000			01990nam a22001577a 4500
082			_a621
100			_aAslam, Muhammad Hanzla _9130472
245			_aOrthogonal Optimization of Resistance Spot Welding (RSW) Parameters for Al 5052 with Al 3003 / _cMuhammad Hanzla Aslam
264			_aIslamabad : _bSMME- NUST; _c2025.
300			_a82p. _bSoft Copy _c30cm
500			_aThe concept of light weight, fuel efficient, environmentally friendly and safety in automobile has raised the use of Aluminum alloys and their joining through resistance spot welding process for mass production. This study focuses on the orthogonal optimization of process parameters for Resistance Spot Welding (RSW) of Al 5052-H32 and AL 3003-0 hybrid structure in automobile / aerospace vehicles. Taguchi L9 orthogonal array was used to design the welding experiments. Welding current, welding time and electrode force are used as input parameters and maximum tensile shear strength (TSS) is used as output parameter. Welding parameters are optimized to achieve spot joint without expulsion and crack having suitable nugget size. Optical microscopy is used to study the nugget size through macrographs of the weld joint and microstructure of the nugget, HAZ and base material. Microhardness test and tensile shear test are performed to evaluate the strength and failure behavior of the weld joints. Maximum TSS achieved 91.7 MPa at 32 kA, 80 ms and 5.5 kN of welding current, welding time and electrode force respectively with button pull out failure. Taguchi L9 analysis gives optimized parameters as 34 kA welding current, 80 ms welding time and 5.5 kN electrode force. ANOVA result shows that welding current has highest effect on weld tensile shear strength followed by welding electrode force and weld time.
650			_aMS Mechanical Engineering
700			_aSupervisor: Dr. Sadaqat Ali _9119866
856			_uhttp://10.250.8.41:8080/xmlui/handle/123456789/54763
942			_2ddc _cTHE
999			_c614661 _d614661