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cycles-to-failure tests

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870045
EISBN: 978-1-62708-344-7
...Abstract Abstract This chapter familiarizes readers with the methods used to quantify the effects of fatigue on component lifetime and failure. It discusses the development and use of S-N (stress amplitude vs. cycles to failure) curves, the emergence of strain-based approaches to fatigue...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270191
EISBN: 978-1-62708-301-0
...Abstract Abstract This report describes the failure of a gas turbine in a combined-cycle power plant and the examination and tests that were conducted to determine the cause. Based on microstructural analysis, hardness measurements, and tensile tests, the failure was attributed to inadequate...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270102
EISBN: 978-1-62708-301-0
.... dowel bolts fatigue failure fractography low-cycle fatigue test metallography scanning electron microscopy Summary Background Pertinent Specifications and Manufacturing Details Testing Procedure and Results The spur and bevel gears of an aircraft engine were fastened by a set...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870099
EISBN: 978-1-62708-299-0
... cycles to failure tests are usually plotted as maximum stress, minimum stress, or stress amplitude versus number of cycles, N , to failure, using a logarithmic scale for the number of cycles. Stress is plotted on either a liner or a logarithmic scale. The resulting plot of the data is termed an S-N...
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
... increases the dislocation density, increasing the amount of elastic strain and stress on the material. Low-cycle fatigue test data are often presented as a plot of the plastic strain range, Δε p , versus cycles to failure, N . When plotted on log-log coordinates, a straight line is obtained...
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
... Histograms showing fatigue-life distribution for 57 specimens of a 75S-T6 aluminum alloy tested at 207 MPa (30 ksi). Note the influence of a (a) linear or (b) logarithmic plot of cycles to failure N on the shape of the histogram. Source: Ref 9 Fig. 14 Schematic showing the fatigue curve...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060043
EISBN: 978-1-62708-343-0
... in these chapters include: Development of simplified engineering deformation interaction models for each type of SRP cycle Examples of the cyclic deformation and failure modes for a variety of metals and alloys Procedures for conducting tests for the four SRP strain ranges Development...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250311
EISBN: 978-1-62708-345-4
... modes may have to be terminated because of failure by another mode. For example, bending fatigue tests conducted at a comparatively low load, targeting failure in several million cycles, may have to be terminated due to pitting failure. Consequently, PC gear testing is more expensive than the tests...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060111
EISBN: 978-1-62708-343-0
...-of-phase, PC + PP, fast-slow strain cycle. Source: Ref 6.26 Fig. 6.40 Variation of tensile ductility (elongation) with test temperature for B-1900+Hf. TMF, thermomechanical fatigue. Source: Ref 6.26 Fig. 6.42 Inelastic Strain-Range Life Relationships for out-of-phase bithermal...
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
... , MPC-3, Metal Properties Council , New York , 1976 , p 283 98. Ostergren W.J. , A Damage Function and Associated Failure Equations for Predicting Hold Time and Frequency Effects in Elevated Temperature Low Cycle Fatigue , ASTM J. Test. Eval. , Vol 4 ( No. 5 ), 1976 , p 327 - 339...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870123
EISBN: 978-1-62708-344-7
... translation of German text, NASA TT 1-13460 , 1971 . 6.3 Langer B.F. , Fatigue Failure from Stress Cycles of Varying Amplitude , J. Appl. Mech. , Vol 59 , 1937 , p A160 – A162 10.1115/1.4008807 6.4 Miner M.A. , Cumulative Damage in Fatigue , J. Appl. Mech. , Vol 67 , 1945...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780238
EISBN: 978-1-62708-281-5
... The traditional total-life philosophy for fatigue life prediction is based on an endurance limit established from stress-log cycle plots, also known as S - N curves. In these tests, uncracked specimens are subjected to a constant amplitude load cycle until failure occurs. Often, fatigue tests are performed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490415
EISBN: 978-1-62708-340-9
... a rejuvenation heat treatment. Fig. 9.47. Scatterband for low-cycle-fatigue properties at 850 °C (1560 °F) for IN 738 LC tested at two different frequencies ( Ref 75 ). Fig. 9.51. Comparison of stress-rupture life at 345 MPa and 735 °C (50 ksi and 1355 °F) in service-exposed Inconel X-750...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540121
EISBN: 978-1-62708-309-6
... history usually includes cyclic loads. Further, in conducting failure analysis, if we machine a test coupon from a location that has been subjected to plastic deformation, the stress-strain properties will possibly differ from those had the material not been so strained. Remember that the Bauschinger...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490265
EISBN: 978-1-62708-340-9
... Fatigue and creep ① Calculation Replacement (destructive test for sampled bolts) Nondestructive test When crack initiation is anticipated Failures in steam-turbine rotors (based on <xref ref-type="bibr" rid="t60490265-ref7">Ref 7</xref>) Table 6.2. Failures in steam-turbine rotors...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870325
EISBN: 978-1-62708-344-7
... ( Ref 12.3 ) Fig. 12.46 Total lifetime hysteresis energy dissipation as function of cycles to failure for tensile, compressive, and fully reversed fatigue loading for a typical metal compared with the general behavior of bone Fig. 12.49 Reversed bending cyclic crack initiation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060083
EISBN: 978-1-62708-343-0
... a specimen , that is, subjecting a specimen, usually uniaxial, to the same loading history as determined from prior analysis. Sometimes, such tests are taken to failure to gain experimental data in order to check life prediction models. However, for present purposes, it is only necessary to continue cycling...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610415
EISBN: 978-1-62708-303-4
... crack growth rate for 2.25Cr-1Mo steel tested in air. R = 0.05; cyclic frequency of 400/min. Source: Ref 18 Fig. 4 Variation of minimum creep rate with stress for a normalized and tempered 1.25Cr-0.50Mo steel. T and I denote transgranular and intergranular failure, respectively. Source...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780249
EISBN: 978-1-62708-281-5
... cycles-to-failure curves for several polymers tested at a frequency of 30 Hz. PS, polystyrene; EP, epoxy; PET, polyethylene terephthalate; PMMA, polymethyl methacrylate; PPO, polyphenylene oxide; PE, polyethylene; PP, polypropylene; PTFE, polytetrafluoroethylene. Source: Ref 5 Experiments...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870237
EISBN: 978-1-62708-344-7
... that the latter is the case, but in any event, it is clear that the surface roughening was a precursor to the fatigue. Another interesting experiment associating surface with fatigue was described by Raymond and Coffin ( Ref 10.23 ). In their tests they cycled a specimen to greater than half of its life...