Time evolved force domination in arc weld pools

The flow within the melt pool during welding is a major factor that dictates the formation of the final fusion zone shape, solidification microstructure and defects. In this paper, we report the evolution sequence of the arc weld pool flow that observed via fast in-situ synchrotron X-ray imaging. Va...

Full description

Bibliographic Details
Main Authors: Fan Wu, Ken Vidar Falch, Da Guo, Paul English, Michael Drakopoulos, Wajira Mirihanage
Format: Article
Language:English
Published: Elsevier 2020-05-01
Series:Materials & Design
Online Access:http://www.sciencedirect.com/science/article/pii/S0264127520300678
id doaj-381aba5194f04f86a7e86925b0e9a0b2
record_format Article
spelling doaj-381aba5194f04f86a7e86925b0e9a0b22020-11-25T02:06:36ZengElsevierMaterials & Design0264-12752020-05-01190Time evolved force domination in arc weld poolsFan Wu0Ken Vidar Falch1Da Guo2Paul English3Michael Drakopoulos4Wajira Mirihanage5Department of Materials, The University of Manchester, Manchester M13 9PL, UKDepartment of Materials, The University of Manchester, Manchester M13 9PL, UKDepartment of Materials, The University of Manchester, Manchester M13 9PL, UKDepartment of Materials, The University of Manchester, Manchester M13 9PL, UKDiamond Light Source, Didcot OX11 0DE, UKDepartment of Materials, The University of Manchester, Manchester M13 9PL, UK; Corresponding author.The flow within the melt pool during welding is a major factor that dictates the formation of the final fusion zone shape, solidification microstructure and defects. In this paper, we report the evolution sequence of the arc weld pool flow that observed via fast in-situ synchrotron X-ray imaging. Varying flow regimes attribute to the dominance of characteristic forces within the weld pool during rapid solid-liquid-solid phase transformation. Our analysis indicates the general sequence in the arc, surface tension and gravity driven force domination. Welding process parameters appear to influence significantly in determining the domination interval and the intensity of individual force. In some instances, arc and surface tension driven forces can prevent pores, which causes porosity in final welded structures, escaping from the melt pool. Preliminary relations between power input levels, diffract force domination regimes, flow patterns and pool surface changes in fusion welds are suggested by considering the behavior of multiple weld pools. Keywords: Welding, X-ray imaging, Melt Poolhttp://www.sciencedirect.com/science/article/pii/S0264127520300678
collection DOAJ
language English
format Article
sources DOAJ
author Fan Wu
Ken Vidar Falch
Da Guo
Paul English
Michael Drakopoulos
Wajira Mirihanage
spellingShingle Fan Wu
Ken Vidar Falch
Da Guo
Paul English
Michael Drakopoulos
Wajira Mirihanage
Time evolved force domination in arc weld pools
Materials & Design
author_facet Fan Wu
Ken Vidar Falch
Da Guo
Paul English
Michael Drakopoulos
Wajira Mirihanage
author_sort Fan Wu
title Time evolved force domination in arc weld pools
title_short Time evolved force domination in arc weld pools
title_full Time evolved force domination in arc weld pools
title_fullStr Time evolved force domination in arc weld pools
title_full_unstemmed Time evolved force domination in arc weld pools
title_sort time evolved force domination in arc weld pools
publisher Elsevier
series Materials & Design
issn 0264-1275
publishDate 2020-05-01
description The flow within the melt pool during welding is a major factor that dictates the formation of the final fusion zone shape, solidification microstructure and defects. In this paper, we report the evolution sequence of the arc weld pool flow that observed via fast in-situ synchrotron X-ray imaging. Varying flow regimes attribute to the dominance of characteristic forces within the weld pool during rapid solid-liquid-solid phase transformation. Our analysis indicates the general sequence in the arc, surface tension and gravity driven force domination. Welding process parameters appear to influence significantly in determining the domination interval and the intensity of individual force. In some instances, arc and surface tension driven forces can prevent pores, which causes porosity in final welded structures, escaping from the melt pool. Preliminary relations between power input levels, diffract force domination regimes, flow patterns and pool surface changes in fusion welds are suggested by considering the behavior of multiple weld pools. Keywords: Welding, X-ray imaging, Melt Pool
url http://www.sciencedirect.com/science/article/pii/S0264127520300678
work_keys_str_mv AT fanwu timeevolvedforcedominationinarcweldpools
AT kenvidarfalch timeevolvedforcedominationinarcweldpools
AT daguo timeevolvedforcedominationinarcweldpools
AT paulenglish timeevolvedforcedominationinarcweldpools
AT michaeldrakopoulos timeevolvedforcedominationinarcweldpools
AT wajiramirihanage timeevolvedforcedominationinarcweldpools
_version_ 1724933032051212288