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Characteristics of high-shear and low-pressure grinding for Inconel718 alloy with a novel super elastic composite abrasive tool

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Abstract

Inconel718 alloy is widely employed in aerospace industries due to its excellent thermo-mechanical property. As a typical difficult-to-machine material, it is extremely easy to cause grinding burns, surface scratches, and grinding wheel blockages during traditional grinding. In this work, we developed a super elastic composite abrasive tool (ECAT) based on the principle of liquid body armor and proposed a high-shear and low-pressure precision intelligent grinding method. The grinding experiments of selective laser melting (SLM)–fabricated Inconel718 workpiece was conducted to explore the grinding characteristics of ECAT using the precision intelligent grinding system. The optimal grinding parameters were explored. Under the optimal grinding parameters, the surface roughness of the SLM workpiece was reduced from 385.2 to 44.5 nm after 40 grinding strokes. The material removal rate was about 0.42 μm/min. The surface quality of the workpiece was significantly improved. In addition, the grinding force with different abrasive layers was investigated. It was found that the average ratio of the tangential force (Ft) to the normal force (Fn) of an abrasive layer with liquid-body-armor-like abrasive system is 0.427, which was much higher than that of 0.162 for pure high-performance fabrics (without liquid-body-armor-like abrasive system). The high-shear and low-pressure grinding characteristic of ECAT was verified.

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Funding

This work was financially supported by the National Natural Science Foundation of China (Nos. 51875329 and 51,905,322), the China postdoctoral Science Foundation (No. 2021T140420), the Taishan Scholar Special Foundation of Shandong Province (No. tsqn201812064), the Shandong Provincial Natural Science Foundation (No. ZR2017MEE050), the Shandong Provincial Key Research and Development Project (No. 2018GGX103008), the Scientific Innovation Project for Young Scientists in Shandong Provincial Universities (No. 2019KJB030), and the Key Research and Development Project of Zibo City (No. 2019ZBXC070).

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Correspondence to Yebing Tian.

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Gu, Z., Tian, Y., Han, J. et al. Characteristics of high-shear and low-pressure grinding for Inconel718 alloy with a novel super elastic composite abrasive tool. Int J Adv Manuf Technol 123, 345–355 (2022). https://doi.org/10.1007/s00170-022-10179-2

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