极薄带异步轧制滑移带演化的晶体塑性有限元分析

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中文摘要：以单层晶极薄带轧制为研究对象,采用多尺度晶体塑性有限元方法模拟其在拉-压-剪复合应力状态下的宏观剪切带和微观滑移带演化,优化极薄带材轧制工艺.在微观层次上,每个晶粒被离散成若干个有限元单元,且每个积分点采用单晶体本构模型.宏-微观层次模拟的共同特征是滑移带演化高度的各向异性和局部化,微观层次的模拟更加明显.结果表明:新剪切带随轧制区施加额外剪切变形而形成,在拉-压-剪复合应力下,强剪切造成已缩窄的主次剪切带随轧制压下的增大而又扩展.单系滑移带在各变形晶粒内的演化差异很大,存在主次滑移,随压-剪复合应力状态的增强而形成亚滑移带.在拉-压-剪复合应力下,单滑移扩展和叠加形成贯穿晶界的累积滑移带,晶界起到很好的滑移承载和传递作用.

外文标题：Crystal plasticity finite element method(CPFEM)analysis for slip band development in foil asymmetrical rolling

外文摘要：A multi-scale crystal plastic finite element method is used to simulate the evolution of macroscopic shear band and microscopic slip band under tension-compression-shear combined stress optimizing the rolling process of single crystal foil rolling.At the microscopic level,each grain is separated into several finite element elements,and a single crystal constitutive model is used for each integral point.The common feature predicted by simulations at the macro-micro level is the anisotropy and localization of slip zone evolution height,more clearly revealed by simulations at the microscale.The results show that a new shear band is formed with additional shear deformation applied to the rolling zone.The narrowed primary and secondary shear bands to re-expand with the increase of rolling reduction under the combined stress state of tension-compression-shear.There are primary and secondary slips in which evolution of single-system slip bands varies greatly among the deformed grains,with sub-slip bands formed with the increase of compression-shear stress states.The single slip expands and superposes to form a cumulative slip band across the grain boundary,and the grain boundary plays an important role in carrying and transferring the slip under the combined stress state of tension-compression-shear.

外文关键词：

foil asymmetrical rollingsingle-layer crystal copper foilslip bandcrystal plasticityfinite element

作者：

陈守东、卢日环

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作者单位：

铜陵学院机械工程学院,安徽铜陵 244061

轧制技术及连轧自动化国家重点实验室(东北大学),沈阳 110819

铜陵学院工程液压机器人安徽普通高校重点实验室,安徽铜陵 244061

燕山大学国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛 066004

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关键词：

极薄带异步轧制单层晶铜箔滑移带晶体塑性有限元

基金：

国家自然科学基金资助项目国家自然科学基金资助项目安徽省自然科学基金资助项目安徽省重点研究与开发计划项目安徽省高校优秀青年人才支持计划项目安徽省高校优秀青年科研项目铜陵学院重点培育项目

项目编号：

51804219520054321808085QE161202004a05020011gxyq20220932022AH0301532020tlxyxs33

出版年：

2024

DOI：

10.11951/j.issn.1005-0299.20230050

材料科学与工艺

中国材料研究学会哈尔滨工业大学

材料科学与工艺

CSTPCD北大核心

影响因子：0.491

ISSN：1005-0299

年,卷(期)：2024.32(4)