On the Influence of Alloy Composition on Creep Behavior of Ni-Based Single-Crystal Superalloys (SXs)

Horst OM, Ibrahimkhel S, Streitberger J, Wochmjakow N, Git P, Scholz F, Thome P, Singer R, Körner C, Frenzel J,  Eggeler G (2020)


Publication Language: English

Publication Type: Conference contribution

Publication year: 2020

Publisher: Springer Science and Business Media Deutschland GmbH

Pages Range: 60-70

Conference Proceedings Title: Minerals, Metals and Materials Series

Event location: Seven Springs, PA US

ISBN: 9783030518332

DOI: 10.1007/978-3-030-51834-9_6

Abstract

In the present work, three Ni-based single-crystal superalloys (SXs) were investigated, a Re-containing alloy ERBO/1 (CMSX-4 type) and two Re-free SXs referred to as ERBO/15 and ERBO/15-W, which differ in W content. The microstructural evolution of the three alloys during heat treatment and their creep behavior is investigated. When one applies one heat treatment to all three alloys, one obtains different γ/γ′-microstructures. Subjecting these three alloys to creep in the high-temperature low-stress creep regime, ERBO/15 outperforms ERBO/1. In order to separate the effects of alloy chemistry and microstructure, the kinetics of the microstructural evolution of the three alloys was measured. The results were used to establish similar microstructures in all three alloys. Comparing ERBO/15 with ERBO/15-W, it was found that in ERBO/15-W particles grow faster during the first precipitation heat treatment and that ERBO/15-W creeps significantly faster. At constant microstructures, ERBO/15 and ERBO/1 show similar creep behavior. In the high-temperature and low-stress creep regime, ERBO/15 shows lower minimum creep rates but ERBO/1 features a slower increase of creep rate in the tertiary creep regime. It was also found that in the high-temperature low-stress creep regime, ERBO/1 shows a double minimum creep behavior when particles are small.

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APA:

Horst, O.M., Ibrahimkhel, S., Streitberger, J., Wochmjakow, N., Git, P., Scholz, F.,...  Eggeler, G. (2020). On the Influence of Alloy Composition on Creep Behavior of Ni-Based Single-Crystal Superalloys (SXs). In Sammy Tin, Mark Hardy, Justin Clews, Jonathan Cormier, Qiang Feng, John Marcin, Chris O'Brien, Akane Suzuki (Eds.), Minerals, Metals and Materials Series (pp. 60-70). Seven Springs, PA, US: Springer Science and Business Media Deutschland GmbH.

MLA:

Horst, O. M., et al. "On the Influence of Alloy Composition on Creep Behavior of Ni-Based Single-Crystal Superalloys (SXs)." Proceedings of the 14th International Symposium on Superalloys, Superalloys 2021, Seven Springs, PA Ed. Sammy Tin, Mark Hardy, Justin Clews, Jonathan Cormier, Qiang Feng, John Marcin, Chris O'Brien, Akane Suzuki, Springer Science and Business Media Deutschland GmbH, 2020. 60-70.

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