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
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Revised: 13 March 2012
Published online: 7 May 2012
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.
© EDP Sciences, Springer-Verlag, 2012