Fatigue crack growth in a type 316 stainless steel and a 20 pet Cr/25 pet Ni/Nb stainless steel at elevated temperature

Wareing, J.

doi:10.1007/bf02641930

Cited by 46 publications

(14 citation statements)

References 9 publications

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“…This has been verified in 3 Cr-Mo-V steel at 550°C where the exponent of a in vacuum was 2.3 compared with unity in air [S]. Figure 4 is a logarithmic plot of plastic strain range against total strain range for several alloys [3,22,[27][28][29][30] and shows that in the region cp < 0405, a value of y = 0.45 (see equation (2) and Fig. 2) may be used.…”

Section: Application To High Strain Fatiguementioning

confidence: 66%

“…2) may be used. Table 1 presents values of p, the cyclic strain hardening exponent, equation ( l ) , and endurance parameters M and k which have previously been reported [3,22,26,28,301. Initiation data are very rarely quoted but we may use the fact that N i tends to Nf at low strain ranges [13,22].…”

Section: Application To High Strain Fatiguementioning

confidence: 99%

“…The eighth column of Table 1 summarizes crack growth relations which have been observed in push-pull high strain fatigue [3,5,291. These may be written da/dN = const.…”

Section: Comparison With Experimentsmentioning

confidence: 99%

“…plots of either plastic or total strain range against cycles to failure) can be extrapolated to predict lifetime at lower strain ranges experienced in service. This procedure has been supplemented by cyclic crack growth rates measured during high strain fatigue [1][2][3][4][5][6]: one may integrate the growth relation from an early crack length a, to a final length a, and hence obtain the fatigue life. Sometimes it may be required to estimate likely crack growth rates occurring in service when only plain specimen total endurances, N,, are available.…”

Section: Introductionmentioning

confidence: 99%

“…It is a feature of high strain fatigue that cyclic crack growth rates are accelerated not only with increasing plastic strain range, cpr but also with increased crack length, a [3,7] :…”

Section: Introductionmentioning

confidence: 99%

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The Prediction of Crack Growth Rates From Total Endurances in High Strain Fatigue

Skelton

1979

Fat Frac Eng Mat Struct

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Abstract-A method of calculating crack growth rates in high strain fatigue from total endurance data is presented. Endurances are known to be affected by dwell periods and environment and the expression derived takes these into account. The basic argument is that crack propagation may be regarded as increments of successive reinitiation and so the deeper a crack grows, with an accompanying increase in strain concentration at the tip, the fewer fatigue cycles are required for the next step. Previously derived expressions for strain concentration are employed which require a knowledge of the cyclic strain hardening properties of the material. These are produced in detail for a cast 4 Cr-Mo-V steel at 550°C.Two constants in the resulting propagation expression are semi-empirical, but if the surface (plastic or total) strain range is known then cyclic crack growth rates may be calculated for any crack depth. It is also shown that in the limiting case of zero surface plastic strain, the expression reduces to that observed for crack growth under linear elastic conditions.

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Section: Application To High Strain Fatiguementioning

confidence: 66%

Section: Application To High Strain Fatiguementioning

confidence: 99%

“…The eighth column of Table 1 summarizes crack growth relations which have been observed in push-pull high strain fatigue [3,5,291. These may be written da/dN = const.…”

Section: Comparison With Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…It is a feature of high strain fatigue that cyclic crack growth rates are accelerated not only with increasing plastic strain range, cpr but also with increased crack length, a [3,7] :…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations