Effect of Conventional and Pulsed TIG Welding on Microstructural and Mechanical Characteristics of AA 6082-T6 Repair Welds

作     者：NAING Thet Htet MUANGJUNBUREE Prapas NAING Thet Htet;MUANGJUNBUREE Prapas

作者机构：Department of Mining and Materials EngineeringFaculty of EngineeringPrince of Songkla UniversityHat YaiSongkhla90110Thailand Center of Excellence in Metal and Materials Engineering(CEMME)Prince of Songkla UniversityHat YaiSongkhla90110Thailand 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2023年第38卷第4期

页      面：865-876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：Funded by the Center of Excellence in Metals and Materials Engineering(CEMME),Faculty of Engineering,Prince of Songkla University Supported by the National Science,Research and Innovation Fund(NSRF)and Prince of Songkla University(No.ENG6505079S) 

主　　题：repair welds pulsed TIG welding aluminum alloy 6082-T6 ER 4043 filler 

摘      要：Repair welding of AA 6082-T6 joints was carried out using ER 4043 filler through the TIG welding process with or without pulsed *** and mechanical characteristics of the joints before and after repairing were investigated by examining macrostructure,microstructure,and distributions of porosity in the weld metal(WM),and by hardness,tensile,and bending *** observed that the welding current,phase transformations in heat-affected zone(HAZ)and porosity introduced in the WM during welding influence on its mechanical properties in *** experimental results showed that the bead width and penetration as well as size of pores in the joints were mainly influenced by the welding *** sound joints were obtained at a welding current of 140 A with or without pulsed current when welding speed and gas flow rate were set at 20 cm·min-1 and 15 L·min-1,*** them,the decrease in mechanical properties of repair weld(RW)was directly related to the phase transformations in the over-ageing zone due to the double welding thermal cycles and elevated distribution of porosity in the *** addition,it was observed that the comparatively smaller grain size and lower porosity in WM of the RW produced by pulsed TIG welding gave a positive effect on its mechanical properties.