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首页> 外文期刊>Journal of Materials Engineering and Performance >Optical Measurement of Forming Limit and Formability of Cu/Al Clad Metals
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Optical Measurement of Forming Limit and Formability of Cu/Al Clad Metals

机译：铜/铝包金属成形极限和成形性的光学测量

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摘要

A digital image deformation measurement and analysis control system (XJTUDIC 8.0) was employed to measure the forming limit strain for Cu/Al clad metals produced via explosive welding technique. A contrast test between the digital image correlation (DIC) method and the conventional grid method was also implemented using the SPCC sheet metal forming limit test. The effect of heat treatment and contact status on forming limit was discussed based on the forming limit strain of Cu/Al clad metals. The interfacial and fracture structures were analyzed using scanning electron microscopy. The fracture site was predicted by finite element method. Results demonstrate that the forming limit curve of Cu/Al clad metals through DIC is more likely to reflect the formability of SPCC accurately. The forming limit of the clad with Al in the inner layer is higher than that of the clad with Cu in the inner layer. The formability of the annealed clads is superior to that of the non-annealed clads. The local interface failure induces the microcracks in Cu/Al clad metals during the forming process, which could be the main failure mode. With the finite element method, the fracture location of Cu/Al clad metals caused by uniaxial tensile during the forming limit test using DIC method is predicted accurately.
机译：使用数字图像变形测量和分析控制系统（XJTUDIC 8.0）测量通过爆炸焊接技术生产的Cu / Al复合金属的成形极限应变。还使用SPCC钣金成形极限测试对数字图像相关（DIC）方法和常规网格方法之间进行了对比测试。基于Cu / Al复合金属的成形极限应变，讨论了热处理和接触状态对成形极限的影响。使用扫描电子显微镜分析界面和断裂结构。用有限元方法预测骨折部位。结果表明，通过DIC形成的Cu / Al复合金属的形成极限曲线更可能准确地反映SPCC的可成形性。在内层中具有Al的包覆层的形成极限高于内层中具有Cu的包覆层的形成极限。退火包层的可成型性优于未退火包层的可成型性。局部界面失效会在形成过程中在Cu / Al复合金属中引起微裂纹，这可能是主要的失效模式。采用有限元法，可以准确预测出采用DIC法进行成形极限试验时单轴拉伸引起的Cu / Al复合金属的断裂位置。

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