Figure 8 shows that the grain density is remarkably increased when UST is applied below the liquidus temperature in Al containing TiB 2 particles and the difference in refinement with respect to the amount of Al 3 Ti 1 B master alloy (50, 200 ppm) is almost insignificant.
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Ultrasonic Processing for Structure Refinement: An Overview of Mechanisms and Application of the Interdependence Theory.
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