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assisted crack growth

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090191
EISBN: 978-1-62708-266-2
... Abstract Irradiation-assisted stress-corrosion cracking (IASCC) has been a topic of engineering interest since it was first reported in the 1960s, having been observed in stainless steel cladding on light water reactor fuel elements. This chapter summarizes the results of decades...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090317
EISBN: 978-1-62708-266-2
... stresses that occurs during the overaging process. 12.1 Manifestations and Methods of Characterization Environmentally assisted cracking in uranium and uranium alloys manifests itself as reductions in ductility during short-term tensile testing and as time-dependent formation and/or growth of cracks...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030148
EISBN: 978-1-62708-282-2
... steels are not usable in hydrogen environments. Threshold stress intensities and crack growth rates are a function of the specific hydrogen environments, with H 2 S being one of the most severe environments ( Fig. 6 ). At lower yield strengths, the mechanism for hydrogen-assisted failure apparently...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090443
EISBN: 978-1-62708-266-2
... testing Specific Test Methods ASTM E399-12e3: Standard test method for linear-elastic plane-strain fracture toughness of K Ic of metallic materials (gives sample dimensions and methods utilized to obtained threshold and crack growth rate data during stress corrosion testing). ASTM E1682-02...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030126
EISBN: 978-1-62708-282-2
... in the electrolyte) and for hydrogen-assisted crack growth resulting from the reduction of hydrogen ions at the crack tip. Thermodynamics of SCC The thermodynamic conditions for anodically assisted SCC are that dissolution or oxidation of the metal and its dissolution in the electrolyte must...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540297
EISBN: 978-1-62708-309-6
... assisted crack growth under sustained tensile loading. That means da/dN and da/dt are interchangeable (after converting the time-based da/dt to the cycle-based da/dN , and vice versa). Many curve-fitting equations were developed to fit the da/dt data and used for converting to da/dN . Conclusive...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.9781627082662
EISBN: 978-1-62708-266-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930163
EISBN: 978-1-62708-359-1
... cracking, hydrogen-induced cracking, and other environmentally assisted failure modes. High-temperature creep includes creep rupture and creep crack growth. This article discusses each of these categories, as well as the benefits of a fitness-for-service approach. Fracture Mechanics...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490329
EISBN: 978-1-62708-340-9
... stress cracking Toughness Slow crack growth Environment-assisted crack growth Toughness Flow localization Fatigue-crack-growth rate Corrosion Hydrogen attack Strength and creep resistance Toughness Allowable Stress Allowable design stresses for pressure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090001
EISBN: 978-1-62708-266-2
... requirements both for anodically assisted SCC (where crack propagation depends either directly or indirectly on the oxidation of metal atoms from the crack tip and their dissolution in the electrolyte) and for hydrogen-assisted crack growth resulting from the reduction of hydrogen ions at the crack tip...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030070
EISBN: 978-1-62708-282-2
... 687 10.5006/1.3287699 20. Young L.M. , “ Microstructural Dependence of Aqueous-Environment Assisted Crack Growth and Hydrogen Uptake in Alloy 7050, ” Ph.D. dissertation, University of Virginia, Aug 1999 21. Young G.A. , “ Hydrogen Environment Assisted Cracking of an Al-Zn...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030003
EISBN: 978-1-62708-282-2
... Abstract This chapter provides an introduction to various forms of corrosion, namely uniform corrosion, localized corrosion, mechanically assisted degradation, environmentally induced cracking, microbiologically influenced corrosion, and metallurgically influenced corrosion. uniform...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030117
EISBN: 978-1-62708-282-2
..., depending primarily on the particular metal-environment combination. The environment may affect the probability of fatigue crack initiation, the fatigue crack growth rate, or both. Figure 23 shows an example of corrosion fatigue failure in a Ti-6Al-4V alloy. Fig. 23 Corrosion fatigue of a Ti-6Al-4V...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130111
EISBN: 978-1-62708-284-6
... The process of fracture, in general terms, can be described in terms of the mechanisms of crack initiation and/or crack extension (growth). Different mechanisms may occur for crack initiation and the subsequent process of crack growth. For example, crack extension may occur by the brittle mechanism...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090367
EISBN: 978-1-62708-266-2
... corrosion to crack initiation and growth with no separation of stages, or there may be a repeated succession of short steps of initiation and growth. In any event, from an engineering standpoint, it is convenient to view the process in two generic stages: initiation and propagation. Such terminology is used...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610303
EISBN: 978-1-62708-303-4
.... The chapter describes some of methods used to determine maximum permissible crack size and predict growth rates. It explains how the information can then be used to control fractures through periodic inspection, fail-safe features, mandated retirement, and proof testing. It presents a number of fracture...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870099
EISBN: 978-1-62708-299-0
... Abstract Environmentally assisted cracking is a generic term that includes various cracking phenomena such as stress-corrosion cracking (SCC), corrosion fatigue cracking, and liquid-metal embrittlement. This chapter describes these cracking mechanisms beginning with SCC and the factors...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610501
EISBN: 978-1-62708-303-4
... the susceptibility to SCC. Stress-corrosion cracking occurs by subcritical crack growth involving crack initiation at selected sites, crack propagation, and finally overload fracture of the remaining section. Failure by SCC is frequently encountered in seemingly mild chemical environments at tensile stresses well...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490059
EISBN: 978-1-62708-340-9
... how to deal with time dependent deformation in design, how to estimate cumulative damage under changing conditions, and how to assess the effect of multiaxial stress based on uniaxial test data. It also includes information on rupture ductility, creep fracture, and creep-crack growth and their effect...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780417
EISBN: 978-1-62708-281-5
...-rich regions, where river patterns are not usually noted. Both river patterns and matrix feathering are not only indicative of mode I tension loading in brittle composite materials, but have also been noted to be indicative of crack-growth direction. Crack-growth direction can be ascertained by noting...