کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1449919 | 988717 | 2007 | 9 صفحه PDF | دانلود رایگان |

The conventionally produced Ti50Ni50−xCux shape memory alloys with Cu-content exceeding 12 at.% have been reported to be brittle. The authors have recently reported that, after being properly annealed, the Ti50Ni25Cu25 melt-spun ribbon exhibits excellent superelasticity and shape memory effect. The present research aims to elucidate why these beneficial properties come about by investigating the evolution of microstructures and textures as a function of the annealing condition. It is found that annealing at 500 °C and above results in the formation of a strong (111)[7¯15]B19 sheet texture that is favorable to martensite detwinning, while with annealing at 550 °C and above the formation of B11 precipitates becomes significant. These two factors are believed to play key roles in determining the properties of the ribbon.
Journal: Acta Materialia - Volume 55, Issue 1, January 2007, Pages 361–369