Indian Welding Journal

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Investigations on Transient Temperature Distribution and Distortion in Shielded Metal Arc Welding of SA 516 Gr. 70 Steel


Affiliations
1 ISGEC Hitachi Zosen Limited, Dahej – 392130, Gujarat, India
2 Advanced Welding Laboratory, Department of Mechanical Engineering, S. V. National Institute of Technology, Surat – 395007, Gujarat, India
     

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Efforts are made in this article to investigate the thermal and mechanical phenomena by presenting a coupled thermal and structural analysis of SA516 Grade-70 steel. This material has wide applicability in the fabrication of pressure vessels, boilers, etc., due to its excellent weldability and formability. An actual ongoing problem from a reputed industry, related to distortion during the shielded metal arc welding process, is considered and experiments are carried out on the chosen steel. Results are evaluated employing a two-step methodology, involving simulation. The first step encompasses thermal analysis, providing insights into transient temperature distribution, while the subsequent mechanical analysis offers data on residual stresses and distortion. In the case of heat input, a volumetric heat source with double ellipsoidal heat distribution is used whereas a plasticity material model with rate-independent bilinear kinematic hardening is adopted for the structural analysis. Additionally, temperature-dependent material properties are factored into both scenarios. The data derived from numerical analysis align closely with experimental findings, presenting valuable insights for fabricating industries.

Keywords

SMAW Process, Simulation, Thermal Analysis, Structural Analysis, Goldak's Heat Source, Welding Distortion, SA516 Grade-70 Steel.
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  • Investigations on Transient Temperature Distribution and Distortion in Shielded Metal Arc Welding of SA 516 Gr. 70 Steel

Abstract Views: 189  |  PDF Views: 4

Authors

Kalpeshkumar M. Sojitriya
ISGEC Hitachi Zosen Limited, Dahej – 392130, Gujarat, India
V. D. Kalyankar
Advanced Welding Laboratory, Department of Mechanical Engineering, S. V. National Institute of Technology, Surat – 395007, Gujarat, India
K. V. Champaneria
Advanced Welding Laboratory, Department of Mechanical Engineering, S. V. National Institute of Technology, Surat – 395007, Gujarat, India
G. P. Chudasma
Advanced Welding Laboratory, Department of Mechanical Engineering, S. V. National Institute of Technology, Surat – 395007, Gujarat, India

Abstract


Efforts are made in this article to investigate the thermal and mechanical phenomena by presenting a coupled thermal and structural analysis of SA516 Grade-70 steel. This material has wide applicability in the fabrication of pressure vessels, boilers, etc., due to its excellent weldability and formability. An actual ongoing problem from a reputed industry, related to distortion during the shielded metal arc welding process, is considered and experiments are carried out on the chosen steel. Results are evaluated employing a two-step methodology, involving simulation. The first step encompasses thermal analysis, providing insights into transient temperature distribution, while the subsequent mechanical analysis offers data on residual stresses and distortion. In the case of heat input, a volumetric heat source with double ellipsoidal heat distribution is used whereas a plasticity material model with rate-independent bilinear kinematic hardening is adopted for the structural analysis. Additionally, temperature-dependent material properties are factored into both scenarios. The data derived from numerical analysis align closely with experimental findings, presenting valuable insights for fabricating industries.

Keywords


SMAW Process, Simulation, Thermal Analysis, Structural Analysis, Goldak's Heat Source, Welding Distortion, SA516 Grade-70 Steel.

References





DOI: https://doi.org/10.22486/iwj.v57i1.223728