Effect of Submerged Arc Welding Parameter on Crack Growth Energy on St37

Journal of Solid Mechanics

مقاله 15، دوره 9، شماره 4، اسفند 2017، صفحه 878-890   

نوع مقاله: Research Paper

نویسندگان

J.A Khodaii¹؛ A Mostafapour^{* 2}؛ M.R Khoshravan²

¹Department of Mechanical Engineering ,Amirkabir University of Technology, Tehran, Iran

²Department of Mechanical Engineering ,University of Tabriz, Tabriz, Iran

چکیده

In this article the influence of welding parameters such as electrical current, feed rate and stick out on crack growth energy was investigated. Therefore, prepared specimens were welded in various conditions. Using the Minitab software, 18 states of 36 possible states were chosen and applied. Then a crack was crated on the weld metal and the force-displacement diagram was plotted. Comparison of results shows that in high electricity current, the extra heat flux is the dominant factor, which causes coarse grains of microstructures. On the other hand, in low electricity current, lack of fusion and penetration reduce the crack propagation energy. Furthermore, the neural network could predict the amount of energy with high accuracy.                                    

کلیدواژه‌ها

Submerged arc welding؛ Crack growth energy؛ Welding parameter؛ Optimization

مراجع

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