Microstructural and mechanical properties of dissimilar Al-Ti joints prepared by GTAW welding-brazing

Development of Materials Science in Research and Education

Nagy, M.^1 ; Behulová, M.^1 ; Pérez, M.R.^2

Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, Ulica Jána Bottu . 2781/25, Trnava

917 24, Slovakia^1

Universidad Central Marta Abreu de Las Villas, Facultad de Ingenieria Mecánica e Industrial, Carretera a Camajuani Km. 5 y 1/2, Santa Clara, Villa Clara, Cuba^2

关键词: Chemical compositions;    Commercially Pure titaniums;    EDX microanalysis;    Gas tungsten arc welding;    Metals and alloys;    Microhardness measurement;    Microstructural analysis;    Welding parameters;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/465/1/012006/pdf
DOI  :  10.1088/1757-899X/465/1/012006

来源: IOP

【 摘 要 】

Joining of light metals and alloys including Al-Ti is of great interest of many producers particularly from automotive and aerospace industries. In this paper, conventional gas tungsten arc welding-brazing method was applied to join 2 mm thick plates of wrought AA5083-H111 aluminium alloy with commercially pure titanium Grade 2 using ER4043 filler rod. Butt type of joints with single- and double-square-groove welds were produced using various welding currents. Mechanical properties of prepared welded-brazed joints were evaluated by tensile tests and microhardness measurements. Microstructural analyses were carried out using light microscopy. The weld zones and Al-Ti interfaces were observed by scanning electron microscope. EDX microanalysis was used to identify variations in chemical composition across the welded-brazed joint interface. Finally, the analysis of the influence of welding parameters on the mechanical properties and dimensions of the fusion zone was accomplished.