Number of the records: 1
Influence of precipitation and dislocation substructure on phase transformation temperatures in a Ni-rich NiTi-shape memory alloy
- 1.0177800 - UFM-A 20013323 RIV FR eng J - Journal Article
Allafi, J. K. - Dlouhý, Antonín - Neuking, K. - Eggeler, G.
Influence of precipitation and dislocation substructure on phase transformation temperatures in a Ni-rich NiTi-shape memory alloy.
Journal de Physique IV. Roč. 11, Pr8 (2001), s. 529-534. ISSN 1155-4339
R&D Projects: GA ČR GA106/99/1172
Institutional research plan: CEZ:AV0Z2041904
Keywords : phase transformation * creep * Ni-rich NiTi-shape memory alloy
Subject RIV: JG - Metallurgy
Impact factor: 0.401, year: 2001
The present work studies the influence of different thermo-mechanical treatments on phase transformation and creep of a Ti-50.7at%Ni shape memory alloy. Thermo-mechanically processed, solution annealed, tempered and pre-crept material states show different phase transformation behaviour. Precipitation of Ti3Ni4 particles can rationalize a 20°C increase in phase transition temperatures. Changes of dislocation density and subgrain size also have a systematic but small effect on the martensitic transformation. There is a strong influence of small preloads on the shape of individual creep curves in the early stages of creep which is associated with the precipitation of Ti3Ni4.
Permanent Link: http://hdl.handle.net/11104/0074707
Number of the records: 1