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Search Publications by: Eric Whitenton (Ctr)

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Displaying 26 - 50 of 170

Dynamic Flow Stress Measurements for Machining Applications

December 19, 2014
Author(s)
Steven P. Mates, Eran Vax, Richard Rhorer, Michael B. Kennedy, Eric P. Whitenton, Stephen W. Banovic, Timothy J. Burns
Metals undergo a combination of rapid loading and rapid heating during normal and high speed machining processes. Constitutive models for these materials, however, generally lack any information regarding kinetics of thermally-induced transformations, such

Infrared Thermography for Laser-Based Powder Bed Fusion Additive Manufacturing Processes

July 26, 2013
Author(s)
Shawn P. Moylan, Eric P. Whitenton, Brandon M. Lane, John A. Slotwinski
Additive manufacturing (AM) has the potential to revolutionize discrete part manufacturing, but improvements in processing of metallic materials are necessary before AM will see widespread adoption. A better understanding of AM processes, resulting from

Transient Convection-Diffusion Modelling of Peak Temperature in Orthogonal Cutting

August 19, 2012
Author(s)
Timothy J. Burns, Steven P. Mates, Richard L. Rhorer, Eric P. Whitenton, Debasis Basak
Numerical finite-difference simulations of a two-dimensional transient fast convection-slow diffusion model of the temperature field in orthogonal cutting, due to Tlusty, have been shown to provide better predictions of the peak temperature during

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

May 22, 2012
Author(s)
Timothy J. Burns, Steven P. Mates, Richard L. Rhorer, Eric P. Whitenton, Debasis Basak
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

Preliminary Investigation of Polarization Effects During Metal Cutting

April 28, 2011
Author(s)
Eric P. Whitenton
Under certain conditions, the polarization state of infrared light emitted by metal changes when the metal is strained. During cutting, metal is severely strained. Assessing both strain and strain rate is of interest to the metal cutting research community

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

January 3, 2011
Author(s)
Timothy J. Burns, Steven P. Mates, Richard L. Rhorer, Eric P. Whitenton, Debasis Basak
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
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