Results 261 to 270 of about 191,694 (304)
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Irradiation creep models — an overview
Journal of Nuclear Materials, 1988Abstract The modelling of irradiation creep is now highly developed but many of the basic processes underlying the models are poorly understood. A brief introduction is given to the theory of cascade interactions, point defect clustering and dislocation climb. The range of simple irradiation creep models is reviewed including: preferred nucleation of
J.R. Matthews, M.W. Finnis
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Creep and creep modelling of a multimodal nickel-base superalloy
Acta Materialia, 2011The creep properties of different γ'-Ni3Al distributions in the Ni115 nickel superalloy produced by heat treatment have been examined. At the stresses and temperatures employed it is shown that particle bypass cannot occur by cutting or bowing and so presumably occurs by a climb-glide motion.
Coakley, James +2 more
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Creep modeling and creep life estimation of Gr.91
International Journal of Materials Research, 2012Abstract The creep behavior and deciding factors for creep life have been investigated for Gr.91 in the temperature range between 450 and 725°C. The longest time to rupture was 68755 h. The creep life is inversely proportional to the minimum creep rate multiplied by the increase in creep rate by strain in the acceleration region for a ...
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A coupled creep damage evolution model and creep life evaluation
Materials at High Temperatures, 2018Due to the damage accumulation during creep deformation, creep failure after a certain service time is the most important failure mode for metal structures working at high temperatures.
Mingchen Huo, Jinquan Xu
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Comparative Creep Life Evaluation of HR3C Using Creep Damage Models
Volume 6A: Materials and Fabrication, 2017Recently, due to both environmental and energy efficiency, the designed life cycle of many power plant have been extended and also their operating temperature increased. When a material is exposed to high temperature over 50% of its melting temperature, it often shows unusual creep behavior in which the long time exposure of high temperature causes a ...
Seok-Jun Kang +3 more
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Modelling of steel creep at high temperatures using implicit creep model
2012Behaviour of steel structures at high temperatures is greatly influenced by the level of creep strains that occur after reaching the temperature above one third of the melting point of steel. For structural carbon steel, this occurs after reaching the structure temperature above 400°C.
Torić, Neno +3 more
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Il Nuovo Cimento D, 1991
Experimental results of dynamic modulus and internal friction, measured directly during creep deformation, and back-stress data from dip test measurements are considered for an explanation of the power law of creep. The explanation is essentially based on the assumption that stationary creep depends on dislocations in the subgrain interior with zones ...
P. GONDI, SILI, Andrea Mariano
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Experimental results of dynamic modulus and internal friction, measured directly during creep deformation, and back-stress data from dip test measurements are considered for an explanation of the power law of creep. The explanation is essentially based on the assumption that stationary creep depends on dislocations in the subgrain interior with zones ...
P. GONDI, SILI, Andrea Mariano
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Remaining Creep Life Assessment Techniques Based on Creep Cavitation Modeling
Metallurgical and Materials Transactions A, 2009The boiler and its components are built with assumed nominal design and reasonable life of operation about two to three decades (one or two hundred thousand hours). These units are generally replaced or life is extended at the end of this period. Under normal operating conditions, after the initial period of teething troubles, the reliability of these ...
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Creep Fracture: Creep Laws and Elementary Microscopic-Fracture Models
2001This chapter begins with some background on the theory of creep-flow behavior by dislocation motion, by defect motion, or by the combined effect of both. This elementary knowledge allows for the establishment of laws and rules of creep flow on a macroscopic scale.
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Modelling of ICA creep properties
4th International Conference on Adhesive Joining and Coating Technology in Electronics Manufacturing. Proceedings. Presented at Adhesives in Electronics 2000 (Cat. No.00EX431), 2002Flip chip bonding with isotropically conducting adhesives is gaining in popularity since it can simplify and reduce the cost of the interconnecting process. To effectively estimate the reliability of ICA flip chip joints, one needs to model the viscoelastic behaviour of the adhesives.
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