F Neves et al 2009 Smart Mater. Struct. 18 115003 doi:10.1088/0964-1726/18/11/115003
The transformation behaviour of bulk nanostructured NiTi alloys
F Neves1,2,7, F M Braz Fernandes1, I Martins2, J B Correia2, M Oliveira2, E Gaffet3, T-Y Wang4, M Lattemann5,6, J Suffner5,6 and H Hahn5,6
Show affiliationsThe phase transformation behaviour of bulk nanostructured NiTi shape memory alloys, produced by an innovative approach called MARES (mechanically activated reactive extrusion synthesis), was investigated using in situ x-ray diffraction and differential scanning calorimetry measurements. For the experimental conditions used, a suitable adjustment of the NiTi matrix composition was achieved after ageing at 500 °C for 7 h. The aged materials showed a homogeneous dispersion of Ni4Ti3 precipitates embedded in a B2-NiTi matrix. Under this condition the B2-NiTi matrix has undergone a 
two-stage phase transformation. This was attributed to the complex microstructural evolution during MARES processing, i.e. formation of large-scale and small-scale heterogeneities. Transmission electron microscopy investigations of the solution-treated materials showed the existence of equiaxed nanocrystals in the nanocrystalline NiTi matrix.
- PACS
-
64.70.Nd Structural transitions in nanoscale materials
81.30.Kf Martensitic transformations
81.30.Mh Solid-phase precipitation
- Subjects
- Dates
-
Issue 11 (November 2009)
Received 22 April 2009, in final form 16 July 2009
Published 11 September 2009
-
The transformation behaviour of bulk nanostructured NiTi alloys
F Neves et al 2009 Smart Mater. Struct. 18 115003
-
The coherent state on SUq(2) homogeneous space
N Aizawa and R Chakrabarti 2009 J. Phys. A: Math. Theor. 42 295208
-
Analogies between a Meniscus and a Cantilever
Liu Jian-Lin 2009 Chinese Phys. Lett. 26 116803
-
Initial two-gluon correlations in nucleus–nucleus collisions
F Gelis 2008 J. Phys. G: Nucl. Part. Phys. 35 104050
-
Magnetic fungal colonies on silicon: a nanoscale diffusion process and evidence of thermal capillary waves
Deeder Aurongzeb and Latika Menon 2007 Nanotechnology 18 505102
-
Microgrippers: a case study for batch-compatible integration of MEMS with nanostructures
O Sardan et al 2007 Nanotechnology 18 375501
-
Fabrication and performance characteristics of high-frequency micromachined bulk acoustic wave quartz resonator arrays
Ping Kao et al 2009 Meas. Sci. Technol. 20 124007
-
A fatigue test method for Pb(Zr,Ti)O3 thin films by using MEMS-based self-sensitive piezoelectric microcantilevers
T Kobayashi et al 2008 J. Micromech. Microeng. 18 115007
-
The fabrication of short metallic nanotubes by templated electrodeposition
Chienwen Huang and Yaowu Hao 2009 Nanotechnology 20 445607
-
Spindle checkpoint regulated by nonequilibrium collective spindle-chromosome interaction; relationship to single DNA molecule force-extension formula
Leif Matsson 2009 J. Phys.: Condens. Matter 21 502101
Users also read
What's this?- Characterization of thermally evaporated thin films of Rhodamine 6G
- The transient behavior of electrorheological fluid in tensile flow
- Two-way shape memory effect induced by repetitive compressive loading cycles
Related review articles
What's this?- Integrable structure of box–ball systems: crystal, Bethe ansatz, ultradiscretization and tropical geometry
- Processes involving clusters and small particles in a buffer gas
- Dynamic model of supersonic martensitic crystal growth