Eur. Phys. J. Special Topics 206, 25-33 (2012)
https://doi.org/10.1140/epjst/e2012-01583-5

Regular Article

Development of high-temperature Kolsky compression bar techniques for recrystallization investigation

¹ Sandia National Laboratories, Livermore, CA 94550, USA
² Brigham Young University, Provo, UT 84602, USA

^a e-mail: bsong@sandia.gov

Received: 11 November 2011
Revised: 13 March 2012
Published online: 7 May 2012

Abstract

We modified the design originally developed by Kuokkala’s group to develop an automated high-temperature Kolsky compression bar for characterizing high-rate properties of 304L stainless steel at elevated temperatures. Additional features have been implemented to this high-temperature Kolsky compression bar for recrystallization investigation. The new features ensure a single loading on the specimen and precise time and temperature control for quenching to the specimen after dynamic loading. Dynamic compressive stress-strain curves of 304L stainless steel were obtained at 21, 204, 427, 649, and 871 ^∘C (or 70, 400, 800, 1200, and 1600 ^∘F) at the same constant strain rate of 3320 s⁻¹. The specimen subjected to specific time and temperature control for quenching after a single dynamic loading was preserved for investigating microstructure recrystallization.