Abstract
The present study deals with crack initiation and crack growth, not only under creep and creep-fatigue conditions but also under more complex thermomechanical cyclic loadings, in both 316L and 1Cr-1Mo-0.25V steel.In these creep ductile materials, most studies have focused on the creep crack growth rates, da/dtand load-geometry parameter C*correlations. In this paper, the creep crack initiation time is defined as the time T{sub i} necessary for a defect to grow by a small critical distance X{sub c} (X{sub c}{approx}50{mu}m for example). This initiation stage may represent a large part of the rupture life of a cracked component. The importance of such studies is discussed in the first part.In the second part, an attempt is made to present a simplified method based on the fracture mechanics of creeping solids to define the relevant load-geometry parameters for crack initiation and crack growth under creep-fatigue loadings. In particular, it is shown that da/dN-{Delta}Kcorrelations apply only when the hold time t{sub h} is smaller than the transition time t{sub tr} between small-scale and large-scale viscoplasticity. Conversely, for long hold times, it is suggested that the T{sub i}-C*correlation be used to predict the fatigue. ((orig.)).
Piques, R;
[1]
Molinie, E;
[1]
Pineau, A
[1]
- Ecole Nationale Superieure des Mines, 91 - Evry (France). Centre des Materiaux
Citation Formats
Piques, R, Molinie, E, and Pineau, A.
Creep and creep-fatigue cracking behaviour of two structural steels.
Netherlands: N. p.,
1995.
Web.
doi:10.1016/0029-5493(94)00830-R.
Piques, R, Molinie, E, & Pineau, A.
Creep and creep-fatigue cracking behaviour of two structural steels.
Netherlands.
https://doi.org/10.1016/0029-5493(94)00830-R
Piques, R, Molinie, E, and Pineau, A.
1995.
"Creep and creep-fatigue cracking behaviour of two structural steels."
Netherlands.
https://doi.org/10.1016/0029-5493(94)00830-R.
@misc{etde_101534,
title = {Creep and creep-fatigue cracking behaviour of two structural steels}
author = {Piques, R, Molinie, E, and Pineau, A}
abstractNote = {The present study deals with crack initiation and crack growth, not only under creep and creep-fatigue conditions but also under more complex thermomechanical cyclic loadings, in both 316L and 1Cr-1Mo-0.25V steel.In these creep ductile materials, most studies have focused on the creep crack growth rates, da/dtand load-geometry parameter C*correlations. In this paper, the creep crack initiation time is defined as the time T{sub i} necessary for a defect to grow by a small critical distance X{sub c} (X{sub c}{approx}50{mu}m for example). This initiation stage may represent a large part of the rupture life of a cracked component. The importance of such studies is discussed in the first part.In the second part, an attempt is made to present a simplified method based on the fracture mechanics of creeping solids to define the relevant load-geometry parameters for crack initiation and crack growth under creep-fatigue loadings. In particular, it is shown that da/dN-{Delta}Kcorrelations apply only when the hold time t{sub h} is smaller than the transition time t{sub tr} between small-scale and large-scale viscoplasticity. Conversely, for long hold times, it is suggested that the T{sub i}-C*correlation be used to predict the fatigue. ((orig.)).}
doi = {10.1016/0029-5493(94)00830-R}
journal = []
issue = {2-3}
volume = {153}
journal type = {AC}
place = {Netherlands}
year = {1995}
month = {Jan}
}
title = {Creep and creep-fatigue cracking behaviour of two structural steels}
author = {Piques, R, Molinie, E, and Pineau, A}
abstractNote = {The present study deals with crack initiation and crack growth, not only under creep and creep-fatigue conditions but also under more complex thermomechanical cyclic loadings, in both 316L and 1Cr-1Mo-0.25V steel.In these creep ductile materials, most studies have focused on the creep crack growth rates, da/dtand load-geometry parameter C*correlations. In this paper, the creep crack initiation time is defined as the time T{sub i} necessary for a defect to grow by a small critical distance X{sub c} (X{sub c}{approx}50{mu}m for example). This initiation stage may represent a large part of the rupture life of a cracked component. The importance of such studies is discussed in the first part.In the second part, an attempt is made to present a simplified method based on the fracture mechanics of creeping solids to define the relevant load-geometry parameters for crack initiation and crack growth under creep-fatigue loadings. In particular, it is shown that da/dN-{Delta}Kcorrelations apply only when the hold time t{sub h} is smaller than the transition time t{sub tr} between small-scale and large-scale viscoplasticity. Conversely, for long hold times, it is suggested that the T{sub i}-C*correlation be used to predict the fatigue. ((orig.)).}
doi = {10.1016/0029-5493(94)00830-R}
journal = []
issue = {2-3}
volume = {153}
journal type = {AC}
place = {Netherlands}
year = {1995}
month = {Jan}
}