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Sabine Cantournet - One of the best experts on this subject based on the ideXlab platform.
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Time-Temperature-Water content equivalence on dynamic mechanical response of polyamide 6,6
Polymer, 2018Co-Authors: Victor Fabre, Grégoire Quandalle, Noëlle Billon, Sabine CantournetAbstract:The aim of this work is to highlight an equivalence between the strain rate, the Temperature and the Water content effect on the dynamic mechanical response of polyamide 6,6. Based on WLF-like approach, the time-Temperature-Water content equivalence of store modulus and loss modulus had been demonstrated. Indeed increasing the Water content results in a steady decrease of glass transition Temperature toward a limiting value. This change in glass transition Temperature leads to an horizontal shift of master curves in accordance with the Water content level. A new shift factor can be introduced and a new relationship had been established giving the equivalent strain-rate at a Temperature reference and Water content reference. Finally, time-Temperature-Water content equivalence of mechanical behaviour of polyamide 6,6 had been validated at large strain on conditioned specimens subjected to loading-unloading tensile tests.
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Time-Temperature-Water content equivalence on dynamic mechanical response of polyamide 6,6
Polymer, 2018Co-Authors: Victor Fabre, Grégoire Quandalle, Noëlle Billon, Sabine CantournetAbstract:Abstract The aim of this work is to highlight an equivalence between the strain rate, the Temperature and the Water content effect on the dynamic mechanical response of polyamide 6,6. Based on WLF-like approach, the time-Temperature-Water content equivalence of store modulus E ' and loss modulus E ' ' had been demonstrated. Indeed increasing the Water content results in a steady decrease of glass transition Temperature toward a limiting value. This change in glass transition Temperature leads to an horizontal shift of master curves in accordance with the Water content level. A new shift factor can be introduced and a new relationship had been established giving the equivalent strain-rate at a Temperature reference and Water content reference. Finally, time-Temperature-Water content equivalence of mechanical behaviour of polyamide 6,6 had been validated at large strain on conditioned specimens subjected to loading-unloading tensile tests.
Victor Fabre - One of the best experts on this subject based on the ideXlab platform.
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Time-Temperature-Water content equivalence on dynamic mechanical response of polyamide 6,6
Polymer, 2018Co-Authors: Victor Fabre, Grégoire Quandalle, Noëlle Billon, Sabine CantournetAbstract:The aim of this work is to highlight an equivalence between the strain rate, the Temperature and the Water content effect on the dynamic mechanical response of polyamide 6,6. Based on WLF-like approach, the time-Temperature-Water content equivalence of store modulus and loss modulus had been demonstrated. Indeed increasing the Water content results in a steady decrease of glass transition Temperature toward a limiting value. This change in glass transition Temperature leads to an horizontal shift of master curves in accordance with the Water content level. A new shift factor can be introduced and a new relationship had been established giving the equivalent strain-rate at a Temperature reference and Water content reference. Finally, time-Temperature-Water content equivalence of mechanical behaviour of polyamide 6,6 had been validated at large strain on conditioned specimens subjected to loading-unloading tensile tests.
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Time-Temperature-Water content equivalence on dynamic mechanical response of polyamide 6,6
Polymer, 2018Co-Authors: Victor Fabre, Grégoire Quandalle, Noëlle Billon, Sabine CantournetAbstract:Abstract The aim of this work is to highlight an equivalence between the strain rate, the Temperature and the Water content effect on the dynamic mechanical response of polyamide 6,6. Based on WLF-like approach, the time-Temperature-Water content equivalence of store modulus E ' and loss modulus E ' ' had been demonstrated. Indeed increasing the Water content results in a steady decrease of glass transition Temperature toward a limiting value. This change in glass transition Temperature leads to an horizontal shift of master curves in accordance with the Water content level. A new shift factor can be introduced and a new relationship had been established giving the equivalent strain-rate at a Temperature reference and Water content reference. Finally, time-Temperature-Water content equivalence of mechanical behaviour of polyamide 6,6 had been validated at large strain on conditioned specimens subjected to loading-unloading tensile tests.
