Taheriniya S, A. Davani, F, Hilke, S, Hepp M, Gadelmeier C, Chellali MR, Boll T, Rösner H, Peterlechner M, Gammer C, Divinski SV, Butz B, Glatzel U, Hahn H, Wilde G
Research article (journal)
High-pressure torsion was applied to join two disks of single-phase equiatomic fcc CoCrFeMnNi and bcc HfNbTaTiZr high entropy alloys (HEAs). After 15 revolutions a bulk nanocomposite had developed with alternating nano-lamellae of elongated nanocrystalline CoCrFeMnNi and mixed amorphous-nanocrystalline HfNbTaTiZr, exhibiting complex microstructures with numerous vortex-like regions. While the fcc phase retains a rather homogeneous elemental distribution, the former bcc high entropy alloy experiences a chemical separation towards Ta-rich and Ta-poor phases. The joining of dissimilar HEAs under constrained conditions (cold shut) enables the design of novel HEA-based composites by non-equilibrium processing.
Release year: 2021
Language in which the publication is written: English
Link to the full text: https://www.sciencedirect.com/science/article/abs/pii/S135964542100094X?via%3Dihub