Phase field modeling of solidification microstructure evolution during welding

The misorientation angle between the preferred crystalline orientation and the temperature gradient influences both the incubation time and the average wavelength of any initial instability during the planar growth stage, as well as the dendrite growth direction and the primary dendrite arm spacing...

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Bibliographic Details
Published inJournal of materials processing technology Vol. 255; pp. 285 - 293
Main Authors Yu, Fengyi, Wei, Yanhong, Ji, Yanzhou, Chen, Long-Qing
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.05.2018
Elsevier BV
Subjects
Al-Cu Alloy
Alloys
Computer simulation
Dendritic structure
Epitaxial growth
Interfaces
Microstructure
Misalignment
Morphology
Morphology evolution
Phase field method
Polycrystals
Preferred crystalline orientation
Seaweeds
Solidification
Solidification microstructure
Stability
Temperature gradients
Al-Cu Alloy
Preferred crystalline orientation
Solidification microstructure
Morphology evolution
Phase field method
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Summary:The misorientation angle between the preferred crystalline orientation and the temperature gradient influences both the incubation time and the average wavelength of any initial instability during the planar growth stage, as well as the dendrite growth direction and the primary dendrite arm spacing during the subsequent epitaxial growth stage. The solidification microstructure gradually changes from normal or tilted dendrites to a seaweed-like structure as the misorientation angle increases. The simulation of the initial wavelength, primary dendrite arm spacing and interface morphology are in general agreement with the experimental observations.
ISSN:0924-0136
1873-4774
DOI:10.1016/j.jmatprotec.2017.12.007