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creep-fatigue crack growth rate

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Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002389
EISBN: 978-1-62708-193-1
... parameter for correlating creep crack growth over the regime from small-scale creep to extensive creep conditions for creep-ductile materials. The average value of C t , ( C t ) avg , is used for characterizing the average crack growth rate, ( da / dt ) avg , in creep-fatigue experiments ( Ref 56 , 57...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002352
EISBN: 978-1-62708-193-1
... temperature Unstable microstructures and small grain size increase creep rates Ruptures occur after long exposure times Verify proper alloy (a) Fractographers often refer to “overload fracture” as a way to distinguish the failure from fatigue or stress-corrosion crack growth. However, a true overload...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003307
EISBN: 978-1-62708-176-4
... Abstract Predicting the service life of structural components involves creep-fatigue crack growth (CFCG) testing under pure creep conditions. This article provides a discussion on the loading condition and the type of ductile and brittle material showing creep behavior. It focuses...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003317
EISBN: 978-1-62708-176-4
... should be used when elevated-temperature FCGR and creep-fatigue interaction are of interest (see appendix to this article, “High-Temperature Fatigue Crack Growth Testing” ) or when testing in aqueous environments ( Ref 32 ). Five types of FCGR tests are used in laboratories today. How the specimen...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002360
EISBN: 978-1-62708-193-1
... Abstract This article describes the fracture mechanics in fatigue. It discusses the fatigue crack growth rate (FCGR) testing that consists of several steps, beginning with selecting the specimen size, geometry, and crack length measurement technique. The two major aspects of FCGR test analysis...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003309
EISBN: 978-1-62708-176-4
... such specimens are small and easy to machine and handle. Instead of using fatigue precrack, a machined notch-root is sometimes done to lower the cost and to give less ambiguous environmental conditions at the crack tip. A common practice used in crack growth rate tests to prevent the crack from branching...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003314
EISBN: 978-1-62708-176-4
... will be described later. As a rule, cracks that develop during testing are not measured, nor are the test parameters intentionally altered owing to the presence of cracking. The topic of fatigue crack propagation testing of alloys is discussed in the articles “Fatigue Crack Growth Testing” and “Creep Crack Growth...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005411
EISBN: 978-1-62708-196-2
... . 7. Bain K.R. , “Creep Crack Growth Rates of Rene-95 in Air and Pure Argon,” M.S. Thesis, Massachusetts Institute of Technology, February 1982 . 8. Hall D.E. , McDowell D.L. , and Saxena A. , Crack Tip Parameters for Creep-Brittle Crack Growth , Fatigue...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002410
EISBN: 978-1-62708-193-1
... are summarized. The article also discusses the effects of microstructure and extrinsic parameters on fatigue crack propagation (FCP). It details the modeling of FCP rates and creep and creep-fatigue crack growth rates. creep creep-fatigue crack growth rate fatigue fatigue crack propagation fracture...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002357
EISBN: 978-1-62708-193-1
... – 99 94. Ohji K. , Kubo S. , and Nakai Y. , Near-Threshold Fatigue Crack Growth Behavior at High Temperatures , Creep: Characterization, Damage and Life Assessments , ASM International , 1992 , p 379 – 388 95. Makhlouf K. and Jones J.W. , Near-Threshold...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002355
EISBN: 978-1-62708-193-1
... Abstract This article presents an overview of fatigue crack nucleation from the point of view of the material microstructure and its evolution during cycling. It describes the sites of microcrack nucleation at the free surfaces. The article discusses the relation of dislocation structures...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005737
EISBN: 978-1-62708-171-9
... consist of an airfoil section and a dovetail joint. The dovetail joint connects the blade to the turbine disk. The rotating blades are under more stress than the vanes due to the centrifugal forces exerted on the blades. Creep can be a problem, which is why new alloys and processing techniques have...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002390
EISBN: 978-1-62708-193-1
.... Ainsworth R.A. et al. , CEGB Assessment Procedure for Defects in Plant Operating in the Creep Range , Fatigue Fract. Eng. Mater. Struct. , Vol 10 ( No. 2 ), 1987 41. Shih T.T. and Clarke G.A. , Effect of Temperature and Frequency on the Fatigue Crack Growth Rate Properties...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003666
EISBN: 978-1-62708-182-5
.... The simplest method of providing a constant load consists of a deadweight hung on one end of the specimen. This method is particularly useful for wire specimens. For specimens of larger cross section, however, lever systems such as those used in creep-testing machines are more practical. The primary advantage...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003313
EISBN: 978-1-62708-176-4
... Abstract The separation of the fatigue process into crack initiation and propagation phases has been an important and useful advance in engineering. The combined approach of strain-control testing and the development fracture mechanics of fatigue crack growth rates is a key advance that allows...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003517
EISBN: 978-1-62708-180-1
... fraction rule Parameter-based assessments Thermal-mechanical fatigue (TMF) Coating evaluations Hardness testing Microstructural evaluations Creep cavitation damage assessment Oxide-scale-based life prediction High-temperature crack growth methods In any component...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002403
EISBN: 978-1-62708-193-1
... embrittlement. It also describes the effect of environment on fatigue crack growth rate. austenitic stainless steel corrosion fatigue duplex stainless steel embrittlement fatigue crack growth rate fatigue endurance limits ferritic stainless steel fracture properties martensitic stainless steel...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002397
EISBN: 978-1-62708-193-1
... Abstract This article summarizes the metallurgy of carbon and alloy steels, followed by discussions on their major mechanical properties, namely, static fracture toughness, dynamic fracture toughness, fatigue or sustained-load crack growth rates, and fatigue or sustained-load thresholds...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002382
EISBN: 978-1-62708-193-1
... fracture mechanics and plastic fracture mechanics is discussed in the article “Residual Strength of Metal Structures” in this Volume. In this article it is assumed that crack growth is predominantly by fatigue rather than by corrosion, creep, or other mechanisms. This does not exclude the combination...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002417
EISBN: 978-1-62708-193-1
... concentrations also offers a capability to introduce controlled fatigue precracks in brittle materials prior to the determination of fracture toughness, creep crack growth, or fatigue crack growth in tension. An advantage of this technique is that fatigue cracks can be introduced in brittle solids...