Take a sneak peek at the new NIST.gov and let us know what you think!
(Please note: some content may not be complete on the beta site.).
NIST Authors in Bold
|Author(s):||Steven P. Mates; Richard L. Rhorer; Eric P. Whitenton; Timothy J. Burns; D Basak;|
|Title:||A Pulse-Heated Kolsky Bar Technique for Measuring Flow Stress of Metals at High Loading and Heating Rates|
|Published:||April 05, 2008|
|Abstract:||The National Institute of Standards and Technology (NIST) has developed an electrical pulse-heated Kolsky Bar technique for measuring the constitutive response of metals at heating rates of up to 6000 K/s and strain rates up to 104 1/s. Under these conditions, which are approaching those found in high speed machining, thermally-activated microstructural processes such as grain growth, solid state phase transformation and dislocation annealing can be bypassed, leading to unique non-equilibrium superheated microstructural states. Flow stresses can thus differ significantly from equilibrium high temperature conditions. This paper describes the NIST pulse-heated Kolsky bar technique in detail, including a thorough assessment of uncertainties in temperature and flow stress measurement.|
|Pages:||pp. 799 - 807|
|Keywords:||flow stress measurement,high strain rate,Kolsky Bar,pulse heating|
|DOI:||http://dx.doi.org/10.1007/s11340-008-9137-1 (Note: May link to a non-U.S. Government webpage)|