Abstract
IN 713C cast superalloy is investigated in the work. Light microscopy, scanning electron microscopy observations, and quantitative microstructural measurements of carbides are needed to display if there are differences in carbides occurring in IN 713C casts from two kinds of shell mold materials used during casting. The impact of major constituents of two shell molds (zirconium silicate (ZrSiO4) and aluminosilicate (mAl2O3 * nSiO2)) on the morphology, size, and volume fraction as well as chemical composition of carbides in the investigated castings of the IN 713C superalloy was presented. The results affirmed that the conditions of crystallization (the variable wall thickness of the casting and material of the shell) of the IN 713C castings influence the microstructure, especially the size, morphology, and volume fraction of carbides in the material.
Highlights
Nickel-based superalloys exhibit good surface stability, corrosion and oxidation resistance, and mechanical strength and resistance to creep at high temperature which depends on the chemical composition of the material, its structure and technological process
The chemical composition of the Inconel 713C (IN 713C) both as-received and after the investment casting process was measured by the Arc-Spark Emission Spectrometry technique (Table 1)
The c-grains, c/MC eutectic material, c/c¢ eutectic material, carbides, and c¢ precipitates distributed within the c-matrix are observed in the microstructure of the investigated IN 713C superalloy castings
Summary
Nickel-based superalloys exhibit good surface stability, corrosion and oxidation resistance, and mechanical strength and resistance to creep at high temperature which depends on the chemical composition of the material, its structure and technological process. Journal of Materials Engineering and Performance macrostructure of the IN 713C alloy is composed of frozen and columnar equiaxial grains with precipitates of primary carbides inside the grains and on the grain boundaries. In this type of structure, cracks may form and result in fatal failure of the aircraft engines (Ref 6, 7). The amount, size, and shape of the primary carbide precipitation is determined by the carbon content of the alloy, amount of minor elements present, and by the melting history, i.e., the pouring temperature, cooling rate, and mold temperature (Ref 8). The observations and the quantitative evaluation of the carbides proposed in the work is a part of the broad spectrum of investigations into the castings, including evaluation of grain size, porosity, c¢ phase, and c + c¢ eutectic phase in addition to the quantitative description of carbides
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
