scholarly journals Crack growth rates and fracture toughness of irradiated austenitic stainless steels in BWR environments.

2008 ◽  
Author(s):  
O. K. Chopra ◽  
W. J. Shack
Keyword(s):  
Fracture Toughness ◽  
Crack Growth ◽  
Stainless Steels ◽  
Growth Rates ◽  
Austenitic Stainless Steels ◽  
Crack Growth Rates

Bayesian nonparametric analysis of crack growth rates in irradiated austenitic stainless steels in simulated BWR environments

2016 ◽  
Vol 307 ◽  
pp. 411-417
Author(s):  
Yasuhiro Chimi ◽  
Hisashi Takamizawa ◽  
Shigeki Kasahara ◽  
Keiko Iwata ◽  
Yutaka Nishiyama
Keyword(s):  
Crack Growth ◽  
Stainless Steels ◽  
Growth Rates ◽  
Austenitic Stainless Steels ◽  
Nonparametric Analysis ◽  
Bayesian Nonparametric ◽  
Crack Growth Rates

Crack Growth Rates of Irradiated Austenitic Stainless Steels in BWR Environments at 289°C

2007 ◽  
Author(s):  
O. K. Chopra ◽  
E. E. Gruber ◽  
B. Alexandreanu ◽  
Y. Chen ◽  
W. J. Shack
Keyword(s):  
Growth Rate ◽  
Crack Growth ◽  
Stainless Steels ◽  
Growth Rates ◽  
Austenitic Stainless Steels ◽  
Compact Tension ◽  
Constant Load ◽  
Specimen Size ◽  
Crack Growth Rates ◽  
Sawtooth Waveform

Crack growth rate (CGR) data have been obtained in boiling water reactor environments on several grades of austenitic stainless steels, including weld heat-affected-zone and cast materials, that were irradiated up to 2.0 × 1021 n/cm2 (E > 1 MeV) (≈3 dpa). Crack growth tests were conducted on 1/4-T compact tension specimens subjected to either a sawtooth waveform with load ratios up to 0.7 and rise times up to 1000 s, or a constant load with or without periodic partial unloading. The results indicate significant enhancement of crack growth rates in the irradiated steels. The results are compared with data obtained from other studies. The existing CGR data are also reviewed to evaluate the effects of material composition, irradiation, and water chemistry on the CGRs in austenitic SSs. The significance of specimen size criteria is discussed.

scholarly journals Advantageous Description of Short Fatigue Crack Growth Rates in Austenitic Stainless Steels with Distinct Properties

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 475
Author(s):  
Lukáš Trávníček ◽  
Ivo Kuběna ◽  
Veronika Mazánová ◽  
Tomáš Vojtek ◽  
Jaroslav Polák ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Stainless Steels ◽  
Growth Rates ◽  
Large Scale ◽  
J Integral ◽  
Scale Yielding ◽  
Residual Fatigue ◽  
Crack Growth Rates

In this work two approaches to the description of short fatigue crack growth rate under large-scale yielding condition were comprehensively tested: (i) plastic component of the J-integral and (ii) Polák model of crack propagation. The ability to predict residual fatigue life of bodies with short initial cracks was studied for stainless steels Sanicro 25 and 304L. Despite their coarse microstructure and very different cyclic stress–strain response, the employed continuum mechanics models were found to give satisfactory results. Finite element modeling was used to determine the J-integrals and to simulate the evolution of crack front shapes, which corresponded to the real cracks observed on the fracture surfaces of the specimens. Residual fatigue lives estimated by these models were in good agreement with the number of cycles to failure of individual test specimens strained at various total strain amplitudes. Moreover, the crack growth rates of both investigated materials fell onto the same curve that was previously obtained for other steels with different properties. Such a “master curve” was achieved using the plastic part of J-integral and it has the potential of being an advantageous tool to model the fatigue crack propagation under large-scale yielding regime without a need of any additional experimental data.

Fatigue crack growth rates and fracture toughness in electroslag refined En 52 steel

1980 ◽  
Vol 2 (4) ◽  
pp. 147-152 ◽  
Author(s):  
M HEBSUR ◽  
K ABRAHAM ◽  
Y PRASAD
Keyword(s):  
Fracture Toughness ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Growth Rates ◽  
Crack Growth Rates
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