Dynamic Properties for Modeling and Simulation of Machining: Effect of Pearlite to Austenite Phase Transition on Flow Stress in AISI 1075 Steel

Published

January 3, 2011

Author(s)

Timothy J. Burns, Steven P. Mates, Richard L. Rhorer, Eric P. Whitenton, Debasis Basak

Abstract

The Pulse-Heated Kolsky Bar Laboratory at the National Institute of Standards and Technology (NIST) has been developed for the measurement of dynamic properties of metals. Because high-speed machining processes can lead to extremely rapid heating of a material, followed by rapid cooling, our research program has been directed in part at studying the influence on flow stress of the heating rate and the time-at-temperature prior to impact in rapid compression tests on car-bon steels. The unique pulse heating capability of the NIST Kolsky bar system enables rapid uni-form pre-heating of an experimental test sample from room temperature to several hundred de-grees C in less than a second, prior to a Kolsky bar test. We present new results on AISI 1075 steel, which demonstrate constitutive response behavior that cannot be predicted by the Johnson-Cook flow stress model that is widely used in simulations of high-speed machining processes.

Citation

Machining Science and Technology

Volume

15

Issue

1

Pub Type

Journals

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Keywords

AISI 1075, Johnson-Cook, material behavior, metal cutting, SHPB, strain, strain rate, temperature

Citation

Burns, T. , Mates, S. , Rhorer, R. , Whitenton, E. and Basak, D. (2011), Dynamic Properties for Modeling and Simulation of Machining: Effect of Pearlite to Austenite Phase Transition on Flow Stress in AISI 1075 Steel, Machining Science and Technology, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=904072 (Accessed September 15, 2024)