Quantitative correlation between fracture toughness K1C and the short-term strength ?b, ?0�2 of tungsten

Chemically produced nanostructured ODS–lanthanum oxide–tungsten composites sintered by spark plasma

“…Due to very high melting point, its sintering is carried out at higher temperatures, usually followed by hot mechanical working to achieve a high density material, since relative density is a major factor which determines the mechanical properties of bulk tungsten [7,8]. Consequently, processing of tungsten involves prolonged exposure to higher temperatures resulting in grain growth, which reduces room-temperature mechanical properties by grain boundary weakening [7,9]. On the other hand, tungstenbased materials inherently exhibit low toughness and almost no ductility (bcc structure) so they cannot be employed for structural applications at temperatures lower than DBTT.…”

Recrystallization kinetics of warm-rolled tungsten in the temperature range 1150–1350 °C

“…[3,6,9,11,12], but apparently no investigation of the long-term annealing kinetics has been performed, despite the importance for the lifetime and reliability of nuclear fusion reactors components.…”

“…This causes degradation of the excellent material properties as a loss in mechanical strength [5] and embrittlement due to increased grain sizes and local internal stress at grain boundaries [6,7]. Other detrimental effects include a decrease in fracture toughness [8,9] and an increase in the ductile-to-brittle-transitiontemperature (DBTT) [8,10].…”