Dynamic aging in an Fe–Ni–Al alloy upon megaplastic deformation. Effect of the temperature and deformation rate

• Published in: Physics of metals and metallography Vol. 117; no. 8; pp. 805 - 816
• Main Authors: Shabashov, V. A., Sagaradze, V. V., Zamatovskii, A. E., Pilyugin, V. P., Kozlov, K. A., Litvinov, A. V., Kataeva, N. V.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.08.2016; Springer; Springer Nature B.V
• Subjects: Aging (metallurgy); Alloys; Austenitic stainless steels; Chemistry and Materials Science; Composition effects; Deformation; Diffusion; Dissolution; Dynamics; Intermetallic compounds; Intermetallics; Materials Science; Metallic Materials; Mossbauer spectroscopy; Phase Transformations; Precipitation (Meteorology); Specialty metals industry; Structure; intermetallic compounds; phase transitions; large plastic deformation; iron–nickel; Mössbauer spectroscopy
• ISSN: 0031-918X; 1555-6190
• DOI: 10.1134/S0031918X16080147

The method of Mössbauer spectroscopy has been used to investigate the effect of the temperature and the rate of megaplastic deformation on the processes of dissolution–precipitation of intermetallic compounds in aging austenitic alloy with a composition of Fe–36Ni–9Al. It has been established that, upon deformation in revolving Bridgman anvils, in the temperature range of cryogenic temperatures (liquid nitrogen) up to 573 K, a change occurs in the character of phase transitions from atomic disordering and the dissolution of intermetallic compounds to their additional accelerated precipitation. The factor that affects the kinetics of the processes of dissolution–precipitation of intermetallic compounds in the metallic matrix is dynamic aging. Dynamic aging is activated with an increase in the temperature and a decrease in the deformation rate.