Strain Rate Dependence of the Tensile Flow Stress of Pure Tantalum

Strain Rate Dependence of the Tensile Flow Stress of Pure Tantalum

Strain rate and temperature dependence of flow properties of tantalum or tantalum alloy is very important from an engineering standpoints and in viewpoints of technical application of these metals or alloys at cryogenic temperature service.

In the present study, the flow or yielding behaviors of electron beam melted pure tantalum were studied experimentally mainly in viewpoints of strain rate or temperature dependence of the flow and yield (0.2% proof) stress of pure tantalum.

Activation energy or activation volume and frequency factor etc, which are directly linked with dislocation behaviors of the pure tantalum, were also evaluated from macroscale measurements in tensile testapplying incremental strain rate or temperature change test of the temperature and strain rate dependent tensile properties of the electron beam melted pure tantalum encountered in low temperature testing.

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