Abstract
The effects of elevated temperature at high strain rate of a commercial tungsten alloy were investigated. The tests were carried-out at high strainrate (from 850 to 2200 1/s) by means of a Split Hopkinson Tension Bar device on round specimens having diameter and gauge length of 2mm and 5 mm, respectively. The thermal conditions were obtained by means of a water-cooled induction heating system on the specimen mounted on the SHTB. The dependence of ultimate tensile strength on temperature was found to decrease, while the failure strain increased with temperature. The strain rate linearly growths with the temperature.
Highlights
The tungsten alloys are two-phase composite materials combining the advantageous properties of the tungsten phase and the matrix phase
The tests were carried-out at high strainrate by means of a Split Hopkinson Tension Bar device on round specimens having diameter and gauge length of 2mm and 5 mm, respectively
The thermal conditions were obtained by means of a water-cooled induction heating system on the specimen mounted on the Split Hopkinson Tension Bar (SHTB)
Summary
The tungsten alloys are two-phase composite materials combining the advantageous properties of the tungsten phase and the matrix phase They possess outstanding physicochemical properties such as high density, high strength, high hardness, good corrosion resistance, high thermal conductivity and wear resistance. Thanks to these characteristics they are widely used in numerous engineering applications in aerospace, machining. This study presents the dynamic tensile behaviour of a commercial tungsten alloy These alloys are frequently subjected to harsh regimes of strain-rate and often combined with elevated temperature. The main objective of this experimental study is to determine the mechanical response of a commercial tungsten alloy when subjected to high strain-rate in tension at elevated temperature.
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