The effect of casting conditions on the high-cycle fatigue properties of the single-crystal nickel-base superalloy PWA 1483

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Singer R, Lamm M
Zeitschrift: Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science
Verlag: MINERALS METALS MATERIALS SOC
Jahr der Veröffentlichung: 2007
Band: 38A
Heftnummer: 6
Seitenbereich: 1177-1183
ISSN: 1073-5623
Sprache: Englisch


Abstract


Different solidification conditions are employed to produce sets of single-crystal samples with different primary dendrite arm spacings, i.e., 600 mu m, 400 mu m, and 250 mu m. The material with the smaller dendrite arm spacing is shown to possess considerably increased high-cycle fatigue life. Fatigue cracks are found to originate from shrinkage porosity rather than from carbides, in which the size of the largest pores in the samples scales with the primary dendrite arm spacing. Fatigue life can be rationalized using a fracture mechanics approach based on a Kitagawa-Takahashi plot. The impact of the results with respect to the development of new commercial casting processes that produce higher temperature gradients and cooling rates will be discussed.



FAU-Autoren / FAU-Herausgeber

Singer, Robert Prof. Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)


Zitierweisen

APA:
Singer, R., & Lamm, M. (2007). The effect of casting conditions on the high-cycle fatigue properties of the single-crystal nickel-base superalloy PWA 1483. Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, 38A(6), 1177-1183. https://dx.doi.org/10.1007/s11661-007-9188-4

MLA:
Singer, Robert, and Matthias Lamm. "The effect of casting conditions on the high-cycle fatigue properties of the single-crystal nickel-base superalloy PWA 1483." Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science 38A.6 (2007): 1177-1183.

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