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首页> 外文期刊>Journal of Materials Processing Technology >Grain refinement and strain hardening in IF steel during multi-axis compression: Experiment and modelling
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Grain refinement and strain hardening in IF steel during multi-axis compression: Experiment and modelling

机译：IF钢在多轴压缩过程中的晶粒细化和应变硬化：实验和建模

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摘要

The effect of severe plastic deformation (SPD) during cyclic multi-axis compression on grain refinement and strain hardening in interstitial free (IF) steel is studied quantitatively. In the experimental part, the material samples were cold deformed in the MAXStrain system by successive compression in two mutually orthogonal directions. The electron backscatter diffraction (EBSD) technique was used to measure the average spacing of the dislocation cell (low angle) and cell-block (high angle) boundaries. In the modelling part, the decrease in size of dislocation cells and cell blocks was expressed in terms of the effective plastic strain defined such that strain-rate reversals slow down its accumulation. The strengthening effect of microstructural evolution was included in the continuum mechanics framework of finite strain plasticity. Examples of simulation of the behaviour of IF steel severely deformed by multi-axis compression are calculated and compared to experimental data.
机译：定量研究了循环多轴压缩期间严重塑性变形（SPD）对无间隙（IF）钢中晶粒细化和应变硬化的影响。在实验部分，通过在两个相互正交的方向上连续压缩，使材料样品在MAXStrain系统中冷变形。电子背散射衍射（EBSD）技术用于测量位错晶胞（低角度）和晶胞块（高角度）边界的平均间距。在建模部分，以定义的有效塑性应变表示位错细胞和细胞块尺寸的减小，从而使应变率反转减慢了其积累。微观结构演变的强化作用包括在有限应变可塑性的连续力学框架中。计算了通过多轴压缩严重变形的IF钢行为的模拟示例，并将其与实验数据进行了比较。

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