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Title: Dynamic high-temperature Kolsky tension bar techniques

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 degrees C.
 [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [2]
  1. Sandia National Laboratories (SNL)
  2. ORNL
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Journal Volume: 94; Conference: 11th International DYMAT Conference, Lugano, Switzerland, 20150907, 20150911
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
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Country of Publication:
United States