Unified Principal S-N Equation for Friction Stir Welding of 5083 and 6061 Aluminum Alloys

作     者：Xiangwei Li Ji Fang Xiaoli Guan Xiangwei Li;Ji Fang;Xiaoli Guan

作者机构：CRRC QIQIHAR ROLLING STOCK CO.LTDQiqihar 161000China College of Locomotive and Rolling Stock EngineeringDalian Jiaotong UniversityDalian 116028China 

出 版 物：《Chinese Journal of Mechanical Engineering》 (中国机械工程学报（英文版）)

年 卷 期：2021年第34卷第2期

页      面：190-200页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 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] 080201[工学-机械制造及其自动化] 

基　　金：Supported by Department of Education of Liaoning Province(Grant No.JDL2020019) Dalian High Level Talents Project(Grant No.2017RQ132) 

主　　题：5083 and 6061 aluminum alloy Friction stir welding Master S-N curve Fatigue life 

摘      要：With the popularization of friction stir welding(FSW),5083-H321 and 6061-T6 aluminum alloy materials are widely used during the FSW *** this study,the fatigue life of friction stir welding with two materials,i.e.,5083-H321 and 6061-T6 aluminum alloy,are *** tests were carried out on the base metal of these two materials as well as on the butt joints and overlapping FSW *** principle of the equivalent structural stress method is used to analyze the FSW test data of these two *** fatigue resistances of these two materials were com-pared and a unified principal S-N curve equation was *** key parameters of the unified principal S-N curve obtained by fitting,Cd is 4222.5,and h is 0.2693.A new method for an FSW fatigue life assessment was developed in this study and can be used to calculate the fatigue life of different welding forms with a single S-N *** main fatigue tests of bending and tension were used to verify the unified principal S-N curve *** results show that the fatigue life calculated by the unified mean 50%master S-N curve parameters are the closest to the fatigue test *** reliability,practicability,and generality of the master S-N curve fitting parameters were verified using the test *** unified principal S-N curve acquired in this study can not only be used in aluminum alloy materials but can also be applied to other materials.