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The investigation of ultrasonic melt degassing allowed us to establish a relationship between
hydrogen removal and effect of ultrasonic field, namely acoustical cavitation. The cleaning of the melt to
remove gaseous and solid impurities during ultrasonic treatment improves the quality of as-cast and
deformed metal (the density and plasticity). It should be noted that the bubble-aided hydrogen removal is
accompanied by oxide flotation.
The irradiation of metallic melts by ultrasonic waves favorably influences degassing, grain refinement,
dispersive effect and mixing. Obviously, the experimental findings reported here do not exhaust this very
promising subject, and more thorough investigations are currently underway. This work mainly investigates
the optimal conditions for the irradiation of solidifying alloys by ultrasonic waves vibrating at the
fundamental resonance frequency.
originally posted by: UMayBRite!
a reply to: Xeven
The strength/weakness of steel is largely determine by grain size. This is
basically the crystaline structure. Cracks arise between the grains. Anything
that reduces the size of the grains makes the steel stronger and tougherl Quick cooling
help accomplish this. So does alloying.
One of the factors in in Damascus steel swords was that they were forged repeately, reducing
the grain size.
Could sound be used effectively to accomplish this? Interesting thought...