Microstructure investigation of dynamic recrystallization in hard machining:From thermodynamic irreversibility perspective

作     者：Binxun LI Xinzhi ZHANG Song ZHANG Binxun LI;Xinzhi ZHANG;Song ZHANG

作者机构：Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of EducationSchool of Mechanical EngineeringShandong UniversityJinan 250061China Key National Demonstration Center for Experimental Mechanical Engineering EducationShandong UniversityJinan 250061China China Unicom(Shandong)Industrial Internet Co.Ltd.Jinan 250001China 

出 版 物：《Frontiers of Mechanical Engineering》 (机械工程前沿（英文版）)

年 卷 期：2021年第16卷第2期

页      面：315-330页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：This work was supported by the National Natural Science Foundation of China(Grants Nos.51975333 and 51575321) the Major Science and Technology Innovation Project of Shandong Province,China(Grant No.2019JZZY010437) the Taishan Scholar Project of Shandong Province,China(Grant No.ts201712002) 

主　　题：thermodynamic irreversibility Helmholtz free energy microstructure evolution dynamic recrystallization hard milling 

摘      要：The drastically changed thermal,mechanical,and chemical energies within the machined surface layer during hard machining tend to initiate microstructural *** this paper,attention is paid to the introduction of thermodynamic potential to unravel the mechanism of microstructure ***,the thermodynamic potential-based model expressed by the Helmholtz free energy was proposed for predicting the microstructure changes of serrated chip and the machined surface ***,the proposed model was implemented into a validated finite element simulation model for cutting operation as a user-defined *** addition,the predicted irreversible thermodynamic state change in the deformation zones associated with grain size,which was reduced to less than 1 mm from the initial size of 1.5 mm on the machined surface,was provided for an in-depth *** good consistency between the simulated results and experimental data validated the efficacy of the developed *** research helps to provide further insight into the microstructure alteration during metal cutting.