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Showing 1 to 11 of 11 for “"influence of grain size"”.
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Influence of grain size, morphology and aggregation on galena dissolution
The acidic, non-oxidative dissolution of galena nanocrystals has been studied using both microscopic and wet-chemical methods. The effects of particle size, shape, aggregation state, and grain proximity on dissolution rates were investigated. Nearly monodisperse galena nanocrystals with an average …
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Influence of grain size and niobium content on the creep resistance of ferritic stainless steels
… stainless steel is used for the production of catalytic converter housings. As the housing is subjected to high temperatures it is necessary that the material offers creep resistance. Type 441 is dual stabilised with Ti and Nb to provide improved weldability; however, Nb addition also …
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Influence of grain size evolution and water content on the seismic structure of the oceanic upper mantle
Grain size is an important material property that has significant effects on the viscosity, dominant deformation mechanism, attenuation, and shear wave velocity of the oceanic upper mantle. Several studies have investigated the kinetics of grain size evolution, but have yet to incorporate these …
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Influence of Grain Size and Widmanstätten Colonies on Variability of Tensile Properties of Forged Ti-6Al-4V
… This triggered an investigation into two of the parts from the lot that did not meet specification. The ultimate reason for failure was due to lower than necessary yield strength and ultimate tensile strength values, as well as unwanted variability between regions of the part. Therefore, …
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Influence of grain size evolution and water content on the seismic structure of the oceanic upper mantle
Grain size is an important material property that has significant effects on the viscosity, dominant deformation mechanism, attenuation, and shear wave velocity of the oceanic upper mantle. Several studies have investigated the kinetics of grain size evolution, but have yet to incorporate these …
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An investigation of the influence of grain size on stress wave attenuation and dispersion in rock like materials
<p>"A mathematical model which is independent of any specific physical mechanism and based on two port linear network theory is developed to describe attenuation and dispersion in a medium. The assumption is made that the ll medium behaves in a linear manner. The influence of grain size on …
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Influence of grain size of a porous medium on the movement of diesel fuel due to water table fluctuations
… were conducted in a sand tank to determine the influence of grain size of a porous medium and residual water saturation on the movement of diesel fuel. Three different grades of sand (#12, #20, and #30 grades with mean grain diameters of 0.178cm, 0.08cm, and 0.056cm respectively) were used in …
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BULK NANOSTRUCTURED STEELS FOR NUCLEAR REACTOR AND EXTREME ENVIRONMENT APPLICATIONS
… (HPT) were used to produce bulk ultra-fine grained and nanocrystalline Kanthal-D [KD; Fe-21Cr-5Al-0.026C (wt.%) alloy] which resulted in an improvement in strength of up to 3 times their nominal strength from grain boundary strengthening, and dislocation strengthening. Dynamic recovery was …
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Remote estimation of grain size distribution and simulating grain size effects on debris-flow rheology and post-fire variability of transport by dry ravel
The size distribution of granular material influences the length scale of sediment transport by dry ravel and debris flows. Variability in erosion rates and the grain size distribution of material delivered to channels has been observed due to an increase in the annual areal extent of wildfire in …
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Sediment size effects on self-organisation behaviour of rip channels
… sandy beach, which are critical to the erosion of beaches as well as the safety of beach visitors. Field observations indicate the wave conditions and sediment characteristics exert the controlling effects on the states of beaches and determine the development of rip channel system. Although the …
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Zyklische Plastizität von mikro- und submikrokristallinem Nickel
Im Rahmen der vorliegenden Arbeit wurde der Einfluss der Korngröße und der Gefügestabilität auf die zyklische Plastizität von mikro- und submikrokristallinem Nickel, hergestellt durch ECAP und PED, untersucht. Zur Gefügecharakterisierung kamen verschiedene elektronenmikroskopische und …