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Service life

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490001
EISBN: 978-1-62708-340-9
...Abstract Abstract The ability to accurately assess the remaining life of components is essential to the operation of plants and equipment, particularly those in service beyond their design life. This, in turn, requires a knowledge of material failure modes and a proficiency for predicting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610585
EISBN: 978-1-62708-303-4
... is filled from the bottom. (b) Improved design provides a path for the metal to follow as it fills the mold. Source: Ref 6 Fig. 24 Application-life diagram showing effects of increasing the severity of the service condition. Source: Ref 1 Fig. 26 General relationships between failure...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610147
EISBN: 978-1-62708-303-4
... ring groove. The eccentric pattern of oval beach marks indicates that the load on the shaft was not balanced; note final rupture area near left side. Source: Ref 15 Abstract Abstract This chapter discusses the factors that play a role in fatigue failures and how they affect the service life...
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
...Abstract Abstract This chapter provides a detailed overview of the creep behavior of metals and how to account for it when determining the remaining service life of components. It begins with a review of creep curves, explaining how they are plotted and what they reveal about the operating...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270173
EISBN: 978-1-62708-301-0
...Abstract Abstract A titanium alloy disc on the fourth stage of an aircraft engine compressor was found cracked in the course of a defect investigation. The disc had not yet reached the halfway point of its expected service life. The chapter explains how the crack was examined and provides...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310233
EISBN: 978-1-62708-286-0
... virtually disappeared while utilitarian uses have mushroomed, are any indication. The case for using stainless in appliances of all types, whether they are commercial or residential, relates to stainless being able to provide the best value over the intended service life. Stainless is without rival...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080003
EISBN: 978-1-62708-304-1
...Abstract Abstract This chapter explains how materials selection becomes much more difficult when designing for high-temperature corrosion environments. It also discusses the use of cladding and weld overlays to compensate for material deficiencies and prolong service life. corrosion...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300391
EISBN: 978-1-62708-323-2
... of lubrication and friction control, the relationship between viscosity and breakaway friction, and the factors that affect load-carrying capacity and service life. friction control industrial greases liquid lubricants solid-film lubricants DUNCAN DOWSON, a distinguished professor at the University...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610001
EISBN: 978-1-62708-303-4
.... The relationship among the design phase, testing, systematic failure analysis, and life assessment of components is shown in Fig. 4 . Fig. 4 Flow diagram showing the relationship between the design phase and the investigative tasks for in-service failure, structural aging, and fitness-for-service...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490183
EISBN: 978-1-62708-340-9
... on metallographic studies; methods based on temperature estimates; and a method for estimating remaining life under creep conditions based on stress-rupture testing of service-exposed material samples. The chapter also discusses the use of fracture mechanics and presents a number of cases in which life assessments...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250293
EISBN: 978-1-62708-345-4
...Abstract Abstract This chapter summarizes the various kinds of gear wear and failure and how gear life in service is estimated and discusses the kinds of flaws in material that may lead to premature gear fatigue failure. The topics covered are alignment, gear tooth, surface durability...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270003
EISBN: 978-1-62708-301-0
.... This is generally due to poor design, defective manufacture, and assembly faults of the system. In the next zone, representing the useful service life, the failures have a constant rate and are random. As the system ages beyond a certain service life, the failure rate increases again. This is the geriatric stage...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430409
EISBN: 978-1-62708-253-2
...Data on damage classification and expended life fraction of creep damage for boiler components Table 8.1 Data on damage classification and expended life fraction of creep damage for boiler components Stage of damage Microstructure Expended life fraction Stage 1 (service rendered...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060231
EISBN: 978-1-62708-343-0
..., the service pressurization media would be rich in hydrogen, and its potential embrittling effect would have to be accounted for. We will ignore the environmental aspect for the example calculations. Various effects of OPPT on subsequent service life of cyclically loaded pressure vessels have been...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540383
EISBN: 978-1-62708-309-6
... values. crack growth fatigue life fatigue spectrum spectrum editing FEW STRUCTURAL APPLICATIONS involve only constant-amplitude load cycles throughout their intended service life. In a series of loading events commonly known as a “spectrum,” the loading cycles can be very irregular...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300121
EISBN: 978-1-62708-323-2
... electric motors are reduced tribosystems and potential tribosystem failures. Essentially, anything that repetitively rubs or gets repetitively rubbed loses dimension or shape, and this size change can have an undesirable effect on the intended service life. If it is determined that friction and wear...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270019
EISBN: 978-1-62708-301-0
... component includes: Name of the component, identification number, manufacturer, and user Location Intended function Service life since new Service life since last overhaul Design loads, actual service loads, and load orientation Frequency of loading Service parameters...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910331
EISBN: 978-1-62708-250-1
....) Compatibility with existing equipment or fluids Maintainability Specification coverage Availability of design data Experience base with this or similar materials Selection considerations Expected total life or plant or process Estimated service life of material Reliability (safety...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060407
EISBN: 978-1-62708-261-7
... of automobile body parts to exhaust gases Affecting engine performance as little as possible Helping control undesirable exhaust emissions Having a service life that is acceptably long Having a reasonable cost, both as original equipment and as a replacement part In its basic form, the exhaust...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780051
EISBN: 978-1-62708-281-5
... service life is required? Is light weight desirable? Are there acceptance codes and specifications to be met? Do analogous applications exist? How is the part stressed in service? What is the magnitude of the stress? What is the stress versus time relationship? How much...