The nature of the brittle-to-ductile transition of ultra fine grained tungsten (W) foil

Texture evolution and basic thermal–mechanical properties of pure tungsten under various rolling reductions

“…The results from Ref. [19] suggested that the DBTT can be shifted to lower temperature by cold rolling, but the 80% and 90% deformed tungsten plates in this paper exhibited bad Charpy impact properties. This phenomenon can be mainly caused by the cracks.…”

Refractory Materials for Energy Applications

“…After severe cold‐rolling, the semi‐finished products are in general thin foils with a thickness of ≈100 μm. These foils possess exceptional mechanical properties, but they are of no use for any structural application.…”

Tungsten laminates made of ultrafine-grained (UFG) tungsten foil — Ageing of tungsten–titanium (W–Ti) laminates

“…In the S-direction the grain size distribution ranges mainly between 0.2 and 0.5 μm [6,25]. The rolled foil has a pronounced rotated cube texture, {001}b110 N, and contains a high percentage of low angle subgrains, which is well known in severe cold rolled metals.…”

“…Tungsten foil in the as-rolled (and stress-relieved) condition has exceptional mechanical properties in terms of ductility [3], toughness [4,5], and brittle-to-ductile transition (BDT) [6].…”

“…[7]). Finally Németh et al [6] evaluated the nature of the BDT of annealed coarse-grained and asreceived ultrafine-grained (UFG) tungsten foil. For the UFG tungsten foil they determined a BDTT of about 77 K, assuming that the BDT in UFG tungsten is controlled by the glide of edge dislocations.…”