Recent Results from the NIST Pulse-Heated Kolsky Bar

Published

September 3, 2007

Author(s)

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

Abstract

A Kolsky bar laboratory for measuring dynamic material properties, in support of improved finite-element modeling of high-speed machining processes, has been developed at the National Institute of Standards and Technology (NIST). The NIST split-Hopkinson pressure bar has the capability of electrically pulse heating a test sample to a temperature on the order of 1000oC in less than a second, then holding the sample at a fixed high temperature for several seconds (if desired), followed by loading of the sample in a dynamic compression test. Recent advances in temperature measurement and control capabilities are discussed, together with recent results on the constitutive response of AISI 1045 steel. The goal of the work is to study the influence of the rate of heating and time at high temperature on the stress-strain response of the material, which depends upon the dynamic evolution of the material's microstructure.

Proceedings Title

Proceedings of the 2007 Society for Experimental Mechanics Annual Conference

Conference Dates

June 3-6, 2007

Conference Location

Springfield, MA, USA

Conference Title

2007 Society for Experimental Mechanics Annual Conference

Pub Type

Conferences

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Keywords

Kolsky bar apparatus, PID control, pulse heating, pyrometry, temperature control

Citation

Burns, T. , Mates, S. , Rhorer, R. , Whitenton, E. and Basak, D. (2007), Recent Results from the NIST Pulse-Heated Kolsky Bar, Proceedings of the 2007 Society for Experimental Mechanics Annual Conference, Springfield, MA, USA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=51150 (Accessed December 26, 2024)