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Scratch Testing of AlSi12/SiCp Composite Layer with High Share of Reinforcing Phase Formed in the Centrifugal Casting Process

机译:离心铸造过程中形成高份额强化相的AlSi12 / SiCp复合层的划痕测试

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摘要

The scratch test enables assessing the susceptibility of a material to the development of scratches and, being in some ways a measure of its abrasion resistance, allows extended knowledge in the field of material application usability, especially its machining capabilities. The aim of the study was to assess the resistance of a centrifugally formed AlSi12/SiC composite layer with a high share of reinforcing phase (V > 40%) to scratching with a diamond indenter. The microstructure and effect of the load applied to the diamond indenter on the scratch depth and susceptibility of the composite layer to the nucleation and propagation of cracks in hard and brittle SiC particles were analyzed. A simple model of SiC cracking depending on their size, shape (geometry), and orientation in relation to the direction of scratching has been proposed.
机译:划痕测试可以评估材料对划痕发展的敏感性,并且在某种程度上可以衡量其耐磨性,因此可以扩展材料应用可用性领域的知识,尤其是其加工能力。该研究的目的是评估具有较高份额的增强相(V> 40%)的离心形成的AlSi12 / SiC复合层对金刚石压头的耐划伤性。分析了金刚石压头的微观结构和载荷对划痕深度和复合层对硬质和脆性SiC颗粒中裂纹成核和扩展敏感性的影响。已经提出了一种简单的SiC裂纹模型,取决于其尺寸,形状(几何形状)和相对于刮擦方向的取向。

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