文献类型：期刊文献

英文题名：Study on the wear mechanism of high-entropy alloy coated tools and grain evolution in micro-cutting of TC4 titanium alloy

作者：Zhang, Ping[1];Wang, Shunxiang[1];Zhang, Junbao[2];Zhang, Tengfei[1];Li, Guohong[1]

机构：[1]Guangdong Ocean Univ, Coll Mech & Power Engn, Zhanjiang, Peoples R China;[2]Yantai Univ, Coll Mech & Power Engn, Yantai, Peoples R China

年份：2025

卷号：92

起止页码：253

外文期刊名：PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY

收录：SCI-EXPANDED(收录号：WOS:001420468600001)、、EI(收录号：20250117622413)、Scopus(收录号：2-s2.0-85213563307)、WOS

基金：The authors gratefully acknowledge the financial support provided by various organizations. In particular, they wish to thank the National Natural Science Foundation of China (Grant Nos. 51705270) and the Research Start-up Fund of Guangdong Ocean University.

语种：英文

外文关键词：High-entropy alloy coating; Micro-cutting; Tool wear; Dynamic recrystallization; Finite element simulation

外文摘要：This study investigates the wear mechanisms and grain refinement patterns of CoCrFeNiAlX series high-entropy alloy-coated tools during the micro-cutting of TC4 titanium alloy. Three coatings were selected: CoCrFeNiAl (Al1), CoCrFeNiAl0.6 (Al0.6), and CoCrFeNi (Al0). Using DEFORM-3D for three-dimensional cutting simulations, the effects of coating type and thickness on tool wear and grain refinement in the cutting deformation zone were analyzed. Results show that at a coating thickness of 10 mu m, all types of coated tools exhibited minimal wear depth. Al0.6 coating was significantly affected by thickness, with wear depth increasing by up to 10 %. Dual- layer coatings performed better in reducing wear and maintained good wear resistance even at higher thicknesses, whereas single-layer coatings showed a marked increase in wear depth and rate with increased thickness. As coating thickness increased, the number of dynamic recrystallization (DRX) grains at location P2 decreased for single-layer coated tools. Dual-layer coated tools showed stable DRX numbers, fluctuating between 400 and 600 at P2. Compared to single-layer coatings, dual-layer coatings exhibited higher DRX grain counts across all cutting deformation zones, especially in the third deformation zone, demonstrating superior mechanical properties and recrystallization effects. Dual-layer coated tools also displayed good stability with minimal grain size variation, with Al1 as the inner layer contributing to more stable grain sizes. The Al0.6+Al1 coating experienced significant grain size growth in the third deformation zone due to stress concentration.