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首頁> 美國衛(wèi)生研究院文獻(xiàn)>Materials >Scratch Testing of AlSi12/SiCp Composite Layer with High Share of Reinforcing Phase Formed in the Centrifugal Casting Process
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Scratch Testing of AlSi12/SiCp Composite Layer with High Share of Reinforcing Phase Formed in the Centrifugal Casting Process

機(jī)譯:離心鑄造過程中形成高份額強(qiáng)化相的AlSi12 / SiCp復(fù)合層的劃痕測試

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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.
機(jī)譯:劃痕測試可以評估材料對劃痕發(fā)展的敏感性,并且在某種程度上可以衡量其耐磨性,因此可以擴(kuò)展材料應(yīng)用可用性領(lǐng)域的知識,尤其是其加工能力。該研究的目的是評估具有較高份額的增強(qiáng)相(V> 40%)的離心形成的AlSi12 / SiC復(fù)合層對金剛石壓頭的耐劃傷性。分析了金剛石壓頭的微觀結(jié)構(gòu)和載荷對劃痕深度和復(fù)合層對硬質(zhì)和脆性SiC顆粒中裂紋成核和擴(kuò)展敏感性的影響。已經(jīng)提出了一種簡單的SiC裂紋模型,取決于其尺寸,形狀(幾何形狀)和相對于刮擦方向的取向。

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