High strength Fe-Mn-(Al, Si) TRIP/TWIP steels development -: properties -: application
High strength Fe-Mn-(Al, Si) TRIP/TWIP steels development -: properties -: application
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DOI：
10.1016/s0749-6419(00)00015-2
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发表时间：
2000-01-01
影响因子：
9.8
通讯作者：
Meyer, LW
中科院分区：
文献类型：
--
作者：
Grässel, O;Krüger, L;Meyer, LW
研究了添加铝和硅的Fe-(15-30)wt.%Mn奥氏体钢的形变孪晶、马氏体相变和力学性能。铝的加入增加了层错能伽马(Fcc)，从而强烈地抑制了伽马--gt；epsilon相变，而硅的加入降低了-gt；-epsilon相变，维持了-gt；epsilon相变。在伽马(Fcc)小于或等于20mJ/m(2)的钢中发生-gt；-epsilon相变。对于层错能较高的钢，孪生是主要的变形机制。在不同的应变率和温度下进行了拉伸试验。用光学显微镜、X射线衍射仪、扫描电子显微镜和透射电子显微镜分析了塑性变形过程中孪晶、α-马氏体和β-马氏体的形成过程。所开发的轻质高锰TRIP(“相变诱发塑性”)和TWIP(“孪生诱发塑性”)钢即使在约10(3)S(-1)的极高应变速率下也具有高的流动应力(600-1100 Mpa)和极大的延伸率(60-95%)。最近汽车行业朝着提高安全标准、减轻重量以及制造更合理和更具成本效益的方向发展的趋势，使人们对这些高强度和超韧性的钢产生了极大的兴趣。(C)2000爱思唯尔科学有限公司。保留所有权利。
Deformation twinning, martensitic phase transformation and mechanical properties of austenitic Fe-(15-30) wt.%Mn steels with additions of aluminium and silicon have been investigated. It is known that additions of aluminium increase the stacking fault energy gamma(fcc) and therefore strongly suppress the gamma --> epsilon transformation while silicon decrease gamma(fcc) and sustains the gamma --> epsilon transformation. The gamma --> epsilon phase transformation takes place in steels with gamma(fcc) less than or equal to 20 mJ/m(2). For steels with higher stacking fault energy twinning is the main deformation mechanism. Tensile tests were carried out at different strain rates and temperatures. The formation of twins, alpha- and epsilon- martensite during plastic deformation was analysed by optical microscopy, X-ray diffraction, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The developed light weight high manganese TRIP ("transformation induced plasticity") and TWIP ("twinning induced plasticity") steels exhibit high flow stress (600-1100 MPa) and extremely large elongation (60-95%) even at extremely high strain rates of about 10(3) s(-1). Recent trends in the automotive industry towards improved safely standards and a reduced weight as well as a more rational and cost effective manufacturing have led to great interest in these high strength and "super tough" steels. (C) 2000 Elsevier Science Ltd. All rights reserved.