Ductilisation of tungsten (W): Tungsten laminated composites

摘要: Here we elucidate the mechanisms of plastic deformation and fracture tungsten laminated composites. Our results suggest that mechanical response laminates is governed by plies. In most cases, impact interlayer secondary importance. Severely cold-rolled ultrafine-grained foils possess exceptional properties in terms brittle-to-ductile transition (BDT), toughness, tensile ductility. The motivation for investigating composites to determine whether a bulk material can be made retains ductility thin foils. In this paper analyse W-AgCu, W-Cu, W-V, W-Pd their as-produced annealed conditions (e.g. 10, 100 1000 h at °C (1273 K) vacuum). analyses comprise (i) characterisation means three-point bending (damage tolerance), Charpy tests (total elongation fracture) as well (ii) in-depth microstructure scanning electron microscopy (SEM), transmission (TEM), Auger spectroscopy (AES). W-Cu (60 vol% W) show 15.5% total test room temperature. Furthermore, BDT occurs temperature several hundreds Kelvin lower than pure counterparts. Finally, present successful fabrication mm long W-Cu pipe its high heat flux performance. Fabrication studies components laminates, which are used either spreaders or structural pipes, presented.