Engineering Transactions, 60, 2, pp. 113–124, 2012
10.24423/engtrans.119.2012

Modelling the Peak Cutting Temperature During High-Speed Machining of AISI 1045 Steel

Timothy J. BURNS
National Institute of Standards and Technology, Gaithersburg, MD
United States

Steven P. MATES
National Institute of Standards and Technology, Gaithersburg, MD
United States

Richard L. RHORER
National Institute of Standards and Technology, Gaithersburg, MD
United States

Eric P. WHITENTON
National Institute of Standards and Technology, Gaithersburg, MD
United States

Debasis BASAK
Orbital Sciences Corporation, Dulles, VA
United States

This paper presents new experimental data on AISI 1045 steel from the NIST pulse-heated Kolsky Bar Laboratory. The material is shown to exhibit a stiffer response to compressive loading when it has been rapidly preheated, than it does when it has been heated using a slower preheating method, to a testing temperature that is below the eutectoid temperature. It is argued, using a simple model for heat generation in the workpiece and the tool during machining, due to Tlusty, that this work has important implications for the modelling of high- speed machining operations. Based on the experimental data, a modification is recommended of the well-known Johnson-Cook constitutive model of Jaspers and Dautzenberg for this material, in order to achieve improved predictions of the peak cutting temperature in machining.
Keywords: high-speed machining; thermal modelling; AISI 1045 steel; Kolsky bar
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Copyright © Polish Academy of Sciences & Institute of Fundamental Technological Research (IPPT PAN).

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DOI: 10.24423/engtrans.119.2012