Numerical analysis of reverse dual-rotation friction stir welding process  

作　　者：石磊 武传松 刘会杰 

机构地区：[1]Key Lab for Liquid-Solid Structure Evolution and Materials Processing ( Ministry of Education ) , andInstitute for Materials Joining, Shandong University, Jinan, 250061 [2]State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology, Harbin, 150001

出　　处：《China Welding》2013年第4期30-35,共6页中国焊接（英文版）

摘　　要：A three-dimensional model of reverse dual-rotation friction stir welding （RDR-FSW） is developed to conduct the numerical simulation of heat generation and material flow during the process. The reverse rotation of the assisted shoulder and the tool pin is considered to model the heat generation rate. The predicted temperature difference between the advancing side and the retreating side in RDR-FSW is less than that in conventional FSW. There are two reverse flows during the RDR-FSW which is beneficial to the uniformity of the temperature profile. Due to the reverse rotation effects of the assisted shoulder, the predicted shape and size of thermal-mechanically affected zone （TMAZ） based on the iso-viscosity line are decreased greatly compared to the conventional FSW. It lays solid foundation for optimizing the process parameters in RDR-FSW.A three-dimensional model of reverse dual-rotation friction stir welding （RDR-FSW） is developed to conduct the numerical simulation of heat generation and material flow during the process. The reverse rotation of the assisted shoulder and the tool pin is considered to model the heat generation rate. The predicted temperature difference between the advancing side and the retreating side in RDR-FSW is less than that in conventional FSW. There are two reverse flows during the RDR-FSW which is beneficial to the uniformity of the temperature profile. Due to the reverse rotation effects of the assisted shoulder, the predicted shape and size of thermal-mechanically affected zone （TMAZ） based on the iso-viscosity line are decreased greatly compared to the conventional FSW. It lays solid foundation for optimizing the process parameters in RDR-FSW.

关 键 词：numerical simulation reverse dual-rotation friction stir welding （RDR-FSW） material flow heat transfer 

分 类 号：TU27[建筑科学—建筑设计及理论] V231.13[航空宇航科学与技术—航空宇航推进理论与工程]