LAUSR

The nickel-base superalloy Inconel 718, have excellent properties to be used in high temperature applications, its principal characteristics are: high resistance to oxidation, good mechanical properties in elevated work temperatures, owing of that the principal applications are in parts of aeronautic and aerospace engines [1-2]. During the last two decades, research on the effects of rare earths in superalloys has made significant progress. The use of elements like rhenium, hafnium, tantalum, niobium, ruthenium among others has increased, due to the need to obtain superalloys with properties superior to the current ones. It has been reported that some rare earth elements such as yttrium and cerium have positive effects both in the hardening mechanism by solid solution. This due to an increase in the lattice mismatch, as in the grain limit, and modification of carbides and eutectic phases; which significantly improves the properties of these alloys at elevated temperatures. Yttrium has been applied successfully in many fields of research such as metallurgy, chemistry and surface engineering. However, the use of cerium / lanthanum in superalloys has not been satisfactorily explored although studies indicate that they are elements with high potential for the improvement of mechanical and microstructural properties [3].