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.
Highlights
Single crystal super alloys, especially nickel-based super alloys, are widely used in the manufacture of engine blades due to their excellent creep resistance and high temperature strength [1,2,3]
Some studies [6,7,8,9] have shown that the geometric shape of the grain selector has an important influence on the selection efficiency of grains and the orientation of grains
The purpose of the Z-type selector is only to select a single grain, and the efficiency of the selector largely depends on the thickness and the departure angle
Summary
Especially nickel-based super alloys, are widely used in the manufacture of engine blades due to their excellent creep resistance and high temperature strength [1,2,3]. The resulting single crystal structure and Bridgeman furnace using a directional solidification processes, which are the most commonly used industrial products and single crystal products studied. The with influence of the backscattering diffraction and and optical microscopy On this basis, the influence of the wasbackscattering quantitatively analyzed by using scanning electron microscopy equipped electron quantitatively analyzed by using scanning electron microscopy (SEM) equipped with electron thickness and take-off angle of the selector on the experimental results is discussed, and thickness and take-off angle of the selector on the experimental results is discussed, and the backscattering diffraction (EBSD) and optical microscopy (OM).
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
