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fatigue scatter

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Published: 01 January 1996
Fig. 1 Scatter in the fatigue life for shot-peened carbon steel spring wire (ASTM A 227, Class II steel). It is not uncommon for some springs to survive 10 million cycles when other springs from the same batch, tested at the same time, have failed at 400,000 cycles. The S - N curve shown More
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Published: 01 January 1996
Fig. 4 Typical scatter band in fatigue tests of music wire helical springs, stress range zero to maximum. Wire size 0.022–0.048 in. Source: Ref 9 More
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Published: 01 January 1996
Fig. 2 Typical true scatter in fatigue crack growth. (a) Crack growth curves. (b) Rates More
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Published: 01 January 1996
Fig. 3 Scatter due to inhomogeneities and measurement of fatigue crack growth. (a) Data. (b) Rates of crack growth. (c) Scatterband. (d) Re-prediction of crack growth curves versus cycles (N) More
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Published: 31 August 2017
Fig. 20 Brinell hardness versus fatigue limit for ductile iron shows data scatter that makes a prediction of fatigue unreliable. Source: Ref 30 More
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Published: 01 January 1996
Fig. 23 Scatter band of fatigue crack growth rates for 1 2 -hard Type 301 stainless steel, tested at 24 °C (75 °F), 10 Hz, and R ratios of 0.063 to 0.807 based on effective stress-intensity factor, K eff . Source: Ref 9 More
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Published: 01 January 1996
Fig. 17 Scatter band limits for fatigue crack growth rate behavior for a range of aluminum alloys. Source: Ref 26 More
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Published: 01 December 2008
Fig. 18 Brinell hardness versus fatigue limit for ductile iron shows data scatter that a prediction of fatigue unreliable. Source: Ref 29 More
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Published: 30 September 2015
Fig. 10 Comparison of the room-temperature fatigue life scatter bands of blended elemental (BE) and prealloyed (PA) Ti-6Al-4V compacts to that of a mill-annealed ingot metallurgy (IM) alloy. Blended elemental alloys were consolidated from chlorine-containing sponge fines blended with master More
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Published: 01 January 1990
Fig. 26 Scatter of fatigue limit data. Based on the survival after 10 million cycles of approximately 1000 specimens, at one heat, of AISI-SAE 4340 steel with tensile strengths of 995, 1320, and 1840 MPa (144, 191, and 267 ksi). Rotating-beam fatigue specimens tested at 10,000 to 11,000 rev More
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Published: 15 June 2019
Fig. 4 Scatter band limits for fatigue crack growth rate behavior for a range of aluminum alloys. Source: Ref 6 More
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002370
EISBN: 978-1-62708-193-1
... Abstract This article describes a scientific approach to the planning and evaluation of fatigue tests based on the determination of probabilities for detected fracture positions within the observed range of fatigue scatter. It schematically illustrates a constant-amplitude stress cycling about...
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Published: 01 January 1993
Fig. 22 Effect of welding process on the fatigue-crack-growth rate scattering in Ti-6Al-4V. (a) Gas-tungsten arc welding. (b) Electron-beam welding. (c) Laser-beam welding. Source: Ref 40 More
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001038
EISBN: 978-1-62708-161-0
..., ductility, cleanliness, residual stresses, surface conditions, and aggressive environments. The article discusses the stress-based and strain-based approach to fatigue. The application of fatigue data in engineering design is complicated by the characteristic scatter of fatigue data; variations in surface...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0009219
EISBN: 978-1-62708-176-4
... is discussed. The techniques for defining a mean fatigue curve and evaluating scatter or variability about that mean are explained. The article presents the standard techniques for statistical characterization of the fatigue strength or fatigue limit of a single material by use of the Probit method, the up...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003382
EISBN: 978-1-62708-195-5
... Abstract In the design of composite structures for durability and damage tolerance, the primary concerns are out-of-plane failures, such as delamination, material degradation associated with environment, stability under compression loading, large degree of scatter in fatigue life, and bearing...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002367
EISBN: 978-1-62708-193-1
... if fatigue databank information is edited to suppress the effects of other variables, such as R -ratio and material strength. ( Note: It is customary to group together fatigue data for all thicknesses, strengths, and R -ratios. This practice is inadvisable and leads to an unnecessarily large scatter...
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Published: 01 January 1987
Fig. 1249 TEM p-c replica of another area at the arrow in Fig. 1247 , showing distinct fatigue striations at center and at upper left. Elsewhere, the surface bears scattered and indistinct marks that resemble fatigue striations. 6500× More
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Published: 01 January 1987
Fig. 1029 A typical region in an area A of Fig. 1027 . Fatigue striations that are nearly vertical (arrow) are faintly visible. These were found to be parallel to the flaw (B-B in Fig. 1027 ) in both A areas in Fig. 1027 . Scattered dimples are evident in locations adjacent to the fatigue More
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Published: 30 September 2015
Fig. 11 Comparison of the fatigue strengths of fully dense extra-low chloride Ti-6Al-4V blended elemental (BE) compacts with the scatter band for the ingot metallurgy (IM) material. The BE compacts were tested in the as-hot-isostatically-pressed (HIP), broken-up structure (BUS), and thermo More