https://doi.org/10.1051/epjconf/20159401066
Dynamic high-temperature Kolsky tension bar techniques
1 Sandia National Laboratories, Albuquerque, NM 87185, USA
2 Sandia National Laboratories, Livermore, CA 94550, USA
3 Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
a e-mail: bsong@sandia.gov
b e-mail: knelso@sandia.gov
c e-mail: rjlipin@sandia.gov
d e-mail: jbignel@sandia.gov
e e-mail: ulrichgb@ornl.gov
f e-mail: easo.george@rub.de
Published online: 7 September 2015
Kolsky tension bar techniques were modified for dynamic high-temperature tensile characterization of thin-sheet alloys. An induction coil heater was used to heat the specimen while a cooling system was applied to keep the bars at room temperature during heating. A preload system was developed to generate a small pretension load in the bar system during heating in order to compensate for the effect of thermal expansion generated in the high-temperature tensile specimen. A laser system was applied to directly measure the displacements at both ends of the tensile specimen in order to calculate the strain in the specimen. A pair of high-sensitivity semiconductor strain gages was used to measure the weak transmitted force due to the low flow stress in the thin specimen at elevated temperatures. As an example, the high-temperature Kolsky tension bar was used to characterize a DOP-26 iridium alloy in high-strain-rate tension at 860 s−1/1030 ∘C.
© Owned by the authors, published by EDP Sciences, 2015
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
