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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Solid State Precipitation
Presentation Title Kinetics of Discontinues Precipitation upon Age-hardening of Deformed and Recrystallized Invar-Sn Alloys
Author(s) Maryam Akhlaghi, Olena Volkova
On-Site Speaker (Planned) Maryam Akhlaghi
Abstract Scope Fe-Ni Invar alloy is well recognized for its remarkable dimensional stability upon temperature variations. In order to enhance the mechanical performance of this material at high temperatures, alloying elements such as Sn is added to the binary alloy. Development of alloying element precipitates upon age-hardening increases the strength and hardness of this material. In this research, evolution of precipitation upon age-hardening of the deformed and recrystallized ternary Fe-Ni-Sn alloys has been investigated. Upon prolonged age-hardening of both microstructures, the tiny semi-coherent precipitates are replaced by the lamellar microstructure, so-called discontinues precipitate (DP), consisting of the incoherent coarse precipitates and the matrix. Kinetics of DP development upon age-hardening of both microstructures have been traced and compared using X-ray diffraction technique. Faster progress of DP reaction during age-hardening of the recrystallized specimens as compared to the deformed ones has been associated with the easier migration of DP reaction boundaries in recrystallized materials.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

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