Investigation of Start Block and Corresponding Influence for Grain Selection during Casting of Single-Crystal Superalloys

To figure out the impact of the parameters of a starter block (the diameter D and height H) on grain selection and the selecting mechanism, a spiral selector was measured with optical microscopy (OM) and electron backscatter diffraction (EBSD) during the solidification of Ni-based single crystal (SX...

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Detalles Bibliográficos
Autores principales: Zhu, Xintao, Wang, Fu, Wittenzellner, Tobias, Zhang, Shuaipeng, Hemes, Susanne, Mathes, Michael, Ma, Dexin, Bührig-Polaczek, Andreas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6566765/
https://www.ncbi.nlm.nih.gov/pubmed/31137839
http://dx.doi.org/10.3390/ma12101717
Descripción
Sumario:To figure out the impact of the parameters of a starter block (the diameter D and height H) on grain selection and the selecting mechanism, a spiral selector was measured with optical microscopy (OM) and electron backscatter diffraction (EBSD) during the solidification of Ni-based single crystal (SX) superalloys. In this experiment, starter blocks with diameters of 8 mm, 10 mm, 15 mm, and 30 mm and a height of 30 mm were designed to find the best parameters. Recommendations for optimizing starter block geometry are provided.

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