Numerical and Experimental Study of Geometrical Dimensions on Laser-TIG Hybrid Welding of Stainless Steel 1.4418

Publish Year: 1395
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:

JR_MPMPJ-5-2_003

تاریخ نمایه سازی: 7 بهمن 1399

Abstract:

In this paper, a three-dimensional finite element model has been developed to simulate the laser-TIG hybrid welding (HLAW) of stainless steel 1.4418 with thickness of 4 mm. Transient temperature profile and dimensions of the fusion zone and heat affected zone (HAZ) during welding process are calculatedusing finite element method (FEM) and were solved in the ABAQUS/Standard software.The heat source model is a combination of Goldak distribution for the arc heat flux, a body Gaussian distribution for laser heat flux and a surface heat flux model. The DFLUX subroutine was used for implementation of the movable welding heat sources of the models.To validate the model, several HLAWexperiments were performed with a pulsed Nd:YAG laser and TIGsources. Good agreement between the simulated and the experimental measurements revealed that the model would be appropriate forHLAWnumericalsimulation. Among the material properties, the material conductivity is the most important term which influences on the weld bed dimensions.

Authors

Mahmoud Moradi

Department of Mechanical Engineering, Faculty of Engineering, Malayer University, Malayer, Iran

Majid Ghoreishi

Faculty of Mechanical Engineering, K.N. Toosi University of Technology, Tehran, Iran

Azam Rahmani

Faculty of Mechanical Engineering, K.N. Toosi University of Technology, Tehran, Iran