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TECHNICAL PAPERS

Thermomechanical Behavior and Modeling Between 350°C and 400°C of Zircaloy-4 Cladding Tubes From an Unirradiated State to High Fluence (0 to 85⋅1024 nm−2,E>1 MeV)

[+] Author and Article Information
I. Schäffler, P. Geyer, P. Bouffioux

Electricité de France, Direction des Etudes et Recherches, Département MTC Route de Sens, 77250 Moret/Loing, France

P. Delobelle

Laboratoire de Mécanique Appliquée R. Chaléat, UMR 6604, 24 chemin de l’Epitaphe, 25030 Besançon Cedex, France

J. Eng. Mater. Technol 122(2), 168-176 (Jul 06, 1999) (9 pages) doi:10.1115/1.482783 History: Received November 12, 1998; Revised July 06, 1999
Copyright © 2000 by ASME
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References

Figures

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Longitudinal tensile tests performed at 350°C for different strain rates ε̇zzT=2⋅10−3,2⋅10−4,2⋅10−5 and 2⋅10−6 s−1. Experimental results and simulations.
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Longitudinal creep tests performed at 350°C for different stress levels: σzz=275, 350, 380, and 400 MPa. Experimental results and simulations.
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Biaxial tensile tests performed at 350°C for different stress-biaxiality ratio α=σθθzz,α=−0.25, −0.5, 0, 0.25, 0.5, and 0.75. Experimental results and simulations.
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Biaxial creep tests performed at 350°C with α=0.5 and for different stress levels: σθθ=100, 140, 170, 200, and 275 MPa. Experimental results and simulations.
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Biaxial tensile tests performed at 350, 380, and 400°C with α=0.5 and ε̇θθ=2⋅10−5 s−1 followed by a relaxation phase. These loadings are representative of a PCI transient. Experimental results and simulations.
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Biaxial tensile tests performed at 350°C with α=0.5 for an imposed hoop strain rate of 2⋅10−4 s−1 and for different fluences: ϕ=0,5.1⋅1024,7.21⋅1024, and 19⋅1024 nm−2(E>1 MeV). Experimental results and simulations (program A).
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Biaxial creep tests performed at 350°C with α=0.5 on irradiated cladding tubes (1000 h of irradiation) for different stress levels: σθθ=359, 397, 445, and 517 MPa. Experimental results and simulations (program A).
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Biaxial tensile tests performed at 350°C with α=0.5 on irradiated cladding tubes until two cycles in PWR (ϕ=45⋅1024 nm−2,(E>1 MeV)) and for different hoop strain rates: ε̇θθ=2⋅10−4,3⋅10−4, and 5⋅10−6 s−1. Experimental results and simulations (Program B).
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Biaxial tensile tests performed at 380°C with α=0.5 on irradiated cladding tubes until four cycles in PWR (ϕ=85⋅1024 nm−2,(E>1 MeV)) and for different hoop strain rates: ε̇θθ=1.4⋅10−6,1.4⋅10−7 and 1.4⋅10−8 s−1. Experimental results and simulations (program C).
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Biaxial creep tests performed at 350°C with α=0.5 and σθθ=415 MPa on irradiated cladding tubes at different fluences: ϕ=4.4⋅1024,20.8⋅1024,45⋅1024, and 85⋅1024 nm−2(E>1 MeV), programs A,B, and C. Experimental results and simulations.
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Evolution at 350°C of the flow stress for different total strain levels versus the fluence (a) ε̇θθ=2⋅10−4 s−1, (b) ε̇θθ=5⋅10−6 s−1
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Representation of the equivalent Mises steady creep rates versus the equivalent Mises stress at 350°C and for different fluence levels, 0≤ϕ≤85⋅1024 nm−2
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Evolution of the equivalent steady creep rates versus the fluence (programs A,B, and C) at 350°C and for different stress levels; σθθ=313, 334, 368, and 415 MPa
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Biaxial tensile tests performed at 350 and 380°C with α=0.5,ε̇θθ=2⋅10−5 s−1, followed by a relaxation period on irradiated cladding tubes until four cycles in PWR (ϕ=85⋅1024 nm−2,(E>1 MeV)). These loadings are representative of a PCI transient on irradiated tubes. Experimental results and simulations.

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