The influence of microstructure evolution on mechanical properties in machining Inconel 718

作者：Qi Yu, Xinyu Yan, Jingjie Zhang, Jing Yu, Lili Fan · 发表于：Machining Science and Technology · 年份：2025 · DOI：10.1080/10910344.2025.2565589 · 被引用次数：3 · 研究领域：Metallurgy and Material Forming、Advanced machining processes and optimization、Advanced Machining and Optimization Techniques

In the machining process, Inconel 718 alloy is typically subjected to various complex factors such as mechanical forces, thermal forces, electromagnetic forces and chemical reactions. The impact of machining process parameters on aspects such as workpiece surface morphology, cutting forces, tool wear and microstructure is intricate and interconnected. Therefore, understanding the influence of the machining process on the mechanical properties of Inconel 718 alloy is a complex issue that requires consideration of multiple factors. This study aims to improve our knowledge regarding how grain size evolution affects the mechanical properties of Inconel 718 alloy. Room temperature tensile tests were conducted on Inconel 718 alloy samples machined under different cutting speed conditions to investigate the effects of grain size evolution and thermo-mechanical loading on mechanical properties. The research findings indicate that as the grain size gradually decreases, the plastic deformation capability of Inconel 718 alloy improves, leading to better toughness and ductility. Furthermore, the yield strength and tensile strength of Inconel 718 alloy increase as the grain size decreases, with dislocation strengthening contributing predominantly to the yield strength.