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; Stephen W. Banovic; Richard L. Rhorer; Timothy J. Burns; Eric P. Whitenton; D Basak;|
|Title:||An electrical pulse-heated Kosky bar technique for high strain rate flow stress measurements of rapidly heated metals|
|Published:||September 13, 2009|
|Abstract:||We have developed a unique electrical pulse-heated Kolsky Bar technique for measuring the flow stress of metals at heating rates of up to 6000 °C per second and strain rates up to 10^4 per second. 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 may be bypassed, leading to unusual non-equilibrium superheated states. Flow stresses may thus differ significantly from equilibrium high temperature conditions. This paper briefly describes our pulse-heated Kolsky bar technique and discusses recent results on an AISI 1075 pearlitic steel heated rapidly up to and beyond the austenite formation temperature.|
|Pages:||pp. 457 - 462|
|Dates:||September 7-17, 2009|
|Keywords:||high strain rate,kolsky bar, pulse-heating, steel|
|Research Areas:||Metals, Materials performance, Materials Science|
|DOI:||http://dx.doi.org/10.1051/dymat/2009065 (Note: May link to a non-U.S. Government webpage)|