Titanium Nitride (TiN) Germination and Growth during Vacuum Arc Remelting of a Maraging Steel
Vincent Descotes, Thibault Quatravaux, Jean‐Pierre Bellot, Sylvain Witzke, Alain Jardy
Abstract
During the processing of maraging steels, Titanium easily combines with Nitrogen to form nitride inclusions, known to be deleterious for fatigue properties of the alloy. According to thermodynamic calculations, the precipitation occurs during solidification of the vacuum arc remelted (VAR) ingot. A coupled model of titanium nitride (TiN) inclusion precipitation and vacuum remelting has been set-up to study the inclusion cleanliness of the ingot. The nitrogen content, nuclei numeral density and solidification time appear as the key factors which control the inclusion size.
Topics & Concepts
MetallurgyMaterials scienceTinIngotTitanium nitrideNitrideTitaniumMaraging steelPrecipitationFerrosiliconAlloyTitanium alloySuperalloyComposite materialPhysicsMeteorologyLayer (electronics)Metallurgical Processes and ThermodynamicsHigh-Temperature Coating BehaviorsMetal and Thin Film Mechanics