Low cycle fatigue behavior of a type 304L austenitic stainless steel in air or in vacuum, at 20 °C or at 300 °C: Relative effect of strain rate and environment

Baglion, Laurent De; Méndez, J.

doi:10.1016/j.proeng.2010.03.233

Cited by 25 publications

(7 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fatigue strength under large-scale plasticity in steels used in the nuclear industry has been widely studied. Recent studies on 304L austenitic stainless steel have in particular adressed the sensitivity of its fatigue resistance to various parameters such as the environment [6], the loading type [7] or the surface finish [8][9]. For example, Poulain [8] has studied the effect of a ground surface finish and has put forward that the induced surface roughness can not only affect crack initiation, but also the first stages of propagation.…”

Section: Introductionmentioning

confidence: 99%

Low-cycle fatigue crack initiation and propagation from controlled surface imperfections in nuclear steels

Cussac

Gardin

Pélosin

et al. 2020

International Journal of Fatigue

Self Cite

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Low-cycle fatigue crack initiation and propagation from controlled surface imperfections in nuclear steels

Cussac

Gardin

Pélosin

et al. 2020

International Journal of Fatigue

Self Cite

View full text Add to dashboard Cite

“…For triangular waveshape tested specimens, the analysis of the peak stress response indicates a shift of the peak hardening towards higher number of cycles when the strain rate is reduced and more generally an increase in the cyclic stress response associated with DSA. The intrinsic effect of the strain rate on fatigue life and behavior has been previously shown by de Baglion [11] on the basis of experiments performed in vacuum on the same material. Indeed, the results obtained in air are already influenced by interactions between fatigue and environmental effects [18].…”

Section: Test Proceduresmentioning

confidence: 59%

“…The results are given in Table 1. Additional information about the cyclic stress-strain behavior and low-cycle fatigue resistance as a function of temperature and environment can be found in [11][12][13][14]. Fatigue specimens are machined with the loading axis parallel to the rolling direction of the plate.…”

Section: Materials and Specimensmentioning

confidence: 99%

Influence of Strain Rate and Waveshape on Environmentally-Assisted Cracking during Low-Cycle Fatigue of a 304L Austenitic Stainless Steel in a PWR Water Environment

Poulain

Baglion

Méndez

et al. 2019

Metals

Self Cite

View full text Add to dashboard Cite

In this paper, the low cycle fatigue resistance of a 304L austenitic stainless steel in a simulated pressurized water reactor (PWR) primary water environment has been investigated by paying a special attention to the interplay between environmentally-assisted cracking mechanisms, strain rate, and loading waveshape. More precisely, one of the prime interests of this research work is related to the consideration of complex waveshape signals that are more representative of solicitations encountered by real components. A detailed analysis of stress-strain relation, surface damage, and crack growth provides a preliminary ranking of the severity of complex, variable strain rate signals with respect to triangular, constant strain-rate signals associated with environmental effects in air or in PWR water. Furthermore, as the fatigue lives in PWR water environment are mainly controlled by crack propagation, the crack growth rates derived from striation spacing measurement and estimated from interrupted tests have been carefully examined and analyzed using the strain intensity factor range ΔKε. It is confirmed that the most severe signal with regards to fatigue life also induces the highest crack growth enhancement. Additionally two characteristic parameters, namely a threshold strain εth* and a time T*, corresponding to the duration of the effective exposure of the open cracks to PWR environment have been introduced. It is shown that the T* parameter properly accounts for the differences in environmentally-assisted growth rates as a function of waveshape.

show abstract

“…Either without or with pre-straining, the fatigue life curves (∆ 2 -N) showed classical strengthening, followed by softening leading to stabilization or to second hardening for large strain amplitudes [19,4]. The stress level was higher when the imposed strain range was large (Fig.5a, Fig.5c).…”

Section: Fatigue Testsmentioning

confidence: 96%

Fatigue life prediction for broad-band multiaxial loading with various PSD curve shapes

Niesłony

Růžička

Papuga

et al. 2012

International Journal of Fatigue

View full text Add to dashboard Cite

The main purpose of this study is to determine, via a three dimensions Finite Element analysis (FE), the stress and strain fields at the inner surface of a tubular specimen submitted to thermo-mechanical fatigue. To investigate the surface finish effect on fatigue behaviour at this inner surface, mechanical tests were carried out on real size tubular specimens under various thermal loadings. X ray measurements, Transmission Electron Microscopy observations and micro-hardness tests performed at and under the inner surface of the specimen before testing, revealed residual internal stresses and a large dislocation microstructure gradient in correlation with hardening gradients due to machining. A memory effect, bound to the pre-hardening gradient, was introduced into an elasto-visco-plastic model in order to determine the stress and strain fields at the inner surface. The temperature evolution on the inner surface of the tubular specimen was first computed via a thermo-elastic model and then used for our thermo-mechanical simulations. Identification of the thermo-mechanical model parameters was based on the experimental stabilized cyclic tension-compression tests performed at 20°C and 300°C. A good agreement was obtained between numerical stabilized tractioncompression cycle curves (with and without pre-straining) and experimental ones. This 3 dimensional simulation gave access to the evolution of the axial and tangential internal stresses and local strains during the tests. Numerical results showed: a decreasing of the tangential stress and stabilization after 40 cycles, whereas the axial stress showed weaker decreasing with the number of cycles. The results also pointed out a ratcheting and a slightly non proportional loading at the inner surface. The computed mean stress and strain values of the stabilized cycle being far from the initial ones, they could be used to get the safety margins of standard design related to fatigue, as well as to get accurate loading conditions needed for the use of more advanced fatigue analysis and criteria.

show abstract

Low cycle fatigue behavior of a type 304L austenitic stainless steel in air or in vacuum, at 20 °C or at 300 °C: Relative effect of strain rate and environment

Cited by 25 publications

References 7 publications

Low-cycle fatigue crack initiation and propagation from controlled surface imperfections in nuclear steels

Low-cycle fatigue crack initiation and propagation from controlled surface imperfections in nuclear steels

Influence of Strain Rate and Waveshape on Environmentally-Assisted Cracking during Low-Cycle Fatigue of a 304L Austenitic Stainless Steel in a PWR Water Environment

Fatigue life prediction for broad-band multiaxial loading with various PSD curve shapes

Contact Info

Product

Resources

About