J. Phys. IV France 07 (1997) C5-293-C5-297
Precipitation Process in a Deformed NiTi Near Equiatomic AlloyD. Stróz
Institute of Physics and Chemistry of Metals, University of Silesia, Katowice, Poland
The precipitation process in deformed NiTi alloys was studied in the work. The alloys had a nominal composition of 50.6 at.% and 51.0 at% of nickel. Specimens were deformed by 5 - 10 % and then aged at the temperature range 400 - 600°C. Electron microscopy studies showed that dislocations presence influence the precipitation process. This is especiaily visible in the Ni50.6%-Ti alloy were the particles nucleate at dislocations only. Ageing at 600°C causes healing out the dislocation and the precipitates do not occur in the alloy. Also in the alloy with larger content of nickel interaction between dislocations and precipitates is observed.
© EDP Sciences 1997