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首页> 美国卫生研究院文献>Proceedings. Mathematical Physical and Engineering Sciences >Deformation heterogeneity and texture in surface severe plastic deformation of copper
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Deformation heterogeneity and texture in surface severe plastic deformation of copper

机译：铜表面严重塑性变形中的变形异质性和织构

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Comprehensive understanding of thermomechanical response and microstructure evolution during surface severe plastic deformation (S2PD) is important towards establishing controllable processing frameworks. In this study, the evolution of crystallographic textures during directional surface mechanical attrition treatment on copper was studied and modelled using the visco-plastic self-consistent framework. In situ high-speed imaging and digital image correlation of surface deformation in circular indentation were employed to elucidate mechanics occurring in a unit process deformation and to calibrate texture model parameters. Material response during directional surface mechanical attrition was simulated using a finite-element model coupled with the calibrated texture model. The crystallographic textures developed during S2PD were observed to be similar to those resultant from uniaxial compression. The implications of these results towards facilitating a processing-based framework to predict deformation mechanics and resulting crystallographic texture in S2PD configurations are briefly discussed.
机译：全面了解表面严重塑性变形（S 2 PD）期间的热机械响应和微观结构演变对于建立可控的加工框架非常重要。在这项研究中，研究了铜在定向表面机械磨损处理过程中的晶体织构演变，并使用粘塑性自洽框架对其进行了建模。圆形压痕中表面变形的原位高速成像和数字图像相关性可用于阐明在单位工艺变形中发生的力学并校准纹理模型参数。定向表面机械磨损过程中的材料响应是使用有限元模型和校准的纹理模型进行模拟的。观察到在S 2 PD期间形成的晶体织构类似于单轴压缩所产生的织构。简要讨论了这些结果对促进基于处理的框架来预测S 2 PD构型的变形力学和所得晶体织构的意义。

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