Metal Deformation in Macrosonic Fields 650760

With the powerful ultrasonic transducers now available, the apparent static forces necessary for plastic deformation of metals can be markedly reduced, and even high-strength metals can be fractured without application of an external static load. To use high acoustic power in large-scale forming processes, it is necessary to establish fundamental parameters such as acoustic energy density, heating rate, and efficient coupling of sound and workpiece. Acoustic radiation is shown to affect material properties while aiding their plasticity, and limits can be determined within which sound can be applied without deteriorating properties.


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