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Ruttert, Benjamin and Meid, Carla and Mujica Roncery, Lais and Lopez-Galilea, Inmaculada and Bartsch, Marion and Theisen, Werner (2018) Effect of porosity and eutectics on the high-temperature low-cycle fatigue Performance of a nickel-base single-crystal superalloy. Scripta Materialia, 155, pp. 139-143. Elsevier. DOI: 10.1016/j.scriptamat.2018.06.036 ISBN ISSN: 1359-6462 ISSN 1359-6462
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Official URL: https://www.sciencedirect.com/science/article/pii/S1359646218304007?via%3Dihub
Abstract
This work investigates the separate influence of porosity and γ/γ′-eutectics on the low-cycle fatigue life of a single-crystal Ni-base superalloy at high temperatures. A conventional vacuum furnace heat-treatment but also integrated heat-treatments in a hot isostatic press are applied to produce different material variants of the same alloy. High-resolution electron microscopy revealed that both pores and γ/γ′-eutectics act as crack starters, thus initiating early failure. Moreover, the results indicate that remaining γ/γ′-eutectics can weaken the fatigue resistance even more than pores. Furthermore, the results confirm the beneficial effect of proper integrated hot isostatic pressing heat-treatments on the fatigue Performance.
| Item URL in elib: | https://elib.dlr.de/123404/ | |||||||||||||||||||||
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| Document Type: | Article | |||||||||||||||||||||
| Title: | Effect of porosity and eutectics on the high-temperature low-cycle fatigue Performance of a nickel-base single-crystal superalloy | |||||||||||||||||||||
| Authors: |
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| Date: | 26 June 2018 | |||||||||||||||||||||
| Journal or Publication Title: | Scripta Materialia | |||||||||||||||||||||
| Refereed publication: | Yes | |||||||||||||||||||||
| In SCOPUS: | Yes | |||||||||||||||||||||
| In ISI Web of Science: | Yes | |||||||||||||||||||||
| Volume: | 155 | |||||||||||||||||||||
| DOI : | 10.1016/j.scriptamat.2018.06.036 | |||||||||||||||||||||
| Page Range: | pp. 139-143 | |||||||||||||||||||||
| Publisher: | Elsevier | |||||||||||||||||||||
| ISSN: | 1359-6462 | |||||||||||||||||||||
| ISBN: | ISSN: 1359-6462 | |||||||||||||||||||||
| Status: | Published | |||||||||||||||||||||
| Keywords: | Electron backscatter diffraction (EBSD); Hot isostatic pressing (HIP); Low-cycle fatigue; Microstructure; Single-crystal superalloy | |||||||||||||||||||||
| HGF - Research field: | Aeronautics, Space and Transport | |||||||||||||||||||||
| HGF - Program: | Aeronautics | |||||||||||||||||||||
| HGF - Program Themes: | propulsion systems | |||||||||||||||||||||
| DLR - Research area: | Aeronautics | |||||||||||||||||||||
| DLR - Program: | L ER - Engine Research | |||||||||||||||||||||
| DLR - Research theme (Project): | L - Virtual Engine and Validation methods | |||||||||||||||||||||
| Location: | Köln-Porz | |||||||||||||||||||||
| Institutes and Institutions: | Institute of Materials Research > Experimental and Numerical Methods | |||||||||||||||||||||
| Deposited By: | Bartsch, Dr.-Ing. Marion | |||||||||||||||||||||
| Deposited On: | 20 Nov 2018 09:04 | |||||||||||||||||||||
| Last Modified: | 20 Nov 2018 09:04 |
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