Experimental Investigation of Material Removal Mechanism in Grinding of Alumina by Single Grain Scratch Test
Experimental Investigation of Material Removal Mechanism in Grinding of Alumina by Single Grain Scratch Test
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DOI：
10.4028/www.scientific.net/amr.797.96
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发表时间：
2013-09
期刊：
影响因子：
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通讯作者：
T. Tawakoli;H. Kitzig;R. Lohner
中科院分区：
文献类型：
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作者：
T. Tawakoli;H. Kitzig;R. Lohner
氧化铝是一种经常用于高性能应用的材料。氧化铝的研磨通常伴随着微裂纹，这会使表面质量恶化。为了更深入地了解氧化铝材料在超声振动和非超声振动磨削过程中材料去除机理的特点，进行了单磨粒划痕试验。在0.53 μm的切屑厚度范围内，研究了超声振动和切削速度对氧化铝材料去除机理的影响。结果表明，随着切削速度的提高，材料堆积减少。另一方面，从韧性到脆性的材料去除模式的过渡发生在较高的切削速度。超声波振动在切割速度为30 m/s时对减少堆积值有很大影响。
Alumina is a material that is frequently used in high performance applications. Grinding of alumina is usually associated with micro-cracks which deteriorate surface quality. In order to get a deeper knowledge of the characteristics of material removal mechanisms in alumina during grinding with and without ultrasonic vibration of the workpiece, single grit scratch tests were performed in this research. The effect of the ultrasonic vibrations and cutting speed on the material removal mechanism of alumina was investigated in the chip thickness range of 0.53 μm which is common in precision grinding operations. It was shown that the material pile-up decrease with higher cutting speed. On the other hand, the transition from ductile to brittle mode of material removal occurs earlier in higher cutting speeds. The ultrasonic vibrations showed great influence in the cutting speed 30 m/s in reducing the pile-up values.