Experimental Study on Influencing Factors of Surface Quality in Milling of FeCoNiCrAlx High Entropy Alloy

doi:10.3901/JME.2024.17.367

Abstract

Abstract: At present, there are many researches on non-mechanical processing technology of high entropy alloy, but there are few researches on milling process of high entropy alloy. In order to obtain high surface quality and high entropy alloy parts, experimental studies on milling mechanism and influencing factors of surface quality of FeCoNiCrAl_x high entropy alloy are carried out to explore the effects of milling methods, process parameters, tool types and element content on the surface roughness and surface topography of high entropy alloy, and to find the process parameters that can obtain higher surface quality. The surface roughness regression model are established, and the surface hardness of high entropy alloy before and after machining are compared to study the work hardening phenomenon of high entropy alloy. The experimental results show that the high entropy alloys FeCoNiCrAl_0.1 and FeCoNiCrAl_0.5 have plastic deformation during milling. With the increase of speed, the decrease of feed speed and the decrease of milling depth, the surface quality of high entropy alloy becomes better. Under the same process parameters, the surface quality of side milling is better than that of slot milling, and the surface quality of HMX coating tool is better than that of SGS coating tool. The surface quality of FeCoNiCrAl_0.5 high entropy alloy is higher than that of FeCoNiCrAl_0.1 under the same processing parameters, and the milling parameters have no obvious effect on the surface hardness of the two alloys, but the surface hardness of the two alloys is obviously improved after milling. The milling process optimization parameters of high surface mass and high entropy alloy obtained by milling experiment provide data support for engineering application of high entropy alloy.

Key words: high-entropy alloy, milling mechanism, surface topography, surface roughness, hardness of surface

CLC Number:

TH161

WEN Xuelong, ZHAO Zhenghao, GONG Yadong, LI Junpeng. Experimental Study on Influencing Factors of Surface Quality in Milling of FeCoNiCrAl_x High Entropy Alloy[J]. Journal of Mechanical Engineering, 2024, 60(17): 367-378.

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Experimental Study on Influencing Factors of Surface Quality in Milling of FeCoNiCrAl_x High Entropy Alloy

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