Noëlle Billon - One of the best experts on this subject based on the ideXlab platform.
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Time-Temperature-Water content equivalence on dynamic mechanical response of polyamide 6,6
Polymer, 2018Co-Authors: Victor Fabre, Grégoire Quandalle, Noëlle Billon, Sabine CantournetAbstract:The aim of this work is to highlight an equivalence between the strain rate, the Temperature and the Water content effect on the dynamic mechanical response of polyamide 6,6. Based on WLF-like approach, the time-Temperature-Water content equivalence of store modulus and loss modulus had been demonstrated. Indeed increasing the Water content results in a steady decrease of glass transition Temperature toward a limiting value. This change in glass transition Temperature leads to an horizontal shift of master curves in accordance with the Water content level. A new shift factor can be introduced and a new relationship had been established giving the equivalent strain-rate at a Temperature reference and Water content reference. Finally, time-Temperature-Water content equivalence of mechanical behaviour of polyamide 6,6 had been validated at large strain on conditioned specimens subjected to loading-unloading tensile tests.
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Time-Temperature-Water content equivalence on dynamic mechanical response of polyamide 6,6
Polymer, 2018Co-Authors: Victor Fabre, Grégoire Quandalle, Noëlle Billon, Sabine CantournetAbstract:Abstract The aim of this work is to highlight an equivalence between the strain rate, the Temperature and the Water content effect on the dynamic mechanical response of polyamide 6,6. Based on WLF-like approach, the time-Temperature-Water content equivalence of store modulus E ' and loss modulus E ' ' had been demonstrated. Indeed increasing the Water content results in a steady decrease of glass transition Temperature toward a limiting value. This change in glass transition Temperature leads to an horizontal shift of master curves in accordance with the Water content level. A new shift factor can be introduced and a new relationship had been established giving the equivalent strain-rate at a Temperature reference and Water content reference. Finally, time-Temperature-Water content equivalence of mechanical behaviour of polyamide 6,6 had been validated at large strain on conditioned specimens subjected to loading-unloading tensile tests.
Grégoire Quandalle - One of the best experts on this subject based on the ideXlab platform.
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Time-Temperature-Water content equivalence on dynamic mechanical response of polyamide 6,6
Polymer, 2018Co-Authors: Victor Fabre, Grégoire Quandalle, Noëlle Billon, Sabine CantournetAbstract:The aim of this work is to highlight an equivalence between the strain rate, the Temperature and the Water content effect on the dynamic mechanical response of polyamide 6,6. Based on WLF-like approach, the time-Temperature-Water content equivalence of store modulus and loss modulus had been demonstrated. Indeed increasing the Water content results in a steady decrease of glass transition Temperature toward a limiting value. This change in glass transition Temperature leads to an horizontal shift of master curves in accordance with the Water content level. A new shift factor can be introduced and a new relationship had been established giving the equivalent strain-rate at a Temperature reference and Water content reference. Finally, time-Temperature-Water content equivalence of mechanical behaviour of polyamide 6,6 had been validated at large strain on conditioned specimens subjected to loading-unloading tensile tests.
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Time-Temperature-Water content equivalence on dynamic mechanical response of polyamide 6,6
Polymer, 2018Co-Authors: Victor Fabre, Grégoire Quandalle, Noëlle Billon, Sabine CantournetAbstract:Abstract The aim of this work is to highlight an equivalence between the strain rate, the Temperature and the Water content effect on the dynamic mechanical response of polyamide 6,6. Based on WLF-like approach, the time-Temperature-Water content equivalence of store modulus E ' and loss modulus E ' ' had been demonstrated. Indeed increasing the Water content results in a steady decrease of glass transition Temperature toward a limiting value. This change in glass transition Temperature leads to an horizontal shift of master curves in accordance with the Water content level. A new shift factor can be introduced and a new relationship had been established giving the equivalent strain-rate at a Temperature reference and Water content reference. Finally, time-Temperature-Water content equivalence of mechanical behaviour of polyamide 6,6 had been validated at large strain on conditioned specimens subjected to loading-unloading tensile tests.
