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A constitutive model of the deformation behaviour of twinning induced plasticity (TWIP) steel at different temperatures

机译：孪生感应塑性（TWIP）钢在不同温度下的变形行为本构模型

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摘要

The mechanical behaviour of Fe-18Mn-0.6C-1Al (wt%) TWIP steel was modelled in the temperature range from room temperature to 400℃. The proposed constitutive model was based on the Kocks-Mecking-Estrin (KME) model. The model parameters were determined using extensive experimental measurements of the physical parameters such as the dislocation mean free path and the volume fraction of twinned grains. More than 100 grains with a total area of ～300 μm~ 2 were examined at different strain levels over the entire stress-strain curve. Uniaxial tensile deformation of the TWIP steel was modelled for different deformation temperatures using a modelling approach which considers two distinct populations of grains: twinned and twin-free ones. A key point of the work was a meticulous experimental determination of the evolution of the volume fraction of twinned grains during uniaxial tensile deformation. This information was implemented in a phase-mixture model that yielded a very good agreement with the experimental tensile behaviour for the tested range of deformation temperatures.
机译：Fe-18Mn-0.6C-1Al（wt％）TWIP钢的力学行为是在室温到400℃的温度范围内模拟的。所提出的本构模型基于Kocks-Mecking-Estrin（KME）模型。使用大量物理参数（例如位错平均自由程和孪晶晶粒的体积分数）的实验测量值确定模型参数。在整个应力-应变曲线上，以不同的应变水平检查了100多个晶粒，总面积约为300μm〜2。 TWIP钢的单轴拉伸变形是使用一种建模方法针对不同的变形温度进行建模的，该方法考虑了两种不同的晶粒：孪晶和无晶晶粒。这项工作的重点是对单晶拉伸变形过程中孪晶晶粒体积分数演变的精细实验确定。在相混合模型中实现了该信息，该模型与变形温度的测试范围内的实验拉伸行为非常吻合。

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  • 来源
    《Materials Science and Engineering》 |2014年第8期|224-231|共8页
  • 作者

    V. Shterner; A. Molotnikov; I. Timokhina; Y. Estrin; H. Beladi;

  • 作者单位

    Institute for Frontier Materials, Deakin University, Geelong, Victoria 3217 Australia;

    Center for Advanced Hybrid Materials, Department of Materials Engineering, Monash University, Clayton, Victoria 3800, Australia,Laboratory of Hybrid Nanostructured Materials, Moscow Institute of Steel and Alloys, Leninsky prosp. 4, Moscow 119049, Russia;

    Institute for Frontier Materials, Deakin University, Geelong, Victoria 3217 Australia;

    Center for Advanced Hybrid Materials, Department of Materials Engineering, Monash University, Clayton, Victoria 3800, Australia,Laboratory of Hybrid Nanostructured Materials, Moscow Institute of Steel and Alloys, Leninsky prosp. 4, Moscow 119049, Russia;

    Institute for Frontier Materials, Deakin University, Geelong, Victoria 3217 Australia;

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  • 正文语种 eng
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  • 关键词

    Constitutive modelling; Deformation twinning; Twinning induced plasticity (TWIP) steels; Stacking fault energy (SFE);

    机译：本构模型;变形孪晶;孪生感应塑性（TWIP）钢;堆叠故障能量（SFE）;

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