期刊
CRYSTAL RESEARCH AND TECHNOLOGY
卷 51, 期 10, 页码 602-609出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/crat.201600165
关键词
Phase-field; dendrite growth; forced flow; Weld; Al-Cu alloy
资金
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Fundamental Research Funds for the Central Universities [NP2016204]
- National Natural Science Foundation of China [51175253]
A quantitative phase-field model for directional solidification is applied to study dendrite growth under forced flow conditions in an Al-Cu Gas Tungsten Arc (GTA) welding molten pool. Evolution of the dendrite morphology and the solute field under forced flow conditions is simulated. Growth of columnar grains goes through three periods, including the initial instability period, the competitive growth period and the relatively stable period. The solute segregation, the solute redistribution and the solute concentration in the liquid side of the interface are investigated, respectively. For the given conditions, simulation results are in good agreement with experimental findings.
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