Continuous Morphological Transition and Its Mechanism of Al3Ni Phase at the Liquid–Solid Interface During Solidification

The morphological transition and growth mechanism of Al 3 Ni phase during solidification at the liquid Al/solid Ni interface was investigated through synchrotron radiography. The remelted peritectic Al 3 Ni is dominated by coalescence of adjacent grains and precipitation with the morphology changing...

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Bibliographic Details
Published in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2019-02, Vol.50 (2), p.556-561
Main Authors: Ding, Zongye, Hu, Qiaodan, Lu, Wenquan, Zhang, Naifang, Ge, Xuan, Cao, Sheng, Yang, Tianxing, Xia, Mingxu, Li, Jianguo
Format: Article
Language:English
Subjects:
Aluminum
Characterization and Evaluation of Materials
Chemistry and Materials Science
Coalescing
Communication
Materials Science
Metallic Materials
Morphology
Nanotechnology
Nickel
Radiography
Solidification
Solids
Structural Materials
Surfaces and Interfaces
Synchrotron radiation
Thin Films
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Summary:The morphological transition and growth mechanism of Al 3 Ni phase during solidification at the liquid Al/solid Ni interface was investigated through synchrotron radiography. The remelted peritectic Al 3 Ni is dominated by coalescence of adjacent grains and precipitation with the morphology changing from columnar, irregular, scallop type to faceted shape. The hollow proeutectic Al 3 Ni is formed on a solid base. The increased r / R ratio and steep variation lead to the change from regular to irregular hollowness with asymmetrical shape.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-018-5059-4