Yasuyuki Katada - One of the best experts on this subject based on the ideXlab platform.
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Crack initiation mechanisms for low cycle fatigue of type 316Ti stainless steel in high Temperature Water
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2008Co-Authors: En-hou Han, Yasuyuki KatadaAbstract:Abstract Low cycle fatigue (LCF) tests were performed for a type 316Ti stainless steel (SS) in high Temperature Water. Fatigue crack initiation behaviors in high Temperature Water were investigated. It was found that there existed several kinds of Ti-bearing precipitates, consisting of isolated TiN or duplex (Al, Mg)O/TiN, Mo-rich (Ti, Mo)C and Ti(N,C) in the steel. Fatigue cracks were mainly initiated at Ti-bearing precipitates, phase boundaries of austenite/α-ferrite phases and persistent slip bands (PSBs) in austenite. It is believed that synergism between the mechanical factors and electrochemical reactions played a key role in the process of fatigue crack initiation in high Temperature Water. Related fatigue crack initiation mechanisms for the 316Ti SS are discussed.
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Influence of surface finish on fatigue cracking behavior of reactor pressure vessel steel in high Temperature Water
Materials and Corrosion, 2006Co-Authors: H. R. Guan, En-hou Han, Yasuyuki KatadaAbstract:The low cycle fatigue behavior of a low-alloy reactor pressure vessel (RPV) steel was investigated in high Temperature Water. Main attention was paid to the effects of surface finish of specimens on fatigue cracking behavior. It was found that the influence of surface finish on fatigue resistance of the steel was strain-rate dependent in high Temperature Water. Pretty obvious degradation of fatigue resistance appeared at fast strain rate with rougher surface finish. At slow strain rate, surface circumferential scratches promoted crack initiation and propagation. The fracture surface showed relatively flat and slight crack-arrest features. At fast strain rate, surface scratches also promoted crack initiation, but seemed not to dominate crack propagation. The fracture surface showed typical terraced and fan-like features. The above fatigue cracking behavior can be rationalized by a strain-rate dependent environmentally assisted cracking process of low-alloy RPV steel in high Temperature Water.
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Inclusion‐involved fatigue cracking in high Temperature Water
Materials and Corrosion, 2005Co-Authors: Yasuyuki KatadaAbstract:The nonmetallic inclusions in low-alloy pressure vessel steel A533B were carefully examined and the low cycle fatigue (LCF) behavior of the steel was investigated in 288 °C air and Water. Much attention was paid to the roles of inclusions on fatigue crack initiation and propagation in high Temperature Water. Three types of inclusions were observed in the steel, consisting of isolated or clustered sulfide inclusions, duplex oxide-sulfide inclusions and isolated oxide inclusions. In high Temperature air, fatigue cracks initiated predominantly from subsurface inclusions. In high Temperature Water, however, fatigue cracks initiated primarily at corrosion pits on the specimen surfaces resulted mainly from the dissolution of large or clustered sulfide inclusions. The subsurface and bulk inclusions also contributed to the fatigue cracking in high Temperature Water. Possible influence of the above three types of inclusions on environmentally assisted cracking (EAC) was evaluated. The fatigue fractographic features suggested a synergism between sulfide inclusions and hydrogen-induced cracking dominate the present EAC in high Temperature Water.
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Strain-amplitude dependent fatigue resistance of low-alloy pressure vessel steels in high-Temperature Water
Journal of Materials Science, 2005Co-Authors: Yasuyuki KatadaAbstract:Low cycle fatigue resistance of low-alloy pressure vessel steels was investigated in 561 K air and Water over a wide strain amplitude range. It was found that fatigue resistance of the steels was enhanced in high-Temperature Water relative to high-Temperature air under the low strain amplitude conditions ( 2 × 104 cycles), while it was remarkably degraded in high-Temperature Water under the higher strain amplitude conditions. Fatigue cracking and fractographic features suggested that effects of hydrogen be involved in the present corrosion fatigue process in high-Temperature Water. Possible environmentally assisted cracking mechanisms are discussed.
