What Can Plastic Flow Fields Tell Us About Heat Sources in Deformation Processing?

Udupa, A and Sundaram, NK and Mahato, A and Sugihara, T and Mann, JB and Chandrasekar, S (2022) What Can Plastic Flow Fields Tell Us About Heat Sources in Deformation Processing? In: JOM .

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Abstract

We characterize primary (shape-change) and secondary (friction) deformation, and associated temperature fields, in metal cutting and forming processes, using in situ imaging and simulation. The experimental configurations enable access to the deformation zones and die contact interfaces, for measuring deformation, temperature, and frictional drag. Infrared thermography reveals that the plastic strain-rate field is an excellent proxy for the deformation-induced heat sources. Both spatially confined and diffuse strain-rate fields occur, depending on the initial workpiece deformation state. When the strain rate is confined, as in prehardened material, the temperature modeling is greatly simplified, as the heat source is also now localized. However complex, microstructure-driven deformation modes, such as sinuous flow in annealed metals, result in spatially diffuse strain-rate and body heat sources that are more challenging to analyze. Our unified measurements should be of value for accurately estimating the fraction of plastic dissipation that is converted into heat in large-strain deformation processes. © 2021, The Minerals, Metals & Materials Society.

Item Type:	Journal Article
Publication:	JOM
Publisher:	Springer
Additional Information:	The copyright for this article belongs to Springer
Keywords:	Friction; Metal cutting; Plastic flow; Thermography (imaging), Contact interface; Cutting and forming; Deformation processing; Deformation zone; Heat sources; Metal cutting process; Metal-forming process; Shape change; Situ imaging; Strain-rates, Strain rate
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	10 Feb 2022 11:53
Last Modified:	10 Feb 2022 11:53
URI:	http://eprints.iisc.ac.in/id/eprint/71159

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