Dynamic Flow Stress Measurements for Machining Applications
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 as austenite formation in carbon steels, that can have profound effects on their mechanical viscoplastic behavior. The NIST electrically-pulse-heated Kolsky bar was developed specifically to probe material response under conditions approaching those present during machining operations. We have achieved heating rates in excess of 1000 °C/s combined with strain rates above 1000 s-1 with this system. This paper presents recent experimental results for AISI 1045 and AISI 1075 steel using the pulse-heated Kolsky Bar, and examines some aspects of the uncertainty of the method.
Society for Experimental Mechanics (SEM) Annual Meeting
, Vax, E.
, Rhorer, R.
, Kennedy, M.
, Whitenton, E.
, Banovic, S.
and Burns, T.
Dynamic Flow Stress Measurements for Machining Applications, Society for Experimental Mechanics (SEM) Annual Meeting, Greenville, SC, [online], https://doi.org/10.1007/978-3-319-06995-1
(Accessed December 4, 2023)