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Microstructural evolution of inconel 625 during thermal aging

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2017

Year

Simon Malej, Jožef Medved, Barbara Šetina Batič, F. Tehovnik, Matjaž Godec
University of Zagreb University Computing Centre (SRCE)

Abstract

Inconel 625 is due to alloying elements prone to precipitation of different intermetallic phases and secondary carbides during thermal aging. The base of investigation is nickel superalloy Inconel 625 in hot rolled state. Thermal aging was conducted at temperature 650 °C with different duration of treatment for each sample. Microstructural analysis was performed by light microscope and scanning electron microscope. The results of microstructure observation showed the precipitation of intermetallic γ››- Ni<sub>3</sub>Nb phase in the γ matrix and δ-Ni<sub>3</sub>Nb phase with M<sub>23</sub>C<sub>6</sub> secondary carbides at the grain boundaries.