The Precipitation Processes and Mechanical Properties of Aged Inconel 718 Alloy after Annealing

• Autorzy: Maj P. , Adamczyk-Cieślak B. , Slesik M. , Mizera J. , Pieja T. , Sieniawski J. , Gancarczyk T. , Dudek S.

Identyfikatory

DOI

10.1515/amm-2017-0259

• Języki publikacji: EN

Abstrakty

EN

Inconel 718 is a precipitation hardenable nickel-iron based superalloy. It has exceptionally high strength and ductility compared to other metallic materials. This is due to intense precipitation of the γ’ and γ” strengthening phases in the temperature range 650-850°C. The main purpose of the authors was to analyze the aging process in Inconel 718 obtained in accordance with AMS 5596, and its effect on the mechanical properties. Tensile and hardness tests were used to evaluate the mechanical properties, in the initial aging process and after reheating, as a function of temperature and time respectively in the ranges 650°-900°C and 5-480 min. In addition, to link the mechanical properties with the microstructure transmission microscopy observations were carried out in selected specimens. As a result, factors influencing the microstructure changes at various stages of strengthening were observed. The authors found that the γ’’ phase nucleates mostly homogenously in the temperature range 650-750°C, causing the greatest increase in strength. On the other hand, the γ’ and δ phases are formed heterogeneously at 850°C or after longer annealing in 800°C, which may weaken the material.

Słowa kluczowe

EN

inconel 718; mechanical properties; heat treatment

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2017
• Tom: Vol. 62, iss. 3
• Strony: 1695--1702
• Opis fizyczny: Bibliogr. 36 poz., rys., tab., wykr.

Twórcy

autor

Maj P.

• Warsaw University of Technology, Faculty of Materials Science and Engineering, 141 Wołoska Str., 02-507 Warsaw, Poland

autor

Adamczyk-Cieślak B.

• Warsaw University of Technology, Faculty of Materials Science and Engineering, 141 Wołoska Str., 02-507 Warsaw, Poland

autor

Slesik M.

• Warsaw University of Technology, Faculty of Materials Science and Engineering, 141 Wołoska Str., 02-507 Warsaw, Poland

autor

Mizera J.

• Warsaw University of Technology, Faculty of Materials Science and Engineering, 141 Wołoska Str., 02-507 Warsaw, Poland

autor

Pieja T.

• Pratt & Whitney Rzeszów S.A., Hetmańska 120 35-078 Rzeszow, Poland

autor

Sieniawski J.

• Rzeszów University of Technology, Department of Materials Science, 2 Wincentego Pola Str.35-959 Rzeszow, Poland

autor

Gancarczyk T.

• Pratt & Whitney Rzeszów S.A., Hetmańska 120 35-078 Rzeszow, Poland

autor

Dudek S.

• Pratt & Whitney Rzeszów S.A., Hetmańska 120 35-078 Rzeszow, Poland

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Uwagi

EN

1. Financial support of the National Center for Research and Development in the program INNOLOT CASELOT INNOLOT/I/9/NCBR/2013 is gratefully acknowledged.

PL

2. Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).