000			02452nam a22001577a 4500
082			_a621
100			_aKhan, Muhammad Ammar _9130415
245			_aEffect of Process Parameters and Filler Materials on Mechanical Properties of TIG Welded Aluminum Alloys / _cMuhammad Ammar Khan
264			_aIslamabad : _bSMME- NUST; _c2025.
300			_a132p. _bSoft Copy _c30cm
500			_aTIG welding has wide area of application in various industries like automobile, aerospace and marine, etc. In TIG welding, welding parameters and filler materials play a vital role in creating a strong welded joint. This research work was focused on investigation of effect of process parameters and filler materials on TIG welding of AA 5052-T0 and AA 7075-T0. In the present study, three TIG welding parameters, current, gas flow rate and filler rod diameter were changed up to three levels and their effects on tensile strength, flexural strength (face/root), micro-hardness, and microstructure were investigated. Two different filler materials, ER 4043 and ER 5356 were utilized in this study. Experiments were conducted on a 1.5 mm thick sheet of AA 5052 and AA 7075 and were designed according to Taguchi method. Moreover, for optimization techniques like S/N ratio, ANOVA analysis and regression analysis were also utilized. For ER 4043 samples, maximum tensile strength, flexural strength (face), flexural strength (root) and micro-hardness obtained were 193.2 MPa, 382.3 MPa, 271 MPa and 77.1 HV respectively. Similarly, for ER 5356 sample maximum tensile strength, flexural strength (face), flexural strength (root) and microhardness obtained were 196.4 MPa, 481.9 MPa, 187 MPa and 88.6 HV respectively. It was found that current was the most influential parameter followed by filler rod diameter. ER 5356 showed better mechanical properties but it was more prone to hot cracking. Optimized responses were obtained at current 70A, gas flow rate 11 L/min and filler rod diameter 1.6 mm with ER 5356 filler rod diameter. Model confirmatory test showed less than 5% error between predicted and experimental values. Microstructural analysis also showed presence of intermetallic compounds like Al-Si, Mg2Si and Al3Mg2 in welded samples of ER 4043 and ER 5356.
650			_aMS Mechanical Engineering
700			_aSupervisor : Dr. Sadaqat Ali _9119866
856			_uhttp://10.250.8.41:8080/xmlui/handle/123456789/54239
942			_2ddc _cTHE
999			_c614569 _d614569