It is well known that the mechanical and deformation properties of metal matrix composites (MMCs) are related to their microstructures. However, less work has been carried out in laser bending to examine the dependency of microstructures of MMCs on deformation behaviour. In this paper, two aluminium-based metal matrix composites, Al2009/20 vol% SiC[sub w] and Al2009/20 vol% SiC[sub p] were investigated. A YAG laser was used to scan the composites both parallel and perpendicular to their rolling directions. It was reported that under the same processing conditions, a larger bending angle was obtained for the Al2009/SiC[sub p] composite. No significant change in microstructures was observed for both composites after bending. Experimental findings also revealed that for the particulate reinforced composite, a larger laser bending angle was obtained when the laser scanning direction was perpendicular to the rolling direction, whereas no significant difference was observed for the Al2009/SiC[sub w] composite. These phenomena were shown to relate to the shape and distribution of reinforcements.
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机译:众所周知,金属基复合材料(MMC)的机械和变形性能与它们的微观结构有关。但是,在激光弯曲中进行较少的工作来检查MMC的微观结构对变形行为的依赖性。本文研究了两种铝基金属基复合材料Al2009 / 20 vol%SiC [sub w]和Al2009 / 20 vol%SiC [sub p]。使用YAG激光来平行和垂直于其轧制方向扫描复合材料。据报道,在相同的加工条件下,Al2009 / SiC [sub p]复合材料的弯曲角较大。两种复合材料弯曲后均未观察到微观结构的显着变化。实验结果还表明,对于颗粒增强复合材料,当激光扫描方向垂直于轧制方向时,可以获得较大的激光弯曲角度,而Al2009 / SiC [sub w]复合材料则没有观察到明显差异。这些现象表明与钢筋的形状和分布有关。
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