Comparative investigation on microstructure-based modelling for the orthogonal cutting of AISI1045

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• 作者：Lijing Xie ; Tengyi Shang ; Xiaolei Chen…
• 关键词：Finite element model ; Microstructure ; Size effect ; Grain shape ; AISI1045
• 刊名：The International Journal of Advanced Manufacturing Technology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：88
• 期：1-4
• 页码：603-611
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Industrial and Production Engineering; Media Management; Mechanical Engineering; Computer-Aided Engineering (CAD, CAE) and Design;
• 出版者：Springer London
• ISSN：1433-3015
• 卷排序：88

文摘

With the feed rate decreasing to the dimension of grain size and tool edge radius, cutting process is often carried out in the grain interior and grain boundary. In this paper, the orthogonal cutting process of hot-rolled AISI1045 steel is studied and its metallographic microstructure is analyzed for the establishment of microstructure-based models which incorporate the effect of ferrite and pearlite grains. In order to discover the contribution of microstructure and edge radius to the cutting process, three contrast simulation models including equivalent homogeneous material model with rounded-edge cutting insert (model I), rectangular grain model with sharp edge cutting insert (model II), and rectangular grain model with rounded-edge cutting insert (model III) are built up for the orthogonal cutting processes of hot-rolled AISI1045. Then Voronoi grain model (model IV) and real grain model (model V) are also developed to compare with model III to study the effect of grain shape on the cutting process. The simulation models are compared with the experiments in terms of chip morphology, cutting force, and specific cutting force. And the examination on the stress distribution shows that the real grain model with tool edge radius discovers more details about the mechanics in primary shear zone.