超声波轧制微成形过程中铜箔严重塑性变形行为的研究  

Study on Severe Plastic Deformation of Copper Foil in Ultrasonic Rolling Micro-forming Process

作　　者：宋子良 杨利军 张振猛 张昊[1] 王晨阳 黄健豪 朱协彬[1,2] 陈志浩[1,2] SONG Ziliang;YANG Lijun;ZHANG Zhenmeng;ZHANG Hao;WANG Chenyang;HUANG Jianhao;ZHU Xiebin;CHEN Zhihao(School of Materials Science and Engineering,Anhui Polytechnic University,Wuhu 241000,China;Anhui Key Laboratory of High-performance Non-ferrous Metal Materials,Anhui Polytechnic University,Wuhu 241000,China)

机构地区：[1]安徽工程大学材料科学与工程学院,安徽芜湖241000 [2]安徽工程大学高性能有色金属材料省级重点实验室,安徽芜湖241000

出　　处：《安徽工程大学学报》2023年第5期19-28,37,共11页Journal of Anhui Polytechnic University

基　　金：安徽省科技重大专项基金资助项目(202003a05020054);安徽工程大学-繁昌区产业协同创新专项基金资助项目(2021fccyxtb1);大学生创新创业基金资助项目(S202010363126)。

摘　　要：对微尺寸厚度铜箔的超声冲击(UI)和超声滚压(URIP)塑变过程进行了理论分析,得出了与静载荷、振幅和材料厚度有关的超声动态冲击效应判据。通过Abaqus数值模拟和实验观察到与应力叠加不同的动态冲击塑性变形模式,模拟与计算的临界载荷、振幅值均为168.5 N、9.4μm,验证了判据的有效性。材料厚度的减小显著增强了弹塑性应力波在界面的反射刚壁效应,使UI产生的等效塑性应变(PEEQ)呈指数型增长并均匀分布。单道次URIP作用下200μm退火铜箔平均晶粒由5.5μm显著细化至0.5μm,且铜箔横截面上形成的亚微米晶粒尺寸呈现均匀分布形态,与在宏观材料表面产生的梯度结构组织不同。高效、均匀的细化效果显示了超声振动在微尺寸厚度箔材强化上的应用潜力。The plastic deformation process of Ultrasonic Impact(UI)and Ultrasonic Rolling Impact Process(URIP)of copper foil with micro-size thickness was theoretically analyzed,and the criterion of ultrasonic dynamic impact effect related to static load,amplitude and material thickness was obtained.Through Abaqus numerical simulation and experiment,it is observed that the dynamic impact plastic deformation mode is different from the stress superposition,and the simulated and calculated critical load and amplitude values are 168.5 N and 9.4μm.The validity of the criterion is verified.With the decrease of material thickness,the reflection rigid wall effect of elastic-plastic stress wave at the interface is significantly enhanced,and the equivalent plastic strain(PEEQ)produced by UI increases exponentially and is uniformly distributed.Under the action of single pass URIP,the average grain size of 200μm annealed copper foil is significantly refined from 5.5μm to 0.5μm,and the submicron grain size formed on the cross section of copper foil shows a uniform distribution,which is different from the gradient structure on the macroscopic material surface.The efficient and uniform refinement effect shows the application potential of ultrasonic vibration in the strengthening of micro-size thick foil.

关 键 词：严重塑性变形 超声波振动 应力叠加 动态冲击 铜箔 

分 类 号：TG146.21[一般工业技术—材料科学与工程]