Preparation by Twin Roll Casting and Characterization of TiNi Shape Memory Alloys Strips

2007 ◽  
pp. 121-126
Author(s):  
Richard Portier ◽  
Philippe Vermaut ◽  
P. Ochin ◽  
Tomasz Goryczka ◽  
Jorge Malarría
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Twin Roll

Preparation by Twin Roll Casting and Characterization of TiNi Shape Memory Alloys Strips

2007 ◽  
Vol 130 ◽  
pp. 121-126 ◽  
Author(s):  
Richard Portier ◽  
Philippe Vermaut ◽  
Patrick Ochin ◽  
Tomasz Goryczka ◽  
Jorge Malarría
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Functional Properties ◽  
Plane Surface ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
High Transformation ◽  
Production Technologies ◽  
Twin Roll

The thermoelastic martensitic transformation which gives remarkable functional properties to Shape Memory Alloys (SMA) is very sensitive to the chemistry of the alloys and to its microstructure. In many cases, especially for alloys with high transformation temperatures, applications are limited by the poor ductility. To overcome the brittleness of SMA, one approach can be effective : the development of non conventional production technologies which enable to obtain materials in forms close to requirements: strips of SMA have been prepared by Twin Roll Casting (TRC). The formation of a solid sheet with plane surface is only possible for a limited combination of the different machine parameters and they will be discussed. For comprehension of the process parameters effect, the attention will be focused on TiNi. Microstructures and functional properties will be examined in relation with the microstructures induced by the technique or after specific thermal treatment.

Texture in NiTi-Based Shape Memory Alloys Produced by Twin Roll Casting

2013 ◽  
Vol 203-204 ◽  
pp. 101-104 ◽  
Author(s):  
Tomasz Goryczka ◽  
Patrick Ochin
Keyword(s):  
Chemical Composition ◽  
Heat Flow ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Cross Section ◽  
Solidification Rate ◽  
Casting Technique ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Twin Roll

Two shape memory alloys with nominal chemical composition: Ni50Ti50 and Ni47Ti50Co3 were produced using twin roll casting technique (TRC). Relatively high cooling rate realized during solidification causes directional heat flow. In result of that, high textured strips were produced. However, the total amount of the preferentially oriented grains differs between surface and cross-section of the strip. At surface, where the crystallization of the grains is the most intensive amount of the grains can reach about 77%. At the cross-section of both strips, where the solidification rate decreased, the total amount of the textured grains was not higher than 57%.

scholarly journals Production of shape memory thin strips by twin roll casting technique

2001 ◽  
Vol 11 (PR8) ◽  
pp. Pr8-463-Pr8-468 ◽  
Author(s):  
F. Dalle ◽  
C. Elgoyhen ◽  
G. Despert ◽  
J. Malaria ◽  
R. Portier ◽  
...  
Keyword(s):  
Shape Memory ◽  
Casting Technique ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Twin Roll

Thermal and Microstructural Characterization of NiTi Thin Strips Produced by Twin-Roll Casting

2002 ◽  
Vol 394-395 ◽  
pp. 483-486 ◽  
Author(s):  
Philippe Vermaut ◽  
Patrick Ochin ◽  
A. Dezellus ◽  
Ph. Plaindoux ◽  
F. Dalle ◽  
...  
Keyword(s):  
Microstructural Characterization ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Twin Roll

Shape memory thin strips produced by the twin roll casting technique

2003 ◽  
Vol 112 ◽  
pp. 881-884 ◽  
Author(s):  
P. Ochin ◽  
A. Dezellus ◽  
Ph. Plaindoux ◽  
Ph. Vermaut ◽  
F. Dalle ◽  
...  
Keyword(s):  
Shape Memory ◽  
Casting Technique ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Twin Roll

Ni49.8Ti42.2Hf8 shape memory alloy strips production by the twin roll casting technique

2003 ◽  
Vol 346 (1-2) ◽  
pp. 320-327 ◽  
Author(s):  
F Dalle ◽  
G Despert ◽  
Ph Vermaut ◽  
R Portier ◽  
A Dezellus ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Casting Technique ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Twin Roll

Texture in Cu-based shape memory strips obtained by twin roll casting

2008 ◽  
Vol 481-482 ◽  
pp. 688-692 ◽  
Author(s):  
C. Sobrero ◽  
R. Bolmaro ◽  
J. Malarría ◽  
P. Ochin ◽  
R. Portier
Keyword(s):  
Shape Memory ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Twin Roll
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