Journal Article

Experimental investigations into milling characteristics of CoCrFeNiMn high-entropy alloy assisted by low-temperature regulation

Sun, Xingwei, Yang, Heran, Liu, Yin, Li, Cuiping, Dong, Zhixu, Dong, Haosheng, Mu, Shibo, Zhao, Hongxun, Luo, Zhenshan

2025

Overview

CoCrFeNiMn high-entropy alloy (HEA), as a difficult-to-cut material, produces a large amount of heat of plastic deformation in the cutting area during cutting, and this local overheating phenomenon will lead to thermal damage to the surface of the workpiece, forming burn defects. This study proposes the application of an icing clamp in the milling process of CoCrFeNiMn to achieve low-temperature machining in order to address issues such as poor machined surface quality. Finite element simulations of low-temperature milling of HEA were carried out. Orthogonal and single-factor experiments for low-temperature milling of HEA were designed. The action mechanisms of milling process parameters (spindle speed, feed speed, and cutting depth) on the cutting force and cutting temperature were analyzed, and simulation results related to chip shape and workpiece surface topography were obtained. The range of process parameters for the low-temperature milling experiments of HEA were determined. Finally, based on the error analysis between experimental and simulation data of cutting force, the reliability of the finite element simulation model was verified. The influence mechanisms of process parameters on surface roughness, 3D surface topography, surface micro-topography, and surface microhardness were analyzed under low-temperature and room-temperature. The formation characteristics of the machined surface and the material removal behavior were revealed.

• Publisher: Springer Berlin Heidelberg,Springer Nature B.V
• Subject: Additive manufacturing / Cooling / Corrosion resistance / Cutting force / Cutting parameters / Engineering / Entropy / Error analysis / Finite element method / High entropy alloys / Lasers / Low temperature / Mechanical Engineering / Mechanical properties / Microhardness / Milling (machining) / Morphology / Nickel / Overheating / Plastic deformation / Process parameters / Room temperature / Sensors / Simulation models / Strain hardening / Surface properties / Surface roughness / Technical Paper / Temperature / Tensile strength / Titanium alloys / Topography / Workpieces / Yield stress