Microstructural investigation of thermally aged nickel-­based superalloy 718Plus

Lawrence Whitmore; Mohammad Reza Ahmadi; Martin Stockinger; Erwin Povoden-Karadeniz; Ernst Kozeschnik; Harald Leitner

doi:10.1016/j.msea.2013.11.037

Microstructural investigation of thermally aged nickel-based superalloy 718Plus

Lawrence Whitmore^*, Mohammad Reza Ahmadi, Martin Stockinger, Erwin Povoden-Karadeniz, Ernst Kozeschnik, Harald Leitner

^*Korrespondierende/r Autor/-in für diese Arbeit

Institut für Werkstoffkunde, Fügetechnik und Umformtechnik (3030)

Publikation: Beitrag in einer Fachzeitschrift › Artikel › Begutachtung

Abstract

The effects of thermal aging upon the nickel-based 718Plus superalloy are investigated and modelled. Yield strength and micro-hardness measurements are made after solution annealing and after aging at 788 °C for 4 h. In order to explain the differences in strength and hardness, a detailed investigation of the microstructure is performed using transmission electron microscopy. The size and phase fraction of the γ′ precipitates are measured and related to the measured hardness and yield strength using a theoretical model of precipitation strengthening based on the shearing of precipitates in terms of coherency strengthening and the formation of an antiphase boundary.

Originalsprache	englisch
Seiten (von - bis)	253-259
Fachzeitschrift	Materials Science and Engineering A
Jahrgang	594
DOIs	https://doi.org/10.1016/j.msea.2013.11.037
Publikationsstatus	Veröffentlicht - 2014

Fields of Expertise

Advanced Materials Science

Zugriff auf Dokument

10.1016/j.msea.2013.11.037

Dieses zitieren

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abstract = "The effects of thermal aging upon the nickel-based 718Plus superalloy are investigated and modelled. Yield strength and micro-hardness measurements are made after solution annealing and after aging at 788 °C for 4 h. In order to explain the differences in strength and hardness, a detailed investigation of the microstructure is performed using transmission electron microscopy. The size and phase fraction of the γ′ precipitates are measured and related to the measured hardness and yield strength using a theoretical model of precipitation strengthening based on the shearing of precipitates in terms of coherency strengthening and the formation of an antiphase boundary.",

author = "Lawrence Whitmore and Ahmadi, {Mohammad Reza} and Martin Stockinger and Erwin Povoden-Karadeniz and Ernst Kozeschnik and Harald Leitner",

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AU - Whitmore, Lawrence

AU - Ahmadi, Mohammad Reza

AU - Stockinger, Martin

AU - Povoden-Karadeniz, Erwin

AU - Kozeschnik, Ernst

AU - Leitner, Harald

PY - 2014

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AB - The effects of thermal aging upon the nickel-based 718Plus superalloy are investigated and modelled. Yield strength and micro-hardness measurements are made after solution annealing and after aging at 788 °C for 4 h. In order to explain the differences in strength and hardness, a detailed investigation of the microstructure is performed using transmission electron microscopy. The size and phase fraction of the γ′ precipitates are measured and related to the measured hardness and yield strength using a theoretical model of precipitation strengthening based on the shearing of precipitates in terms of coherency strengthening and the formation of an antiphase boundary.

U2 - 10.1016/j.msea.2013.11.037

DO - 10.1016/j.msea.2013.11.037

M3 - Article

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JO - Materials Science and Engineering A

JF - Materials Science and Engineering A