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首页> 外文期刊>International Journal of Plasticity >High strength Fe-Mn-(Al, Si) TRIP/TWIP steels development - properties - application
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High strength Fe-Mn-(Al, Si) TRIP/TWIP steels development - properties - application

机译：高强度Fe-Mn-（Al，Si）TRIP / TWIP钢的发展-性能-应用

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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. [References: 22]
机译：研究了添加铝和硅的奥氏体Fe-（15-30）％Mn钢的变形孪晶，马氏体相变和力学性能。众所周知，铝的添加会增加堆垛层错能γ（fcc），因此会强烈抑制γ→ε转换，而硅会降低γ（fcc）并维持γ→ε转换。伽马->ε相变发生在伽马（fcc）小于或等于20 mJ / m（2）的钢中。对于具有较高堆垛力的钢，故障孪生是主要的变形机理。在不同的应变速率和温度下进行拉伸测试。通过光学显微镜，X射线衍射，扫描电子显微镜（SEM）和透射电子显微镜（TEM）分析了塑性变形过程中孪晶，α-和ε-马氏体的形成。开发的轻质高锰TRIP（“转变诱导塑性”）和TWIP（“孪生诱导塑性”）钢即使在极高的应变速率下也表现出高的流变应力（600-1100 MPa）和极高的伸长率（60-95％）约为10（3）s（-1）。汽车工业中朝着提高安全标准，减轻重量以及更合理和更具成本效益的制造的最新趋势，引起了人们对这些高强度和“超韧性”钢的极大兴趣。 （C）2000 Elsevier ScienceLtd。保留所有权利。 [参考：22]

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