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Controlling segmentation in cutting of metals

Saei, Mojib and Udupa, Anirudh and Viswanathan, Koushik and Sugihara, Tatsuya and M'Saoubi, Rachid and Chandrasekar, Srinivasan (2019) Controlling segmentation in cutting of metals. In: CIRP ANNALS-MANUFACTURING TECHNOLOGY, 68 (1). pp. 41-44.

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Official URL: https://dx.doi.org/10.1016/j.cirp.2019.04.073

Abstract

We examine segmented chip formation and associated flow dynamics in cutting of metals of low-tomoderate workability using high-speed imaging. Segmentation is initiated by a surface instability formation of a ductile crack in a prow - on workpiece surface ahead of the tool, this crack then propagates towards the tool tip. Prow-crack initiation occurs at a critical strain 0.75 that is independent of material and deformation geometry. This ductile failure is analyzed in terms of local hydrostatic stress state and stress triaxiality. Material-agnostic methods to suppress and enhance segmentation using constrained cutting and a mechanochemical effect are demonstrated.

Item Type: Journal Article
Additional Information: copyright for this article belongs to ELSEVIER SCIENCE BV
Keywords: Machining; Fracture analysis; High-speed imaging
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Depositing User: Id for Latest eprints
Date Deposited: 30 Jul 2019 11:51
Last Modified: 30 Jul 2019 11:51
URI: http://eprints.iisc.ac.in/id/eprint/63341

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