Advanced Manufacturing

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Advanced machining technologies such as ultrasonic vibration assisted machining (UAM) and laser assisted machining (LAM) were developed to enhance the machinability of high-strength materials, including nickel alloys and bulk metallic glasses. One key challenge in machining these materials is shear banding, which results in serrated chip formation and deteriorated surface quality. The shear banding mechanisms in the UAM and LAM processes are not known. The objective of this research is to quantitatively determine the critical factors causing shear banding. The outcome will provide optimum conditions to enhance the process performance without trial and error in aerospace and automotive industries.