Dendritic growth in Mg-based alloys

Phase-field simulations and experimental verification by X-ray synchrotron tomography

Mingyue Wang, Yanjin Xu, Qiwei Zheng, Sujun Wu, Tao Jing, Nikhilesh Chawla

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Changes in polycrystalline dendritic growth patterns during solidification result in a variety of solidified dendritic structures and morphologies. These microstructural changes are induced by a variety of effects such as the random distribution of nucleation sites and orientations, the interaction of growing individual dendritic grains, and effects of solid-liquid interfacial energy anisotropy. Here, we have studied the formation of the complicated and diverse dendrite morphologies both experimentally, by electron backscatter diffraction and by X-ray tomography; and numerically by three-dimensional phase-field simulations. Three binary magnesium alloys were considered in this study: Mg-Al, Mg-Zn, and Mg-Sn alloys. We show that the solidification microstructure can be attributed to the following factors: The interaction of the growing dendrites, the anisotropy of the growth, and the distribution and initial random orientations of nucleation sites.

Original languageEnglish (US)
Pages (from-to)2562-2574
Number of pages13
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume45
Issue number5
DOIs
StatePublished - 2014

Fingerprint

dendrites
Synchrotrons
solidification
Tomography
Solidification
synchrotrons
Anisotropy
Nucleation
tomography
nucleation
X rays
anisotropy
Dendrites (metallography)
interfacial energy
Binary alloys
magnesium alloys
binary alloys
Magnesium alloys
statistical distributions
Interfacial energy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Metals and Alloys
  • Mechanics of Materials

Cite this

Dendritic growth in Mg-based alloys : Phase-field simulations and experimental verification by X-ray synchrotron tomography. / Wang, Mingyue; Xu, Yanjin; Zheng, Qiwei; Wu, Sujun; Jing, Tao; Chawla, Nikhilesh.

In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 45, No. 5, 2014, p. 2562-2574.

Research output: Contribution to journalArticle

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AU - Jing, Tao

AU - Chawla, Nikhilesh

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