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Production of TiNi amorphous/nanocrystalline wires with high strength and elastic modulus by severe cold drawing
Ist Teil von
Scripta materialia, 2009-05, Vol.60 (9), p.749-752
Ort / Verlag
Elsevier Ltd
Erscheinungsjahr
2009
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
The microstructure and properties of Ti–50.9
mol.% Ni wires after severe cold drawing were studied. X-ray diffractometry, transmission electron microscopy and electrical resistivity measurements revealed that the amorphous phase was dominant in the as-drawn wires. Young’s modulus depended strongly on the drawing reduction. The amorphous/nanocrystalline wires after 70% reduction exhibit high tensile strength (>2
GPa), a high Young’s modulus (71
GPa) and a large pseudoelastic recovery strain (∼3%). The recovery strain was further improved to 5.8% by aging at 573
K.