Original scientific paper

Microstructural evolution of inconel 625 during thermal aging

S. Malej ; Institute of Metals and Technology, Ljubljana, Slovenia
J. Medved ; Faculty of Natural Sciences and engineering, Ljubljana, Slovenia
B. Š. Batič ; Institute of Metals and Technology, Ljubljana, Slovenia
F. Tehovnik ; Institute of Metals and Technology, Ljubljana, Slovenia
M. Godec ; Institute of Metals and Technology, Ljubljana, Slovenia

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››- Ni₃Nb phase in the γ matrix and δ-Ni₃Nb phase with M₂₃C₆ secondary carbides at the grain boundaries.

Keywords

inconel 625; thermal aging; precipitation; intermetallic phases; secondary carbides

Hrčak ID:

180972

URI

https://hrcak.srce.hr/180972

Publication date:

1.7.2017.

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