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首页> 外文期刊>Journal of Materials Engineering and Performance >Study on Texture Evolution and Shear Behavior of an Al/Ni/Cu Composite
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Study on Texture Evolution and Shear Behavior of an Al/Ni/Cu Composite

机译：Al / Ni / Cu复合材料纹理演化与剪切行为的研究

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摘要

The microstructure, texture, and mechanical properties of the Al/Ni/Cu composite during various accumulative roll bonding (ARB) cycles were studied using optical microscopy, scanning electron microscopy, x-ray diffraction, shear punch test, and hardness test. In addition, ImageJ software and Rietveld software were used in order to study microstructure and dislocation density variations, respectively. It was found that Ni and Cu layers were fractured and distributed in the Al matrix due to differences in their mechanical properties. Fracture and distribution of Cu and Ni particles after cycle five led to the alteration of the composite structure from a layered to a particle-reinforced structure. ARB process leads to the formation of strong orientation along the -fiber and also to pronounced copper and dillamore components in both Al and Cu phases. Furthermore, the shear yield stress and ultimate shear strength of the composite increased as the ARB process advanced; however, shear elongation presented a non-uniform variation. Investigation of the fracture surfaces revealed that the mechanical properties of the composite are affected not only by the strain hardening of the Cu layer, but also by the structural change in the composite during the initial ARB cycles. During the last stages of the process, however, changes in mechanical properties were mostly governed by reinforcement particles serving as strain concentration zones and the strain hardening of the Al matrix.
机译：使用光学显微镜，扫描电子显微镜，X射线衍射，剪切冲突试验和硬度试验研究了各种累积辊粘合剂（ARB）循环期间的Al / Ni / Cu复合材料的微观结构，质地和机械性能。此外，使用ImageJ软件和Rietveld软件，以便分别研究微观结构和位错密度变化。发现由于其机械性能的差异，Ni和Cu层被破裂并分布在Al基质中。循环5后Cu和Ni颗粒的裂缝和分布导致复合结构从层状到颗粒增强结构的改变。 ARB过程导致沿 - 纤维的强烈取向，也可以在Al和Cu阶段中发音铜和Dillamore组分。此外，随着ARB过程的先进，复合材料的剪切屈服应力和极限剪切强度增加;然而，剪切伸长率呈现了不均匀的变化。裂缝表面的研究表明，复合材料的机械性能不仅受Cu层的应变硬化影响，而且通过在初始Ab循环期间通过复合材料的结构变化影响。然而，在该方法的最后阶段期间，机械性能的变化主要由用作应变浓度区域和Al基质的应变硬化的增强颗粒来控制。

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