Results 261 to 270 of about 33,277 (314)

Intergranular Fracture under Creep-Fatigue Interaction

International Journal of Damage Mechanics, 1998
For metals under cyclic loading at elevated temperatures the interaction of fatigue failure with intergranular creep failure is studied by a micromechanical model. Focus here is on a range of relatively slow cycling, where creep damage dominates, or rapid cycling after that some creep damage has developed.
Helle S. Nielsen, Viggo Tvergaard
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Creep-fatigue interaction in OFHC-copper

Scripta Metallurgica, 1983
Abstract OFHC-copper which is more susceptible to interaranular cavitation than the aluminum-five percent magnesium alloy in monotonic loading is also more susceptible to intergranular fracture under fatigue loading. The difference is most remarkable for the equal-ramp cycle shape.
S. Baik, R. Raj
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Creep/fatigue/environmental interactions

1995
The cyclic behaviour of materials at high temperature is more complicated than its low-temperature equivalent, because the amplitude and the duration of the cycle both cause material damage.
R. K. Penny, D. L. Marriott
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Creep-Fatigue Interaction Models for Grade 91 Steel

Materials Performance and Characterization, 2014
Abstract Different approaches for modelling creep–fatigue (CF) interaction are used on strain controlled creep fatigue data of 9Cr–1Mo-VNb (P91) steel and assessed with the target of finding suitable candidates for use in design rules. The assessed models include time, ductility, and strain energy-based creep-fatigue interaction methods ...
Holmström, Stefan, Pohja, Rami, Payten, W.   +3 more
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Crack Growth Model under Creep-Fatigue Interaction

Advanced Materials Research, 2011
In the present paper, a new creep-fatigue crack growth model of J-integral criterion is proposed. The model is built based on the dislocation-free zone (DFZ) theory and cohesive zone model. The process of crack growth is viewed as the intermittent quasi-cleavage fracture of the DFZ.
Rui Zhang, Hong Liang Li
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Damage model of creep-fatigue interaction

Engineering Fracture Mechanics, 1979
Abstract The interaction between creep and fatigue has been studied theoretically by considering a macroscopic crack, interacting with continuously distributed microdamage. This damage is a measure of an assumed deterioration of the material. A Dugdale crack model is used with most deformation and damage concentrated to narrow regions ahead of the ...
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Creep-fatigue–environment interactions in INCONEL 617

Materials Science and Engineering: A, 2007
Creep-fatigue testing of alloy 617 was performed in air, vacuum, and purified Ar environments at 1000 °C. Tests were performed in axial strain control at total strain ranges of 0.3% and 1.0% (fully reversed) with hold times at maximum tensile strain ranging from 0 to 1800 s.
Terry C. Totemeier, Hongbo Tian
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Creep-Fatigue Interaction during Crack Growth

1973
The interaction between creep and fatigue processes has been investigated during crack growth in sheet specimens of the aluminum alloy 5052 at 400 F. Fractographic studies indicate that at high frequencies (1 /30 Hz) the fatigue process of crack advance is dominant, whereas at low frequencies (for example, 60 Hz) the creep process prevails.
PN Atanmo, AJ McEvily
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Mechanisms of Creep-Fatigue Interactions

1989
In this part an attempt is made (i) to show how intergranular fracture can be used to rationalise a number of observations related to high temperature fatigue behavior of metals and alloys and (ii) to analyse various forms of microstructural intergranular damage.
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Studies on crack growth rate under high temperature creep, fatigue and creep-fatigue interaction—I

Engineering Fracture Mechanics, 1980
Abstract Many experimental studies have been reported on the measurements of crack growth rate and the observation of crack growth behaviour under high temperature creep, fatigue and creep-fatigue interaction in literatures. However, many of them have been done in air atmosphere.
T. Yokobori, H. Sakata
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