NDLI: Numerical analysis of thermal cycle characteristics and prediction of microstructure in multi-pass UWW

Content Provider	Springer Nature Link
Author	Pan, Jiajing Yang, Lijun Hu, Shengsun Chai, Shuo
Copyright Year	2015
Abstract	Underwater wet welding process has been widely used in assembling and maintaining marine structures, due to its economy and versatility. However, it is difficult to understand the physical phenomenon during wet welding, especially when water environment makes this fleeting process even more complicated. It is necessary to get a deeper understanding of wet welding process by numerical analysis and thus provide theoretical references for process selection. A customized experiment platform was set up for multi-pass wet welding of the grooved butt joint of E36 steel. Besides, a hybrid heat source consisting of double ellipsoid heat source and Gaussian heat source was selected for numerical analysis of multi-pass underwater wet welding. This paper introduced the pool boiling heat transfer theory in numerical simulation of underwater wet welding process and proved to be applicable. The results of numerical analysis show that the profiles of calculated molten pools match well with those obtained by the experiment. A notable effect of water environment on thermal cycle characteristics is especially demonstrated by the comparison of cooling time t 8/5. In this study, the calculated t 8/5 values near the fusion zone are lowered so markedly that a result of full martensite transformation can be expected in E36 steel, which coincides well with the actual microstructure in its heat-affected zone.
Starting Page	1095
Ending Page	1102
Page Count	8
File Format	PDF
ISSN	02683768
Journal	The International Journal of Advanced Manufacturing Technology
Volume Number	84
Issue Number	5-8
e-ISSN	14333015
Language	English
Publisher	Springer London
Publisher Date	2015-09-09
Publisher Place	London
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Multi-pass wet welding Numerical analysis Pool boiling heat transfer Thermal cycle characteristics Industrial and Production Engineering Production Mechanical Engineering Computer-Aided Engineering (CAD, CAE) and Design
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Mechanical Engineering Computer Science Applications Software

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