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Thermal fatigue fracture

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Published: 01 December 2003
Fig. 3 Thermal fatigue failure and conventional fatigue crack propagation fracture during reversed load cycling of acetal. Source: Ref 10 More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430325
EISBN: 978-1-62708-253-2
... tube fatigue, including mechanical or vibrational fatigue, corrosion fatigue, thermal fatigue, and creep-fatigue interaction. It discusses the causes, characteristics, and impacts of each type and provides several case studies. boiler tubes corrosion fatigue creep-fatigue interaction fatigue...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630237
EISBN: 978-1-62708-270-9
... or its absence and the patterns on the fracture surface. Thermal Fatigue Fatigue may be caused either by cyclic mechanical stressing or by cyclic thermal stressing. Thermal-fatigue cracks are the result of repeated heating and cooling cycles, producing alternate expansion and contraction. When...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610415
EISBN: 978-1-62708-303-4
... at temperatures greater than approximately 0.3 to 0.5 of the absolute melting point. In creep, thermal activation enables plastic deformation at stresses below those needed to deform the lattice without thermal activation. When a metal is placed under a constant load, it stretches elastically but also gradually...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780249
EISBN: 978-1-62708-281-5
... frequency is also found to cause fatigue fracture by conventional crack propagation at high stress amplitude. The interrelation of the two mechanisms, stress amplitude and frequency, for polyoxymethylene (acetal) is shown in Fig. 3 ( Ref 10 ). Fig. 3 Thermal fatigue failure and conventional fatigue...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240243
EISBN: 978-1-62708-251-8
.... It describes the most effective methods of improving fatigue life. The chapter also explains the effect of geometrical stress concentrations on fatigue. In addition, it explores the environmental effects of corrosion fatigue, low-temperature fatigue, high-temperature fatigue, and thermal fatigue. Finally...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060385
EISBN: 978-1-62708-261-7
...-Induced Failures High temperature and stress are common operating conditions for various parts and equipment in a number of industries. The principal types of elevated-temperature mechanical failure are creep and stress rupture, stress relaxation, low-cycle or high-cycle fatigue, thermal fatigue...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610001
EISBN: 978-1-62708-303-4
... are often performed to predict when the next internal or external inspection should be performed. Typical life-limiting mechanisms include stress-corrosion cracking, fatigue, and thermal fatigue. Welded structures that could initiate a crack are often susceptible to these mechanisms. The leak-before-break...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630117
EISBN: 978-1-62708-270-9
... Abstract Fatigue fractures are generally considered the most serious type of fracture in machinery parts simply because fatigue fractures can and do occur in normal service, without excessive overloads, and under normal operating conditions. This chapter first discusses the three stages...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490111
EISBN: 978-1-62708-340-9
..., and frequency) and factors such as temperature, material defects, component geometry, and processing history. It provides a detailed overview of the damage mechanisms associated with high-cycle and low-cycle fatigue as well as thermal fatigue, creep-fatigue, and fatigue-crack growth. It also demonstrates...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870325
EISBN: 978-1-62708-344-7
.... Because large hysteresis loops can develop in polymers, the energy dissipated per cycle as heat may be considerably larger than in metals. And, also because of polymer’s low thermal conductivity, temperatures tend to become higher in localized regions, especially at cracks developed by fatigue. Even small...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630035
EISBN: 978-1-62708-270-9
... in the beam. Fig. 1 Spontaneous residual stress fracture in a 40-ft-long I-beam under no external load. Source: Ref 1 Residual stresses are defined as those stresses that are internal or locked into a part or assembly, even though the part or assembly is free from external forces or thermal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040295
EISBN: 978-1-62708-300-3
... to be manufactured. The second most common cause of die failure is fatigue fracture. Fatigue occurs as the result of the continual stress cycles that the dies are subjected to. The stress cycles are attributed to both mechanical and thermal loading and unloading of the dies. Fatigue is accelerated in the vicinity...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060231
EISBN: 978-1-62708-343-0
... place? Was this a case of mechanical fatigue, environmentally assisted fatigue, thermal fatigue, brittle fracturing, stress-corrosion cracking, improper machining and fabrication processes, or improper alloy chemistry or heat treatment? What had been the mission loading history of the disk prior...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2022
DOI: 10.31399/asm.tb.isceg.t59320207
EISBN: 978-1-62708-332-4
..., and the graphite network provides a path for fracture under loads, reducing the mechanical properties. Ductile iron with unconnected and distributed nodules displays relatively higher strength but has inferior thermal conductivity. CGI that displays a graphite morphology that is worm-like in shape is a three...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490265
EISBN: 978-1-62708-340-9
... materials and designs with improved thermal fatigue resistance. This chapter will review the material-property requirements, damage mechanisms, and damage-assessment procedures for the key components of the steam turbine. Damage mechanisms and the general principles of remaining-life assessment for steam...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1985
DOI: 10.31399/asm.tb.sagf.t63420085
EISBN: 978-1-62708-452-9
... exerting a high amount of thrust. Figure 4-27(a) is an example of high end thrust that resulted in frictional heat. The thermal expansion and contraction initiated a large number of radial cracks that progressed as a fatigue fracture ( Fig. 4-27b ) both into the bore of the part and along the roots...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610327
EISBN: 978-1-62708-303-4
... components, burner nozzles, heat exchanger heating elements, noniron metallurgy insulating parts, thermal barrier coatings Mechanical Long-term, high-temperature resistance, fatigue, thermal shock, wear resistance Wear parts; sealings; bearings; cutting tools; engine, motor, and gas turbine parts...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430147
EISBN: 978-1-62708-253-2
...-side erosion: Soot blower erosion Fly ash erosion Coal particle erosion Falling slag erosion Erosion due to steam cutting Fatigue: Mechanical fatigue Thermal fatigue Corrosion fatigue Creep-fatigue interaction Operation failures: Failures due to operational...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130241
EISBN: 978-1-62708-284-6
...). These problems have been sufficiently dealt with in the technical literature. In the process of searching for methods to increase fatigue resistance, there are some constant elements that have a favorable effect, including enhancing treatments such as thermal, thermochemical, as well as surface work...