Journal ArticleDOI
Finite element study of residual stresses and distortions in arc welding with a trailing liquid nitrogen heat sink
R.S. Sudheesh,N. Siva Prasad +1 more
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TLDR
In this paper, the effect of LN2 heat sink on arc welding of mild steel plates is studied using experimental and numerical methods using X-ray diffraction technique and dial gauges.Abstract:
Purpose – The purpose of this paper is to study the effect of trailing liquid nitrogen (LN2) heat sink on arc welding of mild steel plates. The effect on temperature field, stress and distortions are studied using experimental and numerical methods.Design/methodology/approach – The methodology consists of experimental and numerical methods. The temperature measured at a point near the arc is used to estimate the cooling capacity of the heat sink using inverse heat transfer (IHT) method. The estimated cooling flux is applied to the finite element model to study the stress and distortions using LN2 heat sink. The stresses are measured using X‐ray diffraction technique and the distortions using dial gauges.Findings – IHT method has been employed in estimating the cooling capacity of the LN2 jet. This has been applied to welding to study the effect on weld induced stresses and distortions. The method can be extended to calculate the heat removal rate in various manufacturing processes where cooling is employe...read more
Citations
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Studies on multipass welding with trailing heat sink considering phase transformation
TL;DR: In this article, a two pass butt welding of 6mm mild steel plates was simulated using 3D finite element model using temperature and phase dependent material properties, material phase transformations were simulated using suitable phase transformation kinetic models.
Journal ArticleDOI
A validated thermo mechanical FEM model of bead-on-plate welding
TL;DR: In this article, the authors presented an accurate FEM model of bead-on-plate welds of 316L stainless steels through thermo-mechanical analysis, which was composed using ANSYS Parametric Design Language (APDL) program.
Journal ArticleDOI
Tensões Residuais em Soldagem a Arco: Uma Visão Holística
TL;DR: In this article, a visao critica sobre o assunto atraves de uma revisao bibliografica is presented, e a diagrama que lista e classifica os fatores governantes na geracao de tensoes residuais como independentes e secundarios, visando facilitar o entendimento do efeito de cada fator.
Journal ArticleDOI
Studies on the effects of cryogenic cooling on microstructure and mechanical properties of plasma arc welded SS 316
TL;DR: In this paper , the effect of cryogenic cooling during the welding process of thin sheets of SS 316 to improve the microstructure, mechanical properties, and reducing the distortion of the welded material was investigated at room temperature.
References
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Journal ArticleDOI
A new finite element model for welding heat sources
TL;DR: In this article, a double ellipsoidal geometry is proposed to model both shallow penetration arc welding processes and the deeper penetration laser and electron beam processes, which can be easily changed to handle non-axisymmetric cases such as strip electrodes or dissimilar metal joining.
Book
Inverse Heat Transfer: Fundamentals and Applications
TL;DR: Inverse heat transfer: Fundamentals and Applications, Second Edition as mentioned in this paper includes techniques within the Bayesian framework of statistics for the solution of inverse problems and their applications for solving problems in convective, conductive, radiative, and multi-physics problems.
Journal ArticleDOI
FEM prediction of welding residual stress and distortion in carbon steel considering phase transformation effects
TL;DR: In this article, the authors investigated the effects of solid-state phase transformation on welding residual stress and distortion in low carbon and medium carbon steels, based on a sequentially coupled thermal, metallurgical, mechanical 3-D finite element model.
Journal ArticleDOI
Cooling approaches and cutting temperatures in cryogenic machining of Ti-6Al-4V
Shane Y. Hong,Yucheng Ding +1 more
TL;DR: In this article, liquid nitrogen (LN2) is applied to cutting Ti-6Al-4V, a difficult-to-machine but widely used material in aerospace industry.
Journal ArticleDOI
Prediction of welding distortion and residual stress in a thin plate butt-welded joint
Dean Deng,Hidekazu Murakawa +1 more
TL;DR: In this paper, a three-dimensional, thermo-elastic-plastic, large deformation finite element method (FEM) is used to simulate welding distortion in a low carbon steel butt-welded joint with 1mm thickness.