Metallographic Study and Repeatability Analysis of γ' Phase Precipitates in Cored, Thin-Walled Castings Made from IN713C Superalloy

Abstract

The study describes the influence of a surface modification in cored, thin-walled castings of blades from IN-713C nickel superalloy on γ' phase precipitates. The blades were produced by using the investment casting process in the laboratory conditions as parts for a low-pressure turbine rotor. The microstructural observations of the γ' phase precipitates on the cross sections of the blades were performed. The observations were followed by quantitative metallography evaluation, and finally, a comparison of the precipitates between one blade with the conventionally applied ceramic core and one with the core covered layer contained a surface modifier (5% of CoAl 2 O 4 ) was made.

Quality management in the methodology of designing rotation mechanisms for large-size machines

“…The methods described in the article are of interest to many technical areas, including engineering of production [19][20][21] and service [22][23][24] processes, biotechnology [25], coating technologies [26] and corrosion resistance [27,28]. They can also be inspiring for material sciences [29], mechanical analysis [30] and analytical methods [31,32].…”

Effect of Sr, Ti and B additions as powder and a preliminary alloy on elongation AlSi9Mg alloy

“…Modifying the mechanical properties of silumin is of great importance for many industries, including machine industry [21], thermally sustainable construction [22], construction of tribological pairs [23], construction of recovery devices [24]. The obtained dataset is also a valuable inspiration to improve the predictive models, especially the non-parametric ones [25,26].…”

THE effect of laser treatment on operational properties of ESD coatings

“…The methodology and results shown in this article by modifying the surface layer [10,11] may be useful for many industries, including corrosion protection in construction [12] and the production of agricultural machinery [13,14], strength improvement in railways [15][16][17], quality improvement in the automotive industry [18][19][20], metallurgy [21] and general production organization [22,23]. The results may have a particularly strong impact in the research area, including material [24][25][26], coating [27] and corrosive [28], but also mechanical [29,30]. Finally, the importance of such research for the purposes of military technology should not be forgotten [31].…”