Effects of rare earth addition on microstructure and mechanical properties of a Fe–15Mn–1.5Al–0.6C TWIP steel
Effects of rare earth addition on microstructure and mechanical properties of a Fe–15Mn–1.5Al–0.6C TWIP steel
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DOI：
10.1016/j.msea.2014.04.084
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发表时间：
2014-07
期刊：
影响因子：
6.4
通讯作者：
Yangyang Zhao;Junfeng Wang;Shu-zhu Zhou;Xiaodong Wang
中科院分区：
文献类型：
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作者：
Yangyang Zhao;Junfeng Wang;Shu-zhu Zhou;Xiaodong Wang
研究了Fe-15 Mn-1.5Al-0.6C铁素体不锈钢中添加和不添加稀土的显微组织和力学性能。稀土合金化钢的抗拉强度和总延伸率（TEL）均有所提高。光学显微镜和电子背散射衍射（EBSD）表征表明，稀土合金钢具有更均匀的组织和更大比例的大角度晶界，这增加了TEL。EBSD和透射电镜分析表明，稀土合金化钢的退火孪晶分布更加均匀，部分晶粒中出现了厚度为10-20 nm的二次退火孪晶，从而提高了抗拉强度。
The microstructure and mechanical properties of a Fe–15Mn–1.5Al–0.6C TWIP steel with and without rare earth (RE) addition were investigated. The RE-alloyed steel showed both improved tensile strength and total elongation (TEL). Optical microscopy and electron back-scattered diffraction (EBSD) characterizations showed that the RE-alloyed steel possessed a more homogeneous microstructure and a larger fraction of high-angle grain boundaries, which increased the TEL. Meanwhile, EBSD and transmission electron microscope (TEM) analyses indicated that the RE-alloyed steel exhibited more uniform distributed annealing twins and secondary annealing twins with a thickness of 10–20 nm appeared in some grains, which resulted in the higher tensile strength.