Effect of grain orientation and heat treatment on mechanical properties of pure W

Microstructure and tensile properties of tungsten at elevated temperatures

“…500 C. Nevertheless, some tensile data obtained by Noto et al[9] from a 12 mm thick rolled tungsten plate (produced by A.L.M.T. Corp.) for the ITER diverter application are comparable with the present results.…”

“…At 300 C the Group-B specimens became nearly fully ductile, whereas the Group-A specimens demonstrated a situation similar to that of the Group-B specimens at 250 C. This indicates that the ductile-to-brittle transition temperature of Group-B specimens is about 50 C lower than that of the Group-A specimens. The difference in ductility of the two groups of specimens could be attributed to grain orientation effect, because crack propagation along rolling direction is easier, as observed by Noto et al on hot-rolled or extruded tungsten [9].…”

Extraordinary high ductility/strength of the interface designed bulk W-ZrC alloy plate at relatively low temperature

“…Above 150 °C, the specimens were bent to about 50 o (limited by testing device) without failure, which further exhibits the excellent ductility and plasticity of bulk WZC plate. The flexural strength of 2.5 GPa and strain of 3% at RT of the present WZC plates with thickness of 8.5 mm are superior when compared with the ITER grade pure W fabricated by PLANSEE Company 24 , which exhibits weak plasticity at RT in 1.5 mm thick plate. However, as the thickness of the plate increases up to 2.0 mm, the PLANSEE W plates exhibit significant decreasing plasticity and flexural strength and finally become completely brittle at a thickness of 10 mm.…”