Matches in SemOpenAlex for { <https://semopenalex.org/work/W2039507972> ?p ?o ?g. }
Showing items 1 to 60 of
60
with 100 items per page.
- W2039507972 endingPage "629" @default.
- W2039507972 startingPage "623" @default.
- W2039507972 abstract "Significant research has been conducted in recent years on the �-based titanium aluminide alloys. The low density of �-TiAl relative to current nickel-based superalloys, has made it an attractive candidate for use in the low-pressure turbine blades of gas turbine engines [1]. In addition to weight savings, the lower density leads to higher specific stiffness and good high temperature strength retention [1,2,3]. However, the ordered crystal structure, typical of intermetallics, leads to inherently low room temper ature ductility and fracture toughness. This raises serious concerns about the ability of this material to resist the formation of cracks at impact damage sites, cracks that could subsequently grow in fatigue and lead to failure of the turbine blade. Of particular concern are cracks, which are perhaps too small to be detected, but may still grow under high cycle fatigue conditions. For large cracks, a long-crack fatigue crack growth threshold (�KTH) is an appropriate design criterion to ensure infinite fatigue life. However, in the case of very small damage levels on the order of a few equiaxed gamma grains or less, �KTH fails to accurately portray the threshold for crack propagation [4,5,6]. For a fine grained duplex microstructure, the sub-threshold growth of small cracks can be collapsed with long-crack data by using the closure corrected �Keff stress intensity to define the crack tip driving force. Small cracks are generally dormant at stress intensities below �Keff,TH. However, experiments on a coarse lamellar microstructure suggested that scatter in the small crack threshold was still observed despite correction for closure due to statistical sampling of the larger lamellar colonies [7]. Consequently, the relative size of the dominant microstructural feature can be crucially important in determining the relevant fatigue threshold stress intensity range. The present study investigates the change in fatigue crack threshold with the size of cracks resulting from simulated impact damage in a duplex �-TiAl alloy tested at 600°C. This work is part of a larger effort to support the transition of �-TiAl to industrially relevant gas turbine engine applications." @default.
- W2039507972 created "2016-06-24" @default.
- W2039507972 creator A5021759891 @default.
- W2039507972 creator A5047929595 @default.
- W2039507972 date "2000-09-01" @default.
- W2039507972 modified "2023-10-16" @default.
- W2039507972 title "Fatigue thresholds of cracks resulting from impact damage to γ-TiAl" @default.
- W2039507972 cites W1974945258 @default.
- W2039507972 cites W1994611376 @default.
- W2039507972 cites W1997384370 @default.
- W2039507972 cites W1999025774 @default.
- W2039507972 cites W2001916420 @default.
- W2039507972 cites W2006376650 @default.
- W2039507972 cites W2011320374 @default.
- W2039507972 cites W2086038961 @default.
- W2039507972 doi "https://doi.org/10.1016/s1359-6462(00)00470-x" @default.
- W2039507972 hasPublicationYear "2000" @default.
- W2039507972 type Work @default.
- W2039507972 sameAs 2039507972 @default.
- W2039507972 citedByCount "10" @default.
- W2039507972 countsByYear W20395079722013 @default.
- W2039507972 countsByYear W20395079722014 @default.
- W2039507972 countsByYear W20395079722021 @default.
- W2039507972 countsByYear W20395079722022 @default.
- W2039507972 crossrefType "journal-article" @default.
- W2039507972 hasAuthorship W2039507972A5021759891 @default.
- W2039507972 hasAuthorship W2039507972A5047929595 @default.
- W2039507972 hasBestOaLocation W20395079722 @default.
- W2039507972 hasConcept C127413603 @default.
- W2039507972 hasConcept C159985019 @default.
- W2039507972 hasConcept C191897082 @default.
- W2039507972 hasConcept C192562407 @default.
- W2039507972 hasConcept C77595967 @default.
- W2039507972 hasConceptScore W2039507972C127413603 @default.
- W2039507972 hasConceptScore W2039507972C159985019 @default.
- W2039507972 hasConceptScore W2039507972C191897082 @default.
- W2039507972 hasConceptScore W2039507972C192562407 @default.
- W2039507972 hasConceptScore W2039507972C77595967 @default.
- W2039507972 hasIssue "7" @default.
- W2039507972 hasLocation W20395079721 @default.
- W2039507972 hasLocation W20395079722 @default.
- W2039507972 hasOpenAccess W2039507972 @default.
- W2039507972 hasPrimaryLocation W20395079721 @default.
- W2039507972 hasRelatedWork W1994103032 @default.
- W2039507972 hasRelatedWork W2051270029 @default.
- W2039507972 hasRelatedWork W2082293200 @default.
- W2039507972 hasRelatedWork W2137307547 @default.
- W2039507972 hasRelatedWork W2380293314 @default.
- W2039507972 hasRelatedWork W2943188944 @default.
- W2039507972 hasRelatedWork W3008690834 @default.
- W2039507972 hasRelatedWork W4242480814 @default.
- W2039507972 hasRelatedWork W4285802202 @default.
- W2039507972 hasRelatedWork W4317433637 @default.
- W2039507972 hasVolume "43" @default.
- W2039507972 isParatext "false" @default.
- W2039507972 isRetracted "false" @default.
- W2039507972 magId "2039507972" @default.
- W2039507972 workType "article" @default.