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Materials 2018, 11(9), 1649;

Methodology to Reduce Distortion Using a Hybrid Thermal Welding Process

Calculus and Simulation Unit at AIMEN Technology Center, C/Relva 27A Torneiros, 36410 Porriño-Pontevedra, Spain
Escuela de Ingeniería Industrial, Campus Universitario, University of Vigo, 36310 Vigo-Pontevedra, Spain
Author to whom correspondence should be addressed.
Received: 6 July 2018 / Revised: 1 September 2018 / Accepted: 3 September 2018 / Published: 7 September 2018
(This article belongs to the Special Issue Special Issue of the Manufacturing Engineering Society (MES))
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Welding is a thermal process which results in high strain and stress values in the material and leads to its change of phase. This might cause significant distortions in the welded structure, which often becomes a relevant design and manufacturing issue. This study deals with a line-heating-based forming process that is applied at the moment of the welding operation, with the final objective of minimizing distortion. A FEM (finite element method) based on a thermo-elastoplastic approach is used here. The computational method is first calibrated in three stages: heatline forming calibration, flame heat source calibration, and the weld process. The final model presented in this work simulates a hybrid process called htTTT (high-temperature thermal transient tensioning) which was optimized over large T welds to minimize the final distortion of the components. View Full-Text
Keywords: welding distortion; FEM; LSND (low stress no distortion); htTTT; model validation welding distortion; FEM; LSND (low stress no distortion); htTTT; model validation

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Souto, J.; Ares, E.; Alegre, P.; Cerqueiro, J. Methodology to Reduce Distortion Using a Hybrid Thermal Welding Process. Materials 2018, 11, 1649.

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