最重要结果。
This research work studies the effect of microalloying elements such as Nb, V and Ti on the hot flow behavior of high-Mn austenitic TWIP steel. For this purpose, isothermal uniaxial hot compression tests were carried out at three temperatures (900, 1000 and 1100°C) and four constant strain rates (10−1, 10−2, 10−3and 10−4s−1). Experimental results revealed that hot flow curves of microalloyed TWIP steels show single peak curves for all test conditions. Results are discussed in terms of the peak stress (σp) and peak strain (εp) and its dependence on the strain rate (ε̇) and temperature. The addition of microalloying elements such as Nb, V and Ti in TWIP steels generates a slight increase in the σpvalue, and Ti microalloyed TWIP steel exhibits the highest σpvalue. Hot deformed microstructures were analyzed by the Electron Back-Scattering Diffraction Technique (EBSD). The most important results of the austenitic recrystallized grain refinement were obtained for V and Ti microalloyed TWIP steels.