Analysis of the kinetics of phase transitions in alloys with shape memory effect

2005 ◽  
Vol 43 (1) ◽  
pp. 125-130
Author(s):  
G. N. Kuvyrkin ◽  
I. S. Fedulova
Keyword(s):  
Phase Transitions ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Kinetics Of Phase Transitions ◽  
Kinetics Of

Phase transitions in intermetallic compounds Ni-Mn-Ga with shape memory effect

1999 ◽  
Vol 35 (5) ◽  
pp. 3811-3813 ◽  
Author(s):  
I. Dikshtein ◽  
V. Koledov ◽  
V. Shavrov ◽  
A. Tulaikova ◽  
A. Cherechukin ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Shape Memory ◽  
Intermetallic Compounds ◽  
Shape Memory Effect ◽  
Memory Effect

Influence of Low Temperature Glow Discharge Nitriding and/or Oxiding Process on Structure and Shape Memory Effect in NiTi Alloy

2013 ◽  
Vol 738-739 ◽  
pp. 344-347 ◽  
Author(s):  
Józef Lelątko ◽  
Zdzisław Lekston ◽  
Tadeusz Wierzchoń ◽  
Tomasz Goryczka
Keyword(s):  
Glow Discharge ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Niti Alloy ◽  
Deposition Process ◽  
Titanium Nitrides ◽  
Negative Effect ◽  
The One ◽  
Kinetics Of

In order to increase corrosion resistivity of the NiTi alloy the surface is covered by layers. Layers can be made from such as titanium nitrides and/or oxides as well as their mixture. Recently, a glow discharge technique has been applied for coatings formation. However, the deposition process requires to be done at elevated temperature. Therefore, it may have a negative effect on the structure, which is responsible for the shape memory phenomena. The results obtained from studies, done over the influence of the glow discharge nitriding and combination of nitriding and oxidizing process on the structure, the kinetics of martensitic transformation, the one-way shape memory effect and the superelasticity effect of the NiTi alloys are reported. The results showed that during deposition process, curried out at temperatures above 250°C and for time up to 30 minutes, the precipitation of dispersive particles of Ni4Ti3 phase already starts and has a positive effect on the superelasticity phenomena. The applied deposition technique does not affect also negatively the shape memory effect.

Phase transitions in compounds Ni/sub 2-x/Mn/sub 1-x/Ga with shape memory effect

1999 ◽  
Author(s):  
I.E. Dikshtein ◽  
V.V. Koledov ◽  
V.G. Shavrov ◽  
A.V. Tulaikova ◽  
A.A. Cherechukin ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect

Tensile Failure of 55-Nitinol Wire

1975 ◽  
Vol 33 ◽  
pp. 46-47
Author(s):  
F. I. Grace
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Stoichiometric Composition ◽  
Tensile Failure ◽  
Initial State ◽  
Initial Shape ◽  
Nitinol Wire ◽  
Cscl Type ◽  
Shear Transformation

An interest in NiTi alloys with near stoichiometric composition (55 NiTi) has intensified since they were found to exhibit a unique mechanical shape memory effect at the Naval Ordnance Laboratory some twelve years ago (thus refered to as NITINOL alloys). Since then, the microstructural mechanisms associated with the shape memory effect have been investigated and several interesting engineering applications have appeared.The shape memory effect implies that the alloy deformed from an initial shape will spontaneously return to that initial state upon heating. This behavior is reported to be related to a diffusionless shear transformation which takes place between similar but slightly different CsCl type structures.

A new type of intrinsic two-way shape-memory effect in hooks of NiTi-wires

2003 ◽  
Vol 112 ◽  
pp. 1177-1180 ◽  
Author(s):  
A. Schuster ◽  
H. F. Voggenreiter ◽  
D. C. Dunand ◽  
G. Eggeler
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
New Type ◽  
Niti Wires
Sign in / Sign up

Export Citation Format

Share Document