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finite-endurance range

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Published: 01 January 1996
Fig. 9 Evaluation of the range of finite endurance in Fig. 8 and conjunction with the range of transition in Fig. 5(b) to the type I fatigue diagram More
Image
Published: 01 January 1996
Fig. 10 Comparison of results in the range of the finite endurance. The position of the thick lines is constant in the three subfigures. (a) Condition B is better than condition A. (b) The thick lines represent 50% of probability. Condition A becomes better because the range of condition B 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
... a possible mean load that leads to the fracture of a single part or specimen. The article discusses the evaluation of the range of transition and of the finite-endurance range for fatigue curves. It concludes with a discussion on extrapolation from the range of finite endurance into the range of transition...
Image
Published: 01 January 1996
Fig. 8 Evaluation of the levels of alternating load 220, 250, and 295 MPa in the range of the finite endurance. The level 200 MPa belongs as well to the range of the finite endurance as to the range of the transition. It was evaluated preferably for determination of N 50 and estimation More
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002469
EISBN: 978-1-62708-194-8
... in load control. They blend smoothly with the strain-controlled tests, and a fatigue curve ranging from 10 2 cycles to the endurance limit is obtained. (Clip-on extensometers for high strain ranges do not have the resolution to accurately measure and control small strain ranges. They also limit...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006344
EISBN: 978-1-62708-179-5
... Abstract A wide range of mechanical properties can be obtained with a given composition of cast iron, depending on the microstructural constituents that form during solidification and subsequent solid-state processing. This article discusses the mechanical properties of gray iron and provides...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003313
EISBN: 978-1-62708-176-4
...-life, finite-life Strain-life ε- N Damage tolerant Fracture mechanics da / dN -Δ K The S - N and ε- N techniques are usually appropriate for situations where a component or structure can be considered a continuum (i.e., those meeting the “no cracks” assumption). In the event...
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
... equations or computational mechanics (finite-element analysis). One needs to know the geometries and the materials as well as the processing history and mechanical properties of the materials. Thus far, this article has briefly discussed the mechanics, the structures, and, to a lesser extent...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003257
EISBN: 978-1-62708-176-4
... knowledge to develop a predictive model of the product. The model may be a prototype, a simplified mathematical model, or a complex finite element model. Regardless of the level of sophistication of the model, reaching the product design objectives of material and geometry specifications for successful...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002400
EISBN: 978-1-62708-193-1
... the microstructures and bending fatigue performance of carburized steels. The Carburizing Process and Microstructure Bending fatigue performance of carburized steels can vary significantly. One study reported values of experimentally measured endurance limits ranging from 200 to 1930 MPa (29 to 280 ksi...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002371
EISBN: 978-1-62708-193-1
.... The residual stress effect is most pronounced in the endurance limit regime (10 7 cycles), although significant effects of residual stress can be seen in the higher stress ranges (low-cycle fatigue region), which yield lives of 10 3 to 10 5 cycles. The effect of residual surface stress on fatigue tends...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002369
EISBN: 978-1-62708-193-1
... of endurance limit in steels. The statistical problem is then reduced to simply comparing a single load level with a single strength number, the endurance limit. Figure 1 schematically illustrates the problem of determining the acceptable distance between the average loading and the average endurance limit...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002396
EISBN: 978-1-62708-193-1
.... The traditional approach to fatigue design with ferrous alloys, based on endurance limits and infinite life criterion, has been supplanted by approaches based on finite-life behavior that emphasize the cyclic deformation aspects of the fatigue process ( Ref 4 , 5 ). Central to these approaches for predicting...
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
..., although this ratio can range from 0.35 to 0.6. Steels with an ultimate strength over 1380 MPa (200 ksi) often have carbide inclusions formed during the tempering of martensite. These nonmetallic inclusions can serve as crack-initiation points, which effectively reduce the endurance limit ( Ref 6...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002350
EISBN: 978-1-62708-193-1
... as a controlling quantity is a natural progression of technology. Finite-Life Criterion (ε-<italic>N</italic> Curves) With more advanced and highly loaded components, it became obvious that stress-based techniques alone would not be sufficient to handle the full range of problems that needed to be addressed...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002399
EISBN: 978-1-62708-193-1
... in terms of fatigue endurance limits ( Fig. 1 ), although testing in the finite life range (below 10 6 cycles) is also being emphasized more ( Fig. 2 , 3 ). The fatigue endurance limit (or the “knee” in the fatigue curve) usually occurs between 10 6 and 10 7 cycles. For many tests, if a specimen...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003315
EISBN: 978-1-62708-176-4
... stressing of material at frequencies typically in the range of 15 to 25 kHz. The major advantage of using ultrasonic fatigue is its ability to provide fatigue-limit and near-threshold data within a reasonable length of time. High-frequency testing provides rapid evaluation of the high-cycle fatigue limit...
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006549
EISBN: 978-1-62708-210-5
... at the notch root and in the smooth test specimen when both are subjected to identical stress-strain histories. When the part is loaded beyond the elastic limit and significant plastic strains are produced, the fatigue life is reduced (to a finite number of cycles) and the mode of failure is described as low...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005533
EISBN: 978-1-62708-197-9
.... The article explains the finite-difference method, finite-element method, mutual impedance method, and boundary-element method for the numerical computation of the induction heat treating processes. It also discusses the direct and indirect coupling approaches for coupling the electromagnetic and heat...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003668
EISBN: 978-1-62708-182-5
... to dominate thick- section component endurance ( Ref 20 ). The usual approach to corrosion-fatigue testing is to perform a state-of-the-art fatigue test in the presence of the environment of interest. This article emphasizes important factors that should be recognized and controlled in corrosion-fatigue...