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Dynamic high-temperature Kolsky tension bar techniques...

Publication Type
Conference Paper
Journal Name
EPJ Web of Conferences
Publication Date
Page Number
1
Volume
94
Issue
01066
Conference Name
11th International DYMAT Conference
Conference Location
Lugano, Switzerland
Conference Date
-

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.