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AssigneeGM Global Technology Operations LLC
InventorsQigui Wang, James W. Knight
Estimating the term…
A method to automatically quantify dendrite arm spacing in dendritic microstructures. Once a location of interest in a cast material specimen has been identified, the information contained in it is automatically analyzed to quantify dendrite cell size information that is subsequently converted into a quantified dendrite arm spacing through an empirical relationship or a theoretical relationship. In one form, the relationship between DCS and DAS is such that the DAS in dendritic structure of cast aluminum alloys may be automatically determined from the measurement of one or more of dendrite cell size and the actual volume fraction of the eutectic phases in the local casting microstructure. Non-equilibrium conditions may be accounted for in situations where a theoretical volume fraction of a eutectic phase of the alloy in equilibrium condition is appropriately modified. Thus, in situations where equilibrium conditions—such as those where the casting is cooled very slowly during solidification—does not apply (such as during rapid cooling and consequent solidification), the eutectic measured in the non-equilibrium condition, which can be smaller than the theoretical value in equilibrium, can be accounted for.
A method of automatically quantifying dendrite arm spacing in a dendritic microstructure of a cast aluminum-based material, said method comprising:
A method of automatically quantifying dendrite arm spacing in an aluminum-based dendritic microstructure, said method comprising:
An article of manufacture comprising a non-transitory computer usable medium having computer readable program code embodied therein for automatically quantifying dendrite arm spacing for an aluminum-based cast material, said computer readable program code in said article of manufacture comprising:
Dependencies are inferred from the claim text.