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Numerical and Experimental Investigations of Welded Butt Joints of (AISI304) | ||
| Engineering and Technology Journal | ||
| Article 1, Volume 28, Issue 6, 2010, Pages 1218-1240 PDF (5.45 M) | ||
| DOI: 10.30684/etj.28.6.15 | ||
| Authors | ||
| Muna. K. Abbass; Karima E. Amori; Rashaq A.Mohammed | ||
| Abstract | ||
| Simulation of welding process (TIG or GTAW) of butt joint using finite element analysis is presented. The base metal is ST(304). The numerical model developed by include moving heat source, temperature dependent material properties, phase change and transformation, and mechanical analysis. The parameters studied numerically were welding current ranging between (80-150A) depending on, welding velocity, plate thickness (2.5mm -5mm), and material of the heat sink (carbon steel and copper). The numerical results show that increasing the welding current with increasing of welding speed decreases the fusion zone area. Using copper plate underneath the welded plates acts as a dissipation heat sink which generates stronger heat gradient compared with carbon steel plate. The experimental results show that increasing welding current leads to increasing the micro hardness, and the microstructure becomes smaller. Due to increasing cooling rate the microhardness have maximum value at the boundary between the Fusion zone and heat affected zone. | ||
| Keywords | ||
| welding simulations; heat transfer in welding; numerical heat transfer of welding | ||
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