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laboratory fatigue testing

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Published: 30 November 2013
Fig. 18 Typical fatigue ( S-N ) diagram of laboratory fatigue testing of medium-strength ferrous metal. More
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
... of the problems of laboratory fatigue testing and of the fatigue process itself. Finally, information on types and statistical aspects of fatigue is provided along with examples. fatigue fracture laboratory fatigue testing macroscopic characteristics microscopic characteristics strength stress...
Image
Published: 30 November 2013
Fig. 19 Subsurface-origin fatigue fracture in an induction-hardened 3¼ in.-diam 1541 steel axle that was continuously tested in rotating bending fatigue in the laboratory. The primary fatigue fracture originated at A, while a smaller crack was progressing at B. Note that no beach marks More
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 the S-N Curve Most laboratory fatigue testing is done either with axial loading or in bending, thus producing only tensile and compressive stresses. The stress usually is cycled either between a maximum and a minimum tensile stress or between a maximum tensile stress and a maximum compressive...
Image
Published: 01 December 2003
Fig. 26 SEM view of fatigue striations in medium-density polyethylene, laboratory tested at 0.5 Hz with maximum stress 30% of the yield strength. Crack growth is upward in this view. Original magnification 200×. Source: Ref 23 More
Image
Published: 30 November 2013
Fig. 32 Bending fatigue fracture through the cheek of a diesel engine crankshaft. The very prominent steps and beach marks were the result of severe overloading during starting and clutching with a very aggressive friction material in the clutch. Though this was a laboratory test More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770001
EISBN: 978-1-62708-337-9
..., the carburized case depth, and the target values of surface carbon adopted by a manufacturer/heat treater are based on experience, design procedures, and guidelines provided in national or international standards, and perhaps on adjustments indicated by laboratory test results. It is difficult to determine...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870085
EISBN: 978-1-62708-299-0
... impingement erosion along with testing and prevention methods. It also provides information on fretting corrosion and fretting fatigue. aluminum aluminum alloys cavitation corrosion cavitation erosion testing fretting corrosion liquid impingement erosion CORROSION can combine with mechanical...
Image
Published: 01 November 2012
h and was then returned to the laboratory, where it was flexed in high-stress, low-cycle fatigue, fracturing at 60,000 cycles. Note that the fatigue crack zone at upper left has a very fine texture, the result of continual testing. Note also the radial, fanlike ridges emanating from the fracture More
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
... limit. Such a limit may be exhibited in pristine, carefully controlled, constant-amplitude, laboratory fatigue tests of highly polished coupons, but this response cannot be expected in service. Most other metals and alloys do not exhibit an endurance limit under any circumstance. Fig. 3.13...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2022
DOI: 10.31399/asm.tb.tstap.t56040076
EISBN: 978-1-62708-428-4
... with an associated hardness range. Molybdenum is susceptible to smearing. Furthermore, damage to hard/brittle phases may also occur during improper sample preparation. Round Robin Testing Round robin testing was performed on this coating by the member laboratories of the TSS Accepted Practices Committee...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490415
EISBN: 978-1-62708-340-9
... cycles in machines involve independent variations of strain and temperature, unlike in the isothermal low-cycle-fatigue tests conducted in the laboratory. In view of the ease of testing and data analysis, however, most laboratory studies have focused on isothermal fatigue tests, assuming that such tests...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870099
EISBN: 978-1-62708-299-0
... on both magnitude and duration of tensile strength acting at the surface. The effects of the factors have been established most commonly by means of accelerated laboratory tests; results of one set of such tests are reflected in the shaded and cross-hatched bands in Fig. 4 . Despite introduction...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1983
DOI: 10.31399/asm.tb.mlt.t62860269
EISBN: 978-1-62708-348-5
... ASTM E 399 compact specimen for fracture toughness testing. The specimens are precracked by fatigue cycling to an initial relative crack length of a / W ≃ 0.5. Precracking loads are limited to low values to keep the plastic zone size at the crack tip small; the fatigue loads must...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270182
EISBN: 978-1-62708-301-0
...Abstract Abstract A turbine in a fertilizer plant began to vibrate and was shut down to investigate the problem. A first stage rotor blade was found fractured and was removed along with several other blades for further examination. Based on their observations and testing, investigators...
Image
Published: 01 December 2004
microstructures. Curves are results from one laboratory. Property values are averages from seven labs as part of a round-robin test program. Young’s modulus, GPa (psi × 10 6 ), X, 70 (10.1), Y, 70 (10.1), Z, 71 (10.3); yield strength 0.2% offset, MPa (ksi), X, 229 (33.3), Y, 224 (32.5), Z, 217 (31.5); ultimate More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180151
EISBN: 978-1-62708-256-3
... at or near ambient temperature, while subsequent laboratory tests of Charpy or Izod specimens show a transition temperature well below −18 °C (0 °F). The effects of size in fatigue, stress-corrosion, and hydrogen embrittlement testing are not well understood. However, on the basis of the limited evidence...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060043
EISBN: 978-1-62708-343-0
.... Instead, SRP life-prediction modeling is based directly on creep-fatigue results from laboratory tests. It should be understood, however, that other damaging mechanisms (oxidation, corrosion, solid-state transformations, etc.) are also present during high-temperature testing and exert an influence...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540121
EISBN: 978-1-62708-309-6
... lives. Laboratory fatigue test specimens usually are very small, and complete failure (fracture) of a specimen generally occurs shortly after the crack has initiated. Therefore, the two stages of failure (initiation and propagation) are not distinguished. Conventional fatigue data that represent...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870001
EISBN: 978-1-62708-344-7
... Laboratories in conjunction with the National Bureau of Standards (now NIST) ( Ref 1.4 ). A summary of their results is shown in Table 1.2 . Although several types of failures were considered—not only fatigue—many other failure mechanisms were involved. Summary of a Battelle/National Bureau of Standards...