Abstract

The Al/hard chrome/Al laminate with cracked interlayer was processed by single-pass rolling and accumulative roll bonding (ARB). A micro-cracked hard chrome with the thickness range of 5–15 µm was deposited on the Al layer by the electroplating process. The micro-cracked hard chrome layer was considered as a model material to investigate the deformation processing of the metal laminate with a discontinuous interlayer. The layered composite with discontinuous interlayer was modeled by finite element analysis. Three configurations of discontinuities, including the longitudinal, transverse, and rectangular pattern, were considered in the interlayer. In agreement with the experiments, the simulation results showed that during the roll bonding process, the discontinuities that are oriented transversely spread in the rolling direction while those that are located longitudinally slightly expand in the transverse direction. The peeling test after the single roll bonding revealed that the bond strength of the Al/Cr composite with cracked interlayer increased with increasing the thickness reduction and decreasing the hard chrome layer. The hard chrome layer was gradually fragmented during the ARB process and was distributed in the Al matrix.

Graphic Abstract

中文翻译：

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裂纹夹层在铝/硬铬/铝层压板变形加工中的作用

摘要

带有裂纹夹层的Al /硬铬/ Al层压板通过单道次轧制和累积轧制键合（ARB）进行处理。通过电镀工艺在铝层上沉积了厚度为5-15 µm的微裂纹硬铬。微裂纹硬铬层被视为模型材料，以研究具有不连续夹层的金属层压板的变形过程。通过有限元分析对具有不连续中间层的层状复合材料进行建模。在中间层中考虑了不连续的三种配置，包括纵向，横向和矩形模式。与实验结果一致，仿真结果表明，在辊压粘合过程中，横向的不连续性在轧制方向上横向扩展，而纵向上的不连续性则在横向方向上稍微扩展。单辊粘合后的剥离试验表明，具有裂纹夹层的Al / Cr复合材料的粘合强度随厚度的减小和硬铬层的减少而增加。硬铬层在ARB过程中逐渐破碎，并分布在Al基体中。

图形摘要