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environmentally enhanced crack growth

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090341
EISBN: 978-1-62708-266-2
... produce immediate failure. It describes crack growth mechanisms, explains how to measure crack growth rates and predict time to failure, and provides crack growth data for a number of materials and environments. ceramics environmentally enhanced crack growth glass stress-corrosion cracking...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030126
EISBN: 978-1-62708-282-2
... with important fracture features. stress-corrosion cracking crack initiation crack propagation crack growth rate STRESS-CORROSION CRACKING (SCC) describes service failures in engineering materials that occur by slow environmentally induced crack propagation. The observed crack propagation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090001
EISBN: 978-1-62708-266-2
... diffusion, and adsorption may be rate limiting, as well as the rate of bulk transport to the crack tip ( Ref 1.14 , 1.15 ). Several different environmental parameters are known to influence the rate of crack growth in aqueous solutions. These include, but are not limited to: Temperature...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780323
EISBN: 978-1-62708-281-5
..., it has been observed that a small amount of dissolution of PE occurs in detergents. The absorption of alcohols is also observed ( Ref 41 , 42 ). It has been argued that the environmental cracking of PE can be described by the three-region crack growth model ( Ref 27 , 41 ). The constant crack speed...
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
... pressure is created that enhances void growth or initiates cracking. This model, although apparently reasonable for blistering and possibly appropriate for some aspects of loss in tensile ductility, does not explain many of the factors observed for classes of failure such as hydrogen stress cracking...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780417
EISBN: 978-1-62708-281-5
... regarding crack initiation site, crack-growth direction, environmental conditioning, and failure mode. It should be noted, however, that even with the large amount of fractographic data that have become available in recent years, it still may not be possible to always determine the failure cause...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090191
EISBN: 978-1-62708-266-2
..., the international consensus is that the three with the greatest impact on crack growth rates are the formation of material defects, radiation-induced segregation, and chemical reactions that increase the corrosion potential of water. The chapter discusses each of these in great detail, and includes information...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630257
EISBN: 978-1-62708-270-9
... with increasing yield strength and is related to the environmentally enhanced crack growth threshold, K IEAC , of the environment material system under consideration. This emphasizes the need to conduct fracture-toughness and fatigue-crack growth-rate tests in environments that may be encountered in actual...
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...
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 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 2003
DOI: 10.31399/asm.tb.cfap.t69780238
EISBN: 978-1-62708-281-5
... ). In general, as the molecular weight of the polymer is increased, the fatigue resistance of the polymer is enhanced. Some polymers (as mentioned earlier) are susceptible to craze nucleation that leads to subsequent crack growth and fatigue failure. Figure 10(a) schematically illustrates the load-bearing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090067
EISBN: 978-1-62708-266-2
... for dislocation motion at the crack tip. In this way, the local plastic-flow process associated with crack propagation is eased. Strong experimental support for enhanced plasticity has come from Birnbaum’s experiments using an environmental cell in the transmission electron microscope, or TEM ( Ref 3.16 ). Direct...
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 July 2000
DOI: 10.31399/asm.tb.fec.t65940271
EISBN: 978-1-62708-302-7
...). Rupture also may be due to stresses and the presence of environmental conditions incapable of immediate film repair. The rupture propagates into the underlying metal and is sustained by the concentration of stress at the leading edge of the crack and by corrosion mechanisms associated with a crevice...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030117
EISBN: 978-1-62708-282-2
... crack propagation generally are enhanced by increased stress ratio, R , which is the ratio of the minimum stress to the maximum stress. Stress ratio has only a slight influence on fatigue crack growth rates in a benign environment. Electrode Potential Electrode potential, similar to loading...
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 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 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090043
EISBN: 978-1-62708-266-2
... of corrosion can be detected (except possibly for SCC itself). As described elsewhere in this book, stress-corrosion cracking is defined as environmentally induced subcritical crack growth under the influence of static or dynamic tensile stress ( Ref 2.1 ). Three factors must be present, simultaneously...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310027
EISBN: 978-1-62708-286-0
... the influence of material and environmental variables on stress-corrosion cracking (SCC) and the mechanisms proposed for SCC in stainless steel, comparing the mechanism of SCC with hydrogen embrittlement. In addition, it provides information on biocorrosion and microbiologically induced corrosion in ambient...