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首页> 外文期刊>Materials Science and Engineering >Evolution of microstructure and deformation behavior in Al-Ni added medium-Mn steel processed through intercritical / cold rolling and annealing
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Evolution of microstructure and deformation behavior in Al-Ni added medium-Mn steel processed through intercritical / cold rolling and annealing

机译：通过临界/冷轧和退火加工Al-Ni加入的中研料中微观结构和变形行为的演变

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摘要

In the present work, the effect of intercritical annealing on Fe-8Mn-4Al-3.5Ni-0.8Si-0.25C (wt.%) medium-Mn steel, processed through two different processing routes viz. intercritical rolling (IR) and cold rolling (CR), has been studied. The microstructure, mechanical properties, austenite stability and deformation behavior of the steel, after intercritical annealing (IA) at different temperatures (760, 800 and 840 °C), has been investigated. It has been observed that different rolling regimes (intercritical rolling and cold rolling) give rise to distinct variation in the grain structure owing to different recrystallization behavior during intercritical annealing. The IR-annealed samples showed a mixture of lath and equiaxed grains while the CR-annealed samples showed mostly equiaxed grain morphology. Due to extensive recrystallization in CR-annealed samples, a higher fraction of retained austenite was formed, as compared to IR-annealed samples. The yield strength (YS) and ultimate tensile strength (UTS) was found to be higher for IR-annealed samples, as compared to CR-annealed samples, at all annealing temperatures. However, a high elongation (EL) of 57 % with (UTS x %E1) product of 47.7 GPa% was obtained in CR sample, annealed at 800 1C. The mechanical stability of retained austenite was found to influence the work hardening behavior of the annealed samples. The CR-annealed samples exhibited strain-induced transformation to a'-martensite, as compared to e-martensite transformation in IR-annealed samples. A sustained three-stage strain hardening behavior during deformation, comprising combined TWIP and discontinuous TRIP effect, led to excellent strength-ductility combination in CR sample annealed at 800 °C.
机译：在本作工作中，通过两种不同的加工路线Viz处理跨临界退火对Fe-8mN-4AL-3.5NI-0.8SI-0.25C-0.25C-0.25C-0.25C-0.25C（WT.％）中-MN钢的影响。研究了跨临界轧制（IR）和冷轧（CR）。研究了不同温度（760,800和840℃）的跨临界退火（IA）后钢的微观结构，机械性能，奥氏体稳定性和变形行为。已经观察到，由于在跨临界退火期间，不同的轧制制度（跨临界轧制和冷轧）产生了由于不同的重结晶行为而导致晶粒结构的不同变化。 IR退火的样品显示出板条和等式颗粒的混合物，而Cr-退火样品显示出大多是等式的晶粒形态。由于CR-退火样品中的广泛重结晶，与IR-退火样品相比，形成更高的保留奥氏体。与Cr-退火样品相比，发现屈服强度（ys）和最终的拉伸强度（UTS）对所有退火的样品相比，在所有退火温度下相比。然而，在Cr样品中获得47.7GPa％的（UTS X％E1）产物的高伸长率（EL）为57％，在CR样品中获得，在800℃退火。发现保留奥氏体的机械稳定性影响退火样品的硬化行为。与IR-退火样品中的E-马氏体转化相比，Cr-退火样品表现出对A'-马氏体的转化。变形期间的持续的三级应变硬化行为，包括组合的Twip和不连续的跳闸效果，导致Cr样品中的优异强度 - 延展性组合在800℃下退火。

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  • 来源
    《Materials Science and Engineering》 |2021年第8期|141852.1-141852.14|共14页
  • 作者

    Biraj Kumar Sahoo; Vikas Chandra Srivastava; Avanish Kumar Chandan; Harpreet Singh Chhabra; Sandip Ghosh Chowdhury;

  • 作者单位

    Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India Materials Engineering Division CSIR National Metallurgical Laboratory Jamshedpur 831007 India;

    Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India Materials Engineering Division CSIR National Metallurgical Laboratory Jamshedpur 831007 India;

    Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India Materials Engineering Division CSIR National Metallurgical Laboratory Jamshedpur 831007 India;

    Department of Metallurgical Engineering Birsa Institute of Technology (B.I.T) Sindri 828123 India;

    Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India Materials Engineering Division CSIR National Metallurgical Laboratory Jamshedpur 831007 India;

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  • 正文语种 eng
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  • 关键词

    Intercritical rolling; Cold rolling; Intercritical annealing; Medium Mn steel; Retained austenite;

    机译：跨临界轧制;冷轧;跨临界退火;中锰钢;保留奥氏体;

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