Influence of Carbon Addition on Structure and Thermal Properties of Cast Superinvar Alloys

Deformation induced Elinvar behavior in Fe-Ni Invar alloy

“…Numerous studies revealed that structural factors such as compositions, heterogeneities, metallurgical and mechanical treatments could exert impact on Invar and Elinvar behaviors [5][6][7]. Particularly, incorporating alloying elements such as Ti and C could influence the temperature dependence of elastic modulus or thermal expansion, owing to precipitations [5] or solid solution [6].…”

“…Theoretical and experimental studies have been carried out to explain the Invar and Elinvar behaviors from magnetic [2,3] or structural [4] aspects, while no agreement has been reached due to the lack of convincing evidence. Accordingly, ascertaining influencing factors, structural or magnetic, may open a new avenue of understanding such behaviors.Numerous studies revealed that structural factors such as compositions, heterogeneities, metallurgical and mechanical treatments could exert impact on Invar and Elinvar behaviors [5][6][7]. Particularly, incorporating alloying elements such as Ti and C could influence the temperature dependence of elastic modulus or thermal expansion, owing to precipitations [5] or solid solution [6].…”

“…Accordingly, ascertaining influencing factors, structural or magnetic, may open a new avenue of understanding such behaviors.Numerous studies revealed that structural factors such as compositions, heterogeneities, metallurgical and mechanical treatments could exert impact on Invar and Elinvar behaviors [5][6][7]. Particularly, incorporating alloying elements such as Ti and C could influence the temperature dependence of elastic modulus or thermal expansion, owing to precipitations [5] or solid solution [6]. Actually, even in the regime of binary Fe-Ni system, independent Invar and Elinvar alloys could be fabricated by regulating composition, specifically, 36 at% Ni for Invar and 45 at% Ni for Elinvar [7].…”