铜箔轧制滑移系演化的晶体塑性有限元模拟

doi:10.12068/j.issn.1005-3026.2016.05.009

东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (5): 647-652.DOI: 10.12068/j.issn.1005-3026.2016.05.009

铜箔轧制滑移系演化的晶体塑性有限元模拟

陈守东¹，刘相华¹，刘立忠²，孙祥坤¹

(1. 东北大学轧制技术及连轧自动化国家重点实验室，辽宁沈阳110819; 2. 东北大学材料科学与工程学院，辽宁沈阳110819)

收稿日期:2015-03-27 修回日期:2015-03-27 出版日期:2016-05-15 发布日期:2016-05-13
通讯作者: 陈守东
作者简介:陈守东(1987-)，男，安徽蚌埠人，东北大学博士研究生; 刘相华(1953-)，男，黑龙江双鸭山人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(51374069， U1460107).

Crystal Plasticity Finite Element Simulation of Slip System Evolution in Pure Copper Foil Rolling

CHEN Shou-dong¹， LIU Xiang-hua¹， LIU Li-zhong²， SUN Xiang-kun¹

1. State Key Laboratory of Rolling and Automation， Northeastern University， Shenyang 110819， China; 2. School of Materials Science & Engineering， Northeastern University， Shenyang 110819， China.

Received:2015-03-27 Revised:2015-03-27 Online:2016-05-15 Published:2016-05-13
Contact: LIU Xiang-hua
About author:-
Supported by:
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摘要/Abstract

摘要： 为了定量描述厚度尺寸对极薄带轧制微观变形不均匀性的影响，采用率相关晶体塑性理论和Voronoi图的多晶模型，考虑试样尺寸，晶体取向及其分布，模拟了不同厚度铜箔在相同压下率条件下的变形行为，得到了在细观尺度上铜箔的微观应力应变和滑移系分布.模拟获得的应力-应变曲线和实验测得的曲线基本一致.通过对20%压下率不同厚度铜箔的轧制变形的研究表明，无论是在晶粒内部还是在晶粒间，材料变形都非常不均匀，主要是由在铜箔厚度方向上只有一层晶粒时，晶粒尺寸、形貌和取向的不均匀分布，近邻晶粒取向差以及滑移系启动特性所引起的.

关键词: 极薄带轧制, 晶体塑性有限元, 非均匀变形, 滑移系启动

Abstract: The distributions of the stress， strain and slip systems in pure copper foil rolling with the same reduction were simulated by the rate-dependent crystal plasticity theory and Voronoi polycrystalline model with respect to specimen dimension， grain orientation and its distribution to quantitatively evaluate the influence of thickness on inhomogeneous deformation behavior of foil rolling at mesoscale. The simulated stress-strain curves agree well with the experimental results. The simulation results reveal that the deformation behavior in the polycrystalline aggregate is inhomogeneous not only in intracrystalline but also in intergranule with a 20% reduction in foil rolling. The foils are composed of only a single layer grain across thickness， the grains with different sizes， shapes and orientations are unevenly distributed in the foil， the misorientation of neighboring grains and the property of active slip systems.

Key words: foil rolling, crystal plasticity finite element, inhomogeneous deformation, slip system activity

中图分类号:

TG335.5⁺8

陈守东，刘相华，刘立忠，孙祥坤. 铜箔轧制滑移系演化的晶体塑性有限元模拟[J]. 东北大学学报:自然科学版, 2016, 37(5): 647-652.

CHEN Shou-dong， LIU Xiang-hua， LIU Li-zhong， SUN Xiang-kun. Crystal Plasticity Finite Element Simulation of Slip System Evolution in Pure Copper Foil Rolling[J]. Journal of Northeastern University Natural Science, 2016, 37(5): 647-652.

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铜箔轧制滑移系演化的晶体塑性有限元模拟

Crystal Plasticity Finite Element Simulation of Slip System Evolution in Pure Copper Foil Rolling

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