Uniformity of the Dendritic Microstructure in Large-Sized Single-Crystal Superalloy Blades

• Published in: Metallurgical and materials transactions. A, Physical metallurgy and materials science Vol. 54; no. 7; pp. 2507 - 2511
• Main Authors: Zhang, Chao, Huang, Taiwen, Zhang, Zhicheng, Zhang, Jiachen, Liu, Dingyuan, Zhang, Jun, Liu, Lin
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-07-2023; Springer Nature B.V
• Subjects: Arrays; Brief Communication; Characterization and Evaluation of Materials; Chemistry and Materials Science; Directional solidification; Geometry; Materials Science; Metallic Materials; Microstructure; Nanotechnology; Polygons; Simulation; Single crystals; Solidification; Structural Materials; Superalloys; Surfaces and Interfaces; Tessellation; Thin Films; Trailing edges; Turbines; Voronoi graphs
• ISSN: 1073-5623; 1543-1940
• DOI: 10.1007/s11661-023-06963-8

The distribution of the dendrite arrays and the primary dendrite arm spacing (PDAS) in large-sized single-crystal superalloy blade was investigated by Voronoi tessellation. The dendrite arrays were hexagonal at the airfoil center and random at the trailing edge. The PDAS was gradually increased from the leading edge (about 370 
μ
m) to the trailing edge (about 500 
μ
m). With the solidification distance increasing, the PDAS in large-sized blade was decreased (about 380 
μ
m) at the middle blade.