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Updated: Jan 27, 2026

Determining the Mechanical Strength of Ultra-Fine-Grained Metals
Published on: November 22, 2021
Development of a High-Efficiency Z-Form Selector for Single Crystal Blades and Corresponding Grain Selection
Xintao Zhu1, Fu Wang2, Dexin Ma3
1Foundry Institute, RWTH Aachen University, Intzestrasse 5, 52072 Aachen, Germany. zhudb8@gmail.com.
Abstract:
Single crystal (SX) is widely used in modern turbine blades to improve the creep fracture, fatigue, oxidation, and coating properties of the turbine, so that the turbine engine has excellent performance and durability. In this paper, the single crystal super alloy MM247LC is used as the research material. The evolution of grain structure in a two-dimensional grain selector was studied by directional experiments, and the mechanism of grain selection in the two-dimensional channel during directional solidification was clarified. In order to optimize the production process of single crystal turbine blades, the effects of the geometrical structure of a Z-type separator (i.e., wire diameter and take-off angle) on the crystal orientation, microstructure, and grain efficiency of blades were discussed.
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