About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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Presentation Title |
Characterization of Transient State Deformation in Chips Produced by Modulation-assisted machining |
Author(s) |
Indrani Biswas, James Mann, Srinivasan Chandrasekar, Kevin P Trumble |
On-Site Speaker (Planned) |
Indrani Biswas |
Abstract Scope |
Modulation-assisted machining (MAM) incorporates a cutting tool which is modulated in a controlled fashion chipping out discrete particles out of a workpiece. This study is on characterization of Al-6061-T6 chips (fibers) made with MAM. The fibers are highly deformed with strains in the order of 2-4 depending on the modulation frequency. Because of the periodic nature of cutting, deformation occurs in a transient mode which imparts a non-uniform strain on the chip. Nano-indentation showed a 15% variation in the hardness across the chip length. Measurement of strain in the chips and observation of flow lines aid in understanding the role of deformation in controlling the chip shape. Interrupted linear cutting tests were performed to simulate periodic cutting and observe the chip detachment by in-situ imaging. It illustrated that shear failure occurs in the chip prior to completion of the cut leading to breakage of the chips from the workpiece. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |