首页> 外文会议>ASME international manufacturing science and engineering conference 2011 >INVESTIGATION ON THE EFFECT OF SiC NANOPARTICLES ON CUTTING FORCES FOR MICRO-MILLING MAGNESIUM MATRIX COMPOSITES
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INVESTIGATION ON THE EFFECT OF SiC NANOPARTICLES ON CUTTING FORCES FOR MICRO-MILLING MAGNESIUM MATRIX COMPOSITES

机译:SiC纳米颗粒对微研磨镁基复合材料切削力影响的研究

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摘要

Magnesium Metal Matrix Composites (Mg-MMCs) with nano-sized reinforcements exhibit better mechanical properties comparing to pure Magnesium (Mg) and its alloys. However, it is challenging to improve the machinability of this kind of composites. An analytical cutting force model for the micro-milling process was developed and validated to analyze the micro-machinability of the SiC nanoparticles reinforced Mg-MMCs. This model is different from the previous ones because it encompasses the behaviors of the reinforcement nanoparticles in the three cutting regimes, i.e., shearing, ploughing and elastic recovery. The volume fraction of particles and particle size are considered as two significant factors affecting the cutting forces in this model. The effects of the reinforcement nanoparticles on cutting forces were studied through modeling and experimental validation. The simulated cutting forces show a good agreement with the experimental data. Moreover, it is indicated that the amplitude and profile of cutting forces vary with the reinforcement particle's volume fraction. This mainly arises from the strengthening effect of SiC nanoparticles.
机译:与纯镁(Mg)及其合金相比,具有纳米级增强材料的镁金属基复合材料(Mg-MMCs)具有更好的机械性能。然而,提高这种复合材料的可加工性是具有挑战性的。建立了用于微铣削过程的分析切削力模型,并进行了验证,以分析SiC纳米颗粒增强的Mg-MMCs的微加工性。该模型与以前的模型不同,因为它包含了增强纳米颗粒在三种剪切方式下的行为,即剪切,犁削和弹性回复。在该模型中,颗粒的体积分数和粒径被认为是影响切削力的两个重要因素。通过建模和实验验证研究了增强纳米颗粒对切削力的影响。模拟切削力与实验数据吻合良好。此外,表明切削力的幅度和轮廓随增强颗粒的体积分数而变化。这主要源于SiC纳米颗粒的强化作用。

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