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Ductile Regime machining of metal matrix composites

机译：金属基质复合材料的韧性调节加工

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This paper presents research results on ultraprecision machining of metal matrix composites (MMCs) reinforced with either SiC or Al_20_3 particles. Ductile-regime machining of both SiC and aluminum was applied to improve the surface integrity of the composite. Both polycrystalline diamond (PCD) and single crystalline diamond (SCD) tools were used to ultraprecision machine the composites at the depth of cut ranging from nearly 0 to 1.0 um. A SCD tool removed the MMC as chips while a PCD simply smeared the surface. The critical depths of cut were found to be l um and 0.2 um for MMCs reinforced with Al_20_3 and SiC, respectively. Both depth of cut and crystallographic direction of the ceramic particle were the sufficient conditions for ductile-regime machining. Because of the random orientation of the reinforcing particles, some were fractured due to the cutting action while others were machined in ductile mode at the same depth of cut. A measured surface finish, therefore, varied significantly depending on the measured areas.
机译：本文介绍了用SiC或Al_20_3颗粒加固的金属基质复合材料（MMCs）的超出ultrafision加工的研究结果。施加SiC和铝的延性调节器加工以改善复合材料的表面完整性。多晶金刚石（PCD）和单晶金刚石（SCD）工具均用于超出近0至1.0μm的切割深度的复合材料。在PCD简单地涂抹表面时，SCD工具将MMC作为芯片移出。发现临界切割深度为L UM和0.2μm，分别用AL_20_3和SiC加固的MMC。陶瓷颗粒的切割深度和晶体方向的两个深度是延性制造机械加工的充分条件。由于增强颗粒的随机取向，由于切割动作，一些裂缝是断裂的，而其他在相同的切割深度的延性模式下加工。因此，测量的表面光洁度根据测量区域而显着变化。

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