Taylor test on austempered ductile cast iron
2,248 views · Published 6 October 2014 · 0:18 · Indexed 10 November 2026
Channel: bhadeshia123 · 2014 · Education
This movie showing a Taylor high-strain rate dynamic deformation test has kindly been provided by Drs Dawid Myszka, A. Wieczorek and Tadeusz Cybula, Warsaw University of Technology, Poland. Published in Archives of Metallurgy and Materials 59, DOI: 10.2478/amm-2014-0204 "One of the simplest methods for subjecting a metal to a high stress for a short time is to form it into a cylindrical specimen and fire this at a steel target. The front part of this projectile crumples up, but the rear part is left undeformed. If the target is rigid the distance which this portion travels while it is being brought to rest may be taken as the difference between the initial length and the length of the deformed specimen after impact. Knowing the velocity of impact, a minimum possible value can be assigned to the maximum acceleration of the material, and from this a minimum value for the yield stress can be calculated. The actual yield stress is considerably greater than this minimum, and methods are given for calculating a more probable value." This quote is from G.I. Taylor: The use of flat-ended projectiles for determining dynamic yield stress, Proc. Roy. Soc. London A, 194 (1948), p. 289). The resulting data can be used to estimate the plasticity of the metal at large strain rates. http://www.phase-trans.msm.cam.ac.uk/2001/adi/cast.iron.html http://youtu.be/R7c1V4heDrc
