The single crystal superalloy with different C contents was casted using master alloy of DD6 in the directionally solidified furnace. The effect of C content on the microstructure of the second generation single crystal superalloy was investigated. The results show that C content has no obvious effect on the dendrite arm spacing. With the increase of C content, the volume fraction and size of γ/γ' eutectic decrease. However, the volume fraction of carbide increases, and its morphologies change from blocky shape to frame work-like and Chinese-script-like with the increase of C content. With the increase of carbon content, the segregation of Ta decreases while the segregation of Re, W, Mo, Nb increases. C content has no obvious effect on the shape and size of γ' phase in as cast microstructure or after heat treatment. The morphology of carbide has no distinct change after heat treatment.
Effect of C Content on Microstructure of Second Generation Single Crystal Superalloy
2017
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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