In situ metallic porous structure formation due to ultra high heating and cooling rates during an electromagnetic pulse welding

Porous structure formation resulted at the interface of electromagnetic pulse welded joints are investigated and revealed, to identify the development of sub-micron to few micron sized pores due to ultra high rate of heating and cooling. Collision velocity along the overlapping length was predicted...

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Bibliographic Details
Published inScripta materialia Vol. 128; pp. 10 - 13
Main Authors Sapanathan, T., Raoelison, R.N., Buiron, N., Rachik, M.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.02.2017
Subjects
Coalescing
Cooling rate
Electromagnetic pulses
Formations
Heating
High speed impact
Interface
Nucleation
Numerical prediction
Pores
Porosity
Thermomechanical effect
Ultra high heating
Ultra high heating
Thermomechanical effect
Pores
High speed impact
Interface
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Summary:Porous structure formation resulted at the interface of electromagnetic pulse welded joints are investigated and revealed, to identify the development of sub-micron to few micron sized pores due to ultra high rate of heating and cooling. Collision velocity along the overlapping length was predicted using a multi-physics numerical simulation and subsequently this velocity field was used to estimate the heating and cooling rates as about 109°Cs−1. Predicted temperature, pressure and strain variations clearly evidence the observations of porous structure formation that is potentially facilitated by sequential phenomena of pores nucleation, coalescence and growth within the molten intermediate phase. [Display omitted]
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2016.09.030