Abstract
To achieve excellent surface quality, this paper presented an experimental study on single-point diamond turning of a 55 vol% SiCp/Al composite below the ductile brittle transition depth of SiC. The dry and mist cutting results indicated that the surface roughness generated by dry turning is much higher than those generated by mist turning. Surface roughness decreased with the increasing rotation speed and increased with the increasing feed rate, while the influence of depth of cut was insignificant. The minimum surface roughness Sa could be achieved around 0.05 μm. Besides, the roughness rebounded obviously under much small feed rate (0.5 μm/z) or depth of cut (0.25 μm). Machined surface examined by SEM indicated that many SiC particles were cut in ductile mode, while there were still numerous defects, such as holes, pits, tearings, grooves, and voids. The chipping, cleavage, and abrasive wear were the dominating wear patterns of diamond tools. In the end, the main influential factors on the cutting process of SiC and approaches for enhancing the probability of ductile cutting SiC were discussed.
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The authors are grateful to the colleagues for their essential contribution to the work.
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This work is supported by the China Postdoctoral Science Foundation (Grant Nos. 2019M663043), the National Natural Science Foundation of China (Grant Nos. 51575360 and 51805333), and the Science and Technology Innovation Commission Shenzhen (Grant Nos. JCYJ20170817094310049 and JSGG20170824111725200).
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Wang, T., Wu, X., Zhang, G. et al. An experimental study on single-point diamond turning of a 55 vol% SiCp/Al composite below the ductile brittle transition depth of SiC. Int J Adv Manuf Technol 108, 2255–2268 (2020). https://doi.org/10.1007/s00170-020-05550-0
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DOI: https://doi.org/10.1007/s00170-020-05550-0