Very high cycle fatigue durability of an additively manufactured single-crystal Ni-based superalloy

Bortoluci Ormastroni LM, Lopez-Galilea I, Pistor J, Ruttert B, Körner C, Theisen W, Villechaise P, Pedraza F, Cormier J (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Additive Manufacturing Elsevier

Book Volume: 54

Article Number: 102759

DOI: 10.1016/j.addma.2022.102759

Abstract

A single crystalline (SX) nickel-based superalloy additively manufactured (AM) by electron beam-based powder bed fusion (PBF-E) was investigated under very high cycle fatigue (VHCF) at 1,000 °C in fully reversed conditions (Rε = −1). Specimens processed using a classical Bridgman solidification route and the impact of a hot isostatic pressing (HIP) treatment were also considered. It is shown that the fatigue lifetime of the AM specimens is higher or in the same range of the Bridgman processed ones with the same chemical composition. All defect-free AM samples fail by surface initiation with very long VHCF lives. In the absence of metallurgical defects such as grain boundaries or pores, the superalloy chemical stability against oxidation governs VHCF failure.

Authors with CRIS profile

Julian Pistor Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle) Carolin Körner Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)

Involved external institutions

Université de La Rochelle FR France (FR) Ecole Nationale Supérieure de Mécanique et d´Aérotechnique (ISAE-ENSMA) FR France (FR) Ruhr-Universität Bochum (RUB) DE Germany (DE)

How to cite

APA:

Bortoluci Ormastroni, L.M., Lopez-Galilea, I., Pistor, J., Ruttert, B., Körner, C., Theisen, W.,... Cormier, J. (2022). Very high cycle fatigue durability of an additively manufactured single-crystal Ni-based superalloy. Additive Manufacturing, 54. https://dx.doi.org/10.1016/j.addma.2022.102759

MLA:

Bortoluci Ormastroni, Luciana Maria, et al. "Very high cycle fatigue durability of an additively manufactured single-crystal Ni-based superalloy." Additive Manufacturing 54 (2022).

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