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CFD modelling of weld pool formation and solidification in a laser micro-welding process

The application of developed thermal models has demonstrated that parameters, such as power, scanning velocity and spot diameter of laser beams have considerable effects on the formation of weld pools. The properties of the weld metal are heavily dependent on the solidification microstructure, and a...

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Main Authors:	Hozoorbakhsh, Asghar, Abd Shukor, Mohd Hamdi, Sarhan, Ahmed Aly Diaa Mohammed, Ismail, Mohd Idris Shah, Tang, Chak Yin, Tsui, Gary Chi Pong
Format:	Article
Published:	Elsevier 2019
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://eprints.um.edu.my/20068/ https://doi.org/10.1016/j.icheatmasstransfer.2019.01.001
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spelling	my.um.eprints.200682021-10-01T03:40:46Z http://eprints.um.edu.my/20068/ CFD modelling of weld pool formation and solidification in a laser micro-welding process Hozoorbakhsh, Asghar Abd Shukor, Mohd Hamdi Sarhan, Ahmed Aly Diaa Mohammed Ismail, Mohd Idris Shah Tang, Chak Yin Tsui, Gary Chi Pong TJ Mechanical engineering and machinery The application of developed thermal models has demonstrated that parameters, such as power, scanning velocity and spot diameter of laser beams have considerable effects on the formation of weld pools. The properties of the weld metal are heavily dependent on the solidification microstructure, and an accurate prediction of the weld pool solidification requires consideration in both the thermodynamics and kinetics of solidification. The computations we presented for a transient three-dimensional model show the aspects of weld pool formation and solidification in a quantitative manner. Our focus was the examination of heat transfer and fluid flow analysis in laser micro-welding of thin stainless-steel sheet (SUS304) using the computational fluid dynamics (CFD) approach. In this research work, a useful linkage between the laser micro-welding parameters and the geometry of the micro-weld can be derived from the results, and informative guidance was achieved as to how the width, depth and length of the weld pool differ during laser micro-welding as a function of spot diameter, scanning velocity and laser power. The simulation results have been compared with two sets of experimental data to predict the weld bead geometry and solidification pattern made on thin stainless steel sheet using a continuous wave (CW) fibre laser. The reasonable agreement between the simulated and experimental results, demonstrates the reliability of the computed model, and the results can be used to determine the laser micro-welding conditions necessary to achieve an appropriate target microstructure. However, the results allow estimation of acceptable ranges of welding variables, to attain the required micro-weld geometry. Elsevier 2019 Article PeerReviewed Hozoorbakhsh, Asghar and Abd Shukor, Mohd Hamdi and Sarhan, Ahmed Aly Diaa Mohammed and Ismail, Mohd Idris Shah and Tang, Chak Yin and Tsui, Gary Chi Pong (2019) CFD modelling of weld pool formation and solidification in a laser micro-welding process. International Communications in Heat and Mass Transfer, 101. pp. 58-69. ISSN 0735-1933 https://doi.org/10.1016/j.icheatmasstransfer.2019.01.001 doi:10.1016/j.icheatmasstransfer.2019.01.001
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Research Repository
url_provider	http://eprints.um.edu.my/
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Hozoorbakhsh, Asghar Abd Shukor, Mohd Hamdi Sarhan, Ahmed Aly Diaa Mohammed Ismail, Mohd Idris Shah Tang, Chak Yin Tsui, Gary Chi Pong CFD modelling of weld pool formation and solidification in a laser micro-welding process
description	The application of developed thermal models has demonstrated that parameters, such as power, scanning velocity and spot diameter of laser beams have considerable effects on the formation of weld pools. The properties of the weld metal are heavily dependent on the solidification microstructure, and an accurate prediction of the weld pool solidification requires consideration in both the thermodynamics and kinetics of solidification. The computations we presented for a transient three-dimensional model show the aspects of weld pool formation and solidification in a quantitative manner. Our focus was the examination of heat transfer and fluid flow analysis in laser micro-welding of thin stainless-steel sheet (SUS304) using the computational fluid dynamics (CFD) approach. In this research work, a useful linkage between the laser micro-welding parameters and the geometry of the micro-weld can be derived from the results, and informative guidance was achieved as to how the width, depth and length of the weld pool differ during laser micro-welding as a function of spot diameter, scanning velocity and laser power. The simulation results have been compared with two sets of experimental data to predict the weld bead geometry and solidification pattern made on thin stainless steel sheet using a continuous wave (CW) fibre laser. The reasonable agreement between the simulated and experimental results, demonstrates the reliability of the computed model, and the results can be used to determine the laser micro-welding conditions necessary to achieve an appropriate target microstructure. However, the results allow estimation of acceptable ranges of welding variables, to attain the required micro-weld geometry.
format	Article
author	Hozoorbakhsh, Asghar Abd Shukor, Mohd Hamdi Sarhan, Ahmed Aly Diaa Mohammed Ismail, Mohd Idris Shah Tang, Chak Yin Tsui, Gary Chi Pong
author_facet	Hozoorbakhsh, Asghar Abd Shukor, Mohd Hamdi Sarhan, Ahmed Aly Diaa Mohammed Ismail, Mohd Idris Shah Tang, Chak Yin Tsui, Gary Chi Pong
author_sort	Hozoorbakhsh, Asghar
title	CFD modelling of weld pool formation and solidification in a laser micro-welding process
title_short	CFD modelling of weld pool formation and solidification in a laser micro-welding process
title_full	CFD modelling of weld pool formation and solidification in a laser micro-welding process
title_fullStr	CFD modelling of weld pool formation and solidification in a laser micro-welding process
title_full_unstemmed	CFD modelling of weld pool formation and solidification in a laser micro-welding process
title_sort	cfd modelling of weld pool formation and solidification in a laser micro-welding process
publisher	Elsevier
publishDate	2019
url	http://eprints.um.edu.my/20068/ https://doi.org/10.1016/j.icheatmasstransfer.2019.01.001
_version_	1713200124608380928
score	13.211869

CFD modelling of weld pool formation and solidification in a laser micro-welding process

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