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The purpose of this work was to compare the mechanical and physical properties for 0.5% Niobium alloyed ductile iron (0.5% Nb-DI) with commercial ductile iron (DI) before and after austempering process. The materials for this investigation were produced by conventional CO2 sand casting process and machined to TS EN 10001 standards for tensile test and ASTM E23 for Charpy impact test. Hardness test,...
In this paper,the mechanical reliability evaluation for micro/nano-structure in MEMS devices is analyzed to establish theories of MEMS materials, especially of silicon.In order to evaluate the mechanical strength of micro/nano-structure in the same dimensions as the actual devices, we have developed a tensile testing method and testing tools dedicated for micron-sized specimens.We have evaluated the...
Results of investigation of silicon additions and processing parameters on mechanical properties and microstructure of the iron-base sintered materials are presented. Green density as well as as-sintered density, hardness, tensile strength, transverse rupture strength and impact toughness were measured. As-sintered microstructures were also examined. The results indicate marked effect of silicon additions,...
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