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crack propagation resistance

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780238
EISBN: 978-1-62708-281-5
... arise from contact between asperities or from fiber bridging in reinforced or blended polymers. Fiber bridging has been shown to be a viable shielding mechanism in short fiber composites ( Ref 19 ). In summary, extrinsic shielding mechanisms can be used to improve resistance to fatigue crack propagation...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2022
DOI: 10.31399/asm.tb.mbheaktmse.t56030001
EISBN: 978-1-62708-418-5
.... , and Lewandowski J.J. , Fracture Toughness and Fatigue Crack Growth Behavior of As-Cast High-Entropy Alloys , Jom-Us , Vol 67 , 2015 , p 2288 – 2295 10.1007/s11837-015-1563-9 66. Iacoviello F. and Di Cocco V. , Sintered Stainless Steels: Fatigue Crack Propagation Resistance under...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780249
EISBN: 978-1-62708-281-5
... the rate of FCP at a particular value of Δ K . The higher the da / dN , the lower the FCP resistance. Alternatively, the higher the Δ K for a particular da / dN , the more resistant the material is supposed to be. Fig. 9 Fatigue crack propagation behavior of various polymers. PSU, polysulfone...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090257
EISBN: 978-1-62708-266-2
... (a) intergranular crack propagation in the furnace-cooled alloy and (b) transgranular propagation in the water-quenched material. Source: Ref 9.26 The effect of heat treatment on SCC may also depend on the SCC environment. Artificial aging of cold rolled AZ61 sheet improved SCC resistance when tested...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870099
EISBN: 978-1-62708-299-0
... of crack propagation in the fracture plane). Source: Ref 8 Alloy Selection for SCC Resistance In general, high-purity aluminum and low-strength aluminum alloys are not susceptible to SCC. Occurrence of SCC is chiefly confined to higher-strength alloy classes, such as 2 xxx and 7 xxx alloys...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820177
EISBN: 978-1-62708-339-3
... propagation. Resistance to SSC is usually improved through the use of PWHT and through the use of lower-carbon-equivalent plate steels and quenched-and-tempered wrought steels. Hydrogen-Induced Cracking Once atomic hydrogen has diffused into the material, it can also recombine to form molecular...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270067
EISBN: 978-1-62708-301-0
... concluded that the nickel-base superalloy blade was exposed to high temperatures and stresses, initiating a crack that propagated under cyclic loading. This chapter provides a summary of the investigation and the insights acquired using scanning electron fractography, metallography, and hardness...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780404
EISBN: 978-1-62708-281-5
... in failure analysis in addition to the commonly accepted fracture surface studies. As was briefly shown in preceding paragraphs, vital information about the resistance of the material to crack propagation and its loading history can easily be decoded from a thinned section normal to the crack-propagation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090333
EISBN: 978-1-62708-266-2
... and veinlike modes. The crack-nucleation sites, from which cracks propagated into the specimen, had granular patterns, as did those in cathodically polarized specimens. Failure at corrosion and anodic potentials was also regarded as hydrogen embrittlement. Fig. 13.2 Variation of stress-corrosion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060385
EISBN: 978-1-62708-261-7
... or at preexisting defects in the component. In these cases, the time required for the intiation and propagation of these cracks represents the useful life of the component. This involves assessment of fracture resistance rather than a strength assessment based on bulk creep rates and time to stress rupture...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780323
EISBN: 978-1-62708-281-5
... stresses ( Ref 3 ). It has been proposed that the fibrils in a very short craze, which forms at the crack tip, are exposed to the chemically aggressive environment. The hydrolytic cleavage of the exposed macromolecules causes failure of the fibrils, followed by crack propagation. The failure mechanism...
Image
Published: 01 December 2003
) A, interlaminar crack propagation; B, fiber cracking; C, fiber-matrix debonding; and D, fiber fracturing. (a3) A, fiber fracturing. (b) Ideal composite for high abrasive wear resistance. L , normal load; V , velocity; PEEK, polyetheretherketone. Source: Ref 32 More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240221
EISBN: 978-1-62708-251-8
... into two or more pieces under the action of stress. Fracture can be classified into two broad categories: ductile fracture and brittle fracture. As shown in the Fig. 13.1 comparison, ductile fractures are characterized by extensive plastic deformation prior to and during crack propagation. Brittle...
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
.... The chapter presents a case history that illustrates the use of fracture mechanics in failure analysis. An appendix provides a more detailed discussion of fracture mechanics concepts. crack propagation failure analysis fracture mechanics linear-elastic fracture mechanics plane strain plane stress...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030193
EISBN: 978-1-62708-349-2
...× objective. (b) Area ahead of the crack tip. Transmitted polarized light, full wave plate, 40× objective Toughened Thermoset-Matrix Composite Failure Mechanisms The damage resistance of composite materials is affected by the ability of the matrix to absorb impact energy and resist crack propagation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090349
EISBN: 978-1-62708-266-2
... of the welding process. When the chromium content in the austenite grain boundaries is reduced from the bulk concentration of 18 wt% to 12 wt% or less, passivation or resistance to corrosion is lost. This leads to initiation sites for intergranular SCC, and crack propagation follows the grain boundary...
Image
Published: 01 December 2003
Fig. 11 Comparison of fatigue crack propagation behavior in the Paris regime for several amorphous and semicrystalline polymers. Note enhanced fatigue resistance of the semicrystalline polymers. PC, polycarbonate; PMMA, polymethyl methacrylate; PPO, polypropylene oxide; PVF, polyvinyl formal More
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 November 2012
DOI: 10.31399/asm.tb.ffub.t53610501
EISBN: 978-1-62708-303-4
... be very effective, provided that the base metal is completely and uniformly coated without pinholes, cracks, scratches, abrasions, and the like. For example, plating steel with lead or tin is very effective in corrosion resistance, unless the coating has some locations that are open to the base metal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610209
EISBN: 978-1-62708-303-4
... transformation at the crack tip during fracture, thus increasing the fracture resistance. The strengthening lost by the elimination carbides is replaced by precipitation of fine (Fe,Ni) 3 Ti phases from martensite obtained by aging. However, under certain conditions, precipitation of phases at grain boundaries...