Probing liquation cracking and solidification through modeling of momentum, heat, and solute transport during welding of aluminum alloys

S. Mishra, S. Chakraborty, T. Debroy

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

A transport phenomena-based mathematical model is developed to understand liquation cracking in weldments during fusion welding. Equations of conservation of mass, momentum, heat, and solute transport are numerically solved considering nonequilibrium solidification and filler metal addition to determine the solid and liquid phase fractions in the solidifying region and the solute distribution in the weld pool. An effective partition coefficient that considers the local interface velocity and the undercooling is used to simulate solidification during welding. The calculations show that convection plays a dominant role in the solute transport inside the weld pool. The predicted weld-metal solute content agreed well with the independent experimental observations. The liquation cracking susceptibility in Al-Cu alloy weldments could be reliably predicted by the model based on the computed solidifying weld-metal composition and solid fraction considering nonequilibrium solidification.

Original languageEnglish (US)
Article number094912
JournalJournal of Applied Physics
Volume97
Issue number9
DOIs
StatePublished - May 1 2005

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welding
aluminum alloys
solidification
solutes
momentum
heat
fusion welding
metals
supercooling
fillers
solid phases
conservation
partitions
mathematical models
liquid phases
convection
magnetic permeability
coefficients

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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Probing liquation cracking and solidification through modeling of momentum, heat, and solute transport during welding of aluminum alloys. / Mishra, S.; Chakraborty, S.; Debroy, T.

In: Journal of Applied Physics, Vol. 97, No. 9, 094912, 01.05.2005.

Research output: Contribution to journalArticle

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