Investigation on the process parameters of TIG-welded aluminum alloy through mechanical and microstructural characterization

作     者：Muhammad Samiuddin Jing-long Li Muhammad Taimoor Mohammad Nouman Siddiqui Sumair Uddin Siddiqui Jiang-tao Xiong Muhammad Samiuddin;Jing-long Li;Muhammad Taimoor;Mohammad Nouman Siddiqui;Sumair Uddin Siddiqui;Jiang-tao Xiong

作者机构：State Key Laboratory of Solidification ProcessingNorthwestern Polytechnical UniversityXi’an710072PR China Shaanxi Key Laboratory of Friction Welding TechnologiesNorthwestern Polytechnical UniversityXi’an710072PR China Metallurgical Engineering DepartmentNED University of Engineering and TechnologyKarachi75850Pakistan Department of Aeronautics and AstronauticsInstitute of Space TechnologyIslamabad44000Pakistan 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2021年第17卷第4期

页      面：1234-1248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：Wuhan Sanlian Specific Tech Co. Ltd 

主　　题：Tungsten inert gas welding(TIG) Heat input Welding defects Tensile strength Charpy impact strength Micro-vicker hardness SEM 

摘      要：Multi-pass TIG welding was conducted on plates(15×300×180 mm^(3))of aluminum alloy Al-5083 that usually serves as the component material in structural applications such as cryogenics and chemical processing *** formation and solidification cracking are the most common defects when TIG welding Al-5083 alloy,which is sensitive to the welding heat *** the experiment,the heat input was varied from 0.89 kJ/mm to 5 kJ/mm designed by the combination of welding torch travel speed and welding ***,micro-Vicker hardness and Charpy impact tests were executed to witness the impetus response of heat input on the mechanical properties of the *** inspection was performed to assess the joint’s quality and welding *** results show that all the specimens displayed inferior mechanical properties as compared to the base *** was established that porosity was progressively abridged by the increase of heat *** results also clinched that the use of medium heat input(1-2 kJ/mm)offered the best mechanical properties by eradicating welding defects,in which only about 18.26% of strength was *** yield strength of all the welded specimens remained unaffected indica ted no influence of heat *** melted zone(PMZ)width also affected by heat input,which became widened with the increase of heat *** grain size of PMZ was found to be coarser than the respective grain size in the fusion *** impact testing revealed that the absorbed energy by low heat input specimen(welded at high speed)was greater than that of high heat input(welded at low speed)because of low porosity and the formation of equiaxed grains which induce better impact ***(-196℃)impact testing was also performed and the results corroborate that impact properties under the cryogenic environment revealed no appreciable change after welding at designated heat ***,Macro and micro fractured surfaces of tensile and impact spe