Simulation and Experimental Study on Temperature in Cryogenic Cutting of Titanium Aluminum Alloy

doi:10.3901/JME.2024.19.318

Abstract

Abstract: Titanium aluminum alloy has the characteristics of low density, high strength, oxidation resistance and high temperature creep resistance, and has great application potential in the aerospace industry.However, the material has high strength and poor thermal conductivity, and the high cutting temperature leads to low processing efficiency and poor surface integrity.The static compression test and dynamic compression test are conducted, and the constitutive equation of the material at -196～600 ℃ was fitted.According to the actual cooling conditions, the cutting cooling boundary is defined, the convective heat transfer coefficient is set, and the two-dimensional right-angle cutting model is established.The cutting insert for temperature measuring is designed for experimental verification.The chip morphology under liquid nitrogen low temperature cooling is in good agreement with the simulated chip morphology.The error of cutting force and cutting temperature obtained between experiment and simulation is small, which indicates that the constructed constitutive equation and finite element model have high accuracy, and the simulated cutting temperature field also has high credibility.Combined with the equivalent plastic deformation, stress field and cutting temperature field obtained by simulation, the material removal mechanism of liquid nitrogen cooling cutting of titanium aluminum alloy is further analyzed, and it is found that it changes from periodic fracture removal to periodic fracture and adiabatic shear fracture composite removal.

Key words: titanium aluminum alloy, constitutive equation, cryogenic cutting, cutting temperature, removal mechanism

CLC Number:

TG506

WANG Xiangyu, QIU Wenhao, NIU Jintao, LIU Guoliang, FU Xiuli, GUO Peiquan, QIAO Yang. Simulation and Experimental Study on Temperature in Cryogenic Cutting of Titanium Aluminum Alloy[J]. Journal of Mechanical Engineering, 2024, 60(19): 318-331.

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