Method for Assessing the Structural Stability of Refractory Nickel Alloys Based on Determination of Parameter PS of Phase Stability

• Published in: Metal science and heat treatment Vol. 64; no. 1-2; pp. 117 - 120
• Main Authors: Tyagunov, A. G., Tarasov, D. A., Milder, O. B., Savin, G. O.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.05.2022; Springer; Springer Nature B.V
• Subjects: Alloying; Analysis; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Dynamic stability; Engineering Thermodynamics; Heat and Mass Transfer; Heat resistant alloys; Materials Science; Metallic Materials; Methods; Nickel alloys; Nickel base alloys; Parameters; Phase stability; Refractory Alloys; Specialty metals industry; Stability analysis; Structural stability; Ultimate tensile strength; refractory nickel alloys; structural stability; temperature of complete dissolution; parameter of structural stability
• ISSN: 0026-0673; 1573-8973
• DOI: 10.1007/s11041-022-00770-5

Anew method for assessing the structural stability of nickel-base refractory alloys is suggested. The method is based on determination of the parameter of phase stability and allows for the dynamics of the degradation of structure and the temperature-and-time test conditions. The parameter of structural stability is computed using the results of a study of 300 grades of domestic and foreign heat-resistant nickel alloys. Dependences of the ultimate strength on the Larson–Miller parameter are plotted. It is shown that the new method reflects correctly the stability of the structure of refractory nickel alloys, especially those with a modern alloying system, as compared to conventional estimation of the temperature of complete dissolution of the main hardening phase.