Scholarlink

<p>The machining-induced dynamic recrystallization (DRX) of Inconel 718 significantly alters subsurface microstructure, leading to reduced work hardening—a phenomenon not yet fully captured by existing models. Despite extensive research on DRX behavior, no comprehensive framework currently accounts for the coupled thermal-microstructural evolution under realistic milling conditions, limiting predictive accuracy in industrial applications. The present research introduces an innovative thermo-mechanical force modeling framework, incorporating the effects of DRX, for the Inconel 718 alloy. A DRX-based shear flow resistance evolution scheme is initially formulated to capture the microstructural evolution as well as the corresponding flow softening behavior under conditions of elevated strain rate and temperature. To accurately quantify the thermal effects, a temperature prediction model was formulated following Jaeger’s moving heat source analytical strategy, employing mirror source techniques and thermal equilibrium analysis between the chip and workpiece. These models are integrated using a sequential thermo-mechanical coupling framework that reflects the influence of thermal feedback on DRX behavior. The proposed model is experimentally validated under various milling parameters using cutting force and infrared thermography. The obtained results demonstrate that the prediction accuracies of milling forces and temperature distributions using the model are substantially improved with respect to those obtained from the conventional Johnson–Cook model. These results provide both a fundamental framework for understanding thermo-mechanical interactions in DRX and practical insights for optimizing milling processes—particularly for difficult-to-machine alloys like Inconel 718.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Thermo-mechanical coupling milling force model considering the dynamic recrystallization behavior of Inconel 718

  • 期刊论文

  • 发表日期：

    2025年9月2日

查看全文
  • Baorui Zhang,
  • Shuang Li,
  • Shuo Chen,
  • Hanwei Teng,
  • Yini Chen,
  • Tae Jo Ko

摘要

The machining-induced dynamic recrystallization (DRX) of Inconel 718 significantly alters subsurface microstructure, leading to reduced work hardening—a phenomenon not yet fully captured by existing models. Despite extensive research on DRX behavior, no comprehensive framework currently accounts for the coupled thermal-microstructural evolution under realistic milling conditions, limiting predictive accuracy in industrial applications. The present research introduces an innovative thermo-mechanical force modeling framework, incorporating the effects of DRX, for the Inconel 718 alloy. A DRX-based shear flow resistance evolution scheme is initially formulated to capture the microstructural evolution as well as the corresponding flow softening behavior under conditions of elevated strain rate and temperature. To accurately quantify the thermal effects, a temperature prediction model was formulated following Jaeger’s moving heat source analytical strategy, employing mirror source techniques and thermal equilibrium analysis between the chip and workpiece. These models are integrated using a sequential thermo-mechanical coupling framework that reflects the influence of thermal feedback on DRX behavior. The proposed model is experimentally validated under various milling parameters using cutting force and infrared thermography. The obtained results demonstrate that the prediction accuracies of milling forces and temperature distributions using the model are substantially improved with respect to those obtained from the conventional Johnson–Cook model. These results provide both a fundamental framework for understanding thermo-mechanical interactions in DRX and practical insights for optimizing milling processes—particularly for difficult-to-machine alloys like Inconel 718.