The relationship between contact fatigue life and fracture characteristic parameters is studied for two kinds of bearing steel from the measurements of contact fatigue life, fracture toughness KIC and crack
The analysis of the tensile fracture surfaces reveal that the extruded Al-4% Mg alloys with and without the addition of Ce exhibit the typical ductile fracture characteristic.
The results indicate that at high stress ratio (R =0.9) the static state tensile mechanics is the dominant factor in the fracture mechanisms. With the decrease of the stress ratio R, the fractograph presents evident fatigue fracture characteristic.
The distribution of accumulated Al7Cr, its hardness and wear resistance were tested, the effects of mould temperature and Cr content on microstructure were discussed, the formation process of composites and its fracture characteristic were also analysed.
Based on the basic mechanics performance and fracture characteristic experimentations of early-age concrete, the characteristics of damage and fracture for early-age concrete were numerically analyzed in this thesis by way of the general finite element code ABAQUS.
In the present work, the solidification microstructure, elements distributing, fracture characteristic and microhardness characteristic of the hermetic surface of valves was studied by Scanning Electron Microscope (SEM), Energy Disperse Spectroscopy (EDS) and microhardness testing technique. And the difference between laser cladding and plasma spray welding was investigated for giving support for the application of cobalt-based alloy laser cladding on repairing of the hermetic surface of valves.
In order to study the effects of ageing treatment on impact property of AZ80 magnesium alloy,the modern metallurgy analysis and test methods were adopted. The changing law of impact toughness and impact fracture characteristic were investigated with AZ80 magnesium alloy at different ageing Treatment temperature.
In particular, such steels can be susceptible to delayed fracture characteristic for high-strength steels with a martensite or bainite structure.
The microstructure and fracture characteristic of a pressureless-sintered (Si-Al-O-N)-6 wt% SiC composite have been investigated by a combination of transmission electron microscopy and microindentation fracture technique.
Fracture characteristic of a (Si-Al-O-N)-SiC composite studied by transmission electron microscopy
Typical fracture characteristic values like load-displacement curve and specific fracture energy of the new wood laminate compound PARALLAM? PSL were determined by using the wedge splitting technique.
The fracture characteristic of this cultivar was that a few large fractures occurred globally.