Tape cast isotropic, fine-grained tungsten for thermo-cyclic loading applications

Abstract

This paper introduces tape casting as a new route for the production of isotropic and fine-grained tungsten components. Microstructural and thermal properties of tape cast tungsten samples are determined. Thermal shock behavior according to the thermo-cyclic loading of standing X-ray anodes is investigated and compared to the behavior of a rolled tungsten grade. The development of surface roughness during the thermal shock loading is discussed in relation to the development of the grain structure and crack pattern. The finegrained and stable microstructure of the tape cast material exhibits less roughening under such test conditions.