In situ observations of the reverse martensitic transformations in a TiNiHf high temperature shape memory alloy

1997 ◽  
Vol 30 (1) ◽  
pp. 23-28 ◽  
Author(s):  
X.D. Han ◽  
R. Wang ◽  
Z. Zhang ◽  
D.Z. Yang
Keyword(s):  
High Temperature ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Martensitic Transformations ◽  
In Situ Observations

scholarly journals Elevated Temperature, In Situ Micromechanical Characterization of a High Temperature Ternary Shape Memory Alloy

JOM ◽  
2015 ◽  
Vol 67 (12) ◽  
pp. 2908-2913 ◽  
Author(s):  
J. M. Wheeler ◽  
C. Niederberger ◽  
R. Raghavan ◽  
G. Thompson ◽  
M. Weaver ◽  
...  
Keyword(s):  
High Temperature ◽  
Elevated Temperature ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Micromechanical Characterization

Unexpected Constrained Twin Hierarchy in Equiatomic Ru-Based High Temperature Shape Memory Alloy Martensite

2013 ◽  
Vol 738-739 ◽  
pp. 195-199 ◽  
Author(s):  
Philippe Vermaut ◽  
Anna Manzoni ◽  
Anne Denquin ◽  
Frédéric Prima ◽  
Richard Portier
Keyword(s):  
High Temperature ◽  
Martensitic Transformation ◽  
Shape Memory Alloy ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Martensitic Transformations ◽  
Single Transition

Among the different systems for high temperature shape memory alloys (SMA’s), equiatomic RuNb and RuTa alloys demonstrate both shape memory effect (SME) and MT temperatures above 800°C. Equiatomic compounds undergo two successive martensitic transformations, β (B2) → β’ (tetragonal) → β’’ (monoclinic), whereas out of stoechiometry alloys exhibit a single transition from cubic to tetragonal. In the case of two successive martensitic transformations, we expect to have a finer microstructure of the second martensite because it is supposed to develop inside the smallest twin elements of the former one. In equiatomic Ru-based alloys, if the first martensitic transformation is “normal”, the second one gives different unexpected microstructures with, for instance, twins with a thickness which is larger than the smallest spacing between twin variants of the first martensite. In fact, the reason for this unexpected hierarchy of the twins size is that the second martensitic transformation takes place in special conditions: geometrically, elastically and crystallographically constrained.

scholarly journals High-energy synchrotron radiation X-ray diffraction measurements during in situ aging of a NiTi-15 at. % Hf high temperature shape memory alloy

Materialia ◽  
2019 ◽  
Vol 5 ◽  
pp. 100220 ◽  
Author(s):  
Matthew Carl ◽  
Jesse Smith ◽  
Robert W. Wheeler ◽  
Yang Ren ◽  
Brian Van Doren ◽  
...  
Keyword(s):  
High Temperature ◽  
Synchrotron Radiation ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
High Energy ◽  
X Ray Diffraction ◽  
X Ray

In Situ High Temperature Texture Characterisation in NiTi Shape Memory Alloy Using Synchrotron Radiation

2005 ◽  
pp. 125-130
Author(s):  
Andersan S. Paula ◽  
Karimbi K. Mahesh ◽  
Francisco Manuel Braz Fernandes ◽  
Rui Miguel S. Martins ◽  
A.M.A. Cardoso ◽  
...  
Keyword(s):  
High Temperature ◽  
Synchrotron Radiation ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Niti Shape Memory Alloy

Martensitic transformations and kinetics in Ti-Ni-Cu-Hf shape memory alloy

2021 ◽  
pp. 129732
Author(s):  
Jun Li ◽  
Kuishan Sun ◽  
Yuqi Jiang ◽  
Xianglong Meng ◽  
Wei Cai
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Martensitic Transformations
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