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DOI 10.5286/raltr.2016012
Persistent URL http://purl.org/net/epubs/work/31523030
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Record Id 31523030
Title A thermal impulse method to measure the strength of conducting materials at high temperatures and strain rates
Abstract A method of measuring the strength of conducting materials and Young’s modulus of elasticity at high temperatures and strain rates is described. A pulse of electrical current is passed through a thin wire at high temperatures to excite a thermal strain oscillation and corresponding stress. At some combination of temperature and stress the wire will fail. The stress is measured by calculation from the current pulse. Measurements have been made on tungsten at temperatures up to ~3000 K, tantalum up to ~2000 K and molybdenum up to ~2000 K, at strain rates of ~103 s-1. The frequency of the oscillations gives Young’s modulus of elasticity. While the method is good for measuring ultimate tensile strengths of materials at high temperatures it is limited in the minimum temperature that can be measured. An example is given for tungsten where the strength is not measurable below a temperature of ~700°C.
Organisation ISIS , STFC
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Licence Information: Creative Commons Attribution 3.0 Unported (CC BY 3.0)
Language English (EN)
Type Details URI(s) Local file(s) Year
Report RAL Technical Reports RAL-TR-2016-012. 2016. RAL-TR-2016-012.pdf 2016