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stress-life curve

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Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006807
EISBN: 978-1-62708-329-4
... studies on heater tube creep testing and remaining-life assessment, and pressure vessel time-dependent stress analysis showing the effect of stress relaxation at hot spots. creep curve creep testing elevated-temperature life assessment heater tubes high-temperature components hydrogen attacks...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001852
EISBN: 978-1-62708-241-9
..., and area reduction have been obtained. Fatigue properties including cyclic curve, strain-life and stress-life curves, and Coffin-Manson parameters have also been acquired. Fractography of the fractures/failed test sample’s surfaces, examination of the microstructure of the electroformed nickel tool...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006819
EISBN: 978-1-62708-329-4
... Board , Washington, D.C. , 2010 26. Yahr G.T. , “ Fatigue Design Curves for 6061-T6 Aluminum ,” Oak Ridge National Laboratory , Oak Ridge, TN , 1993 27. Dowling N.E. , “ Mean Stress Effects in Stress Life and Strain Life Fatigue ,” Second SAE Brasil International Conference...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003545
EISBN: 978-1-62708-180-1
... decrease in curves of log stress versus log rupture life. Oxides and nitride formed on the surfaces of the intercrystalline cracks that occur extensively during tertiary creep. Observed interconnection of the bulk of these cracks added substantially to strengthening against creep deformation in the late...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006780
EISBN: 978-1-62708-295-2
... for nickel. Source: Ref 21 Fig. 15 Logarithmic plot of stress-rupture stress versus rupture life for nickel-base alloy U-700 at 815 °C (1500 °F). The increasing slope of the curve to the right of the sigma break is caused by sigma-phase formation. Fig. 6 Creep life assessment based...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003517
EISBN: 978-1-62708-180-1
... crack initiation or crack propagation or even total fatigue life. For fatigue crack initiation, the alternating stress ( S ) versus the number of cycles ( N ) to fail is typically represented by an S - N curve. For fatigue life, accounting for the elastic and plastic behavior, strain-life approach may...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003512
EISBN: 978-1-62708-180-1
...-concentration factor. Stress-concentration factors for various geometric details are derived from the theory of elasticity and/or obtained experimentally. Stress-concentration curves are available for different design geometries ( Ref 25 ). These curves are useful when investigating a design and doing a life...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003516
EISBN: 978-1-62708-180-1
..., and stress history on the life of a component. For fracture mechanics methods, material behavior is described by fracture toughness and crack growth rate data, and geometry is defined through a dimensionless β factor. For traditional fatigue methods such as the stress-life method, an S - N curve, which...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001788
EISBN: 978-1-62708-241-9
... extrusion of Al-6063 billet material. They were examined to identify critical fatigue failure locations, determine corresponding stresses and strains, and uncover correlations with process parameters, design features, and life cycle data. The fatigue damage models are based on Morrow’s stress and strain...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006802
EISBN: 978-1-62708-329-4
.... Stress-concentration factors for various geometric details are derived from the theory of elasticity and/or obtained experimentally. Stress-concentration curves are available for different design geometries ( Ref 30 ). These curves are useful when investigating a design and doing a life assessment...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001758
EISBN: 978-1-62708-241-9
... Materials , pp. 133 – 134 ( 1976 ) 4. Boyer H.E. : Atlas of Creep and Stress Rupture Curves , 3.5 – 3.6 . ASM International ( 1998 ) 5. DiCristoforo P.E. , Elledge M. : Stress redistribution for increased creep life in the GE MS6001 B second-stage blade . J. Eng. Gas...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003546
EISBN: 978-1-62708-180-1
... of a ship through stress analysis and fracture mechanics analyses of the casing. fracture mechanics residual life prediction stress analysis thermomechanical fatigue turbine casing THERMOMECHANICAL FATIGUE (TMF) refers to the process of fatigue damage under simultaneous changes in temperature...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006779
EISBN: 978-1-62708-295-2
... design concepts Table 1 Methods and material characteristics for fatigue design concepts Design philosophy Design concept Material characteristics Safe-life, infinite-life Nominal stress or local stress concept S - N curve, S a = f ( N F ) Fatigue diagram, S a = f ( S...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003515
EISBN: 978-1-62708-180-1
... encountered damage mechanism ( Ref 8 ), and over time, two major design philosophies have been employed: safe-life (based on either stress versus life-cycle curves or strain versus life-cycle curves) ( Ref 9 ) and damage tolerant (based on fracture mechanics) ( Ref 9 , 10 , 11 ). Situations in which...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001596
EISBN: 978-1-62708-225-9
... , 12 The underlying life distribution, f (T; σ ) , of the Inverse Power Law is assumed to be consistent with a Weibull distribution, with a stress dependent scale parameter, η ( σ ) , and a constant shape parameter, β, which is independent of the applied stress level within the design limits...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003500
EISBN: 978-1-62708-180-1
..., an application-life diagram can be constructed as shown in Fig. 6 . The service condition considered is stress, and the characteristic that is varied is the radius of the cold-formed bend. Upon examination of the relationship between the characteristic curves and the intended service life, the components having...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003528
EISBN: 978-1-62708-180-1
... and engineering components ( Ref 39 ). When a component undergoes cyclic loading, it can be susceptible to fatigue. The fatigue life for a given component is often characterized with a Wöhler diagram or S - N curve, where S is defined as the total stress range the material experiences during cyclic...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0048303
EISBN: 978-1-62708-236-5
... spheroidization of the carbides in a ferrite matrix ( Figure 1b ). Inside-diameter scale was measured as 0.34 mm (0.0134 in., or 13.4 mils). At the time of the first creep failure, the question of the remaining life of the rest of the superheater must be addressed. The log stress versus LMP curves given...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006768
EISBN: 978-1-62708-295-2
... specimens and engineering components ( Ref 49 ). When a component undergoes cyclic loading, it can be susceptible to fatigue. The fatigue life for a given component is often characterized with a Wöhler diagram or S - N curve, where S is defined as the total stress range the material experiences...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001108
EISBN: 978-1-62708-214-3
... the stress constraints of the furnace line, the curved part was a weak point where damage and final rupture concentrated. Reformer furnaces are commonly used in petrochemical plants to produce hydrogen via a high-temperature reaction between steam and hydrocarbon gases in the presence of a catalyst...