scholarly journals Internal Friction in Two-Stage Martensitic Transformation of Ni-Ti Alloy

1996 ◽  
Vol 06 (C8) ◽  
pp. C8-417-C8-420 ◽  
Author(s):  
J. Ilczuk ◽  
H. Morawiec
Keyword(s):  
Martensitic Transformation ◽  
Internal Friction ◽  
Ti Alloy ◽  
Two Stage

scholarly journals The Effect of Subsequent Stress-Induced Martensite Aging on the Viscoelastic Properties of Aged NiTiHf Polycrystals

Metals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1890
Author(s):  
Anton I. Tagiltsev ◽  
Elena Y. Panchenko ◽  
Ekaterina E. Timofeeva ◽  
Yuriy I. Chumlyakov ◽  
Ekaterina S. Marchenko ◽  
...  
Keyword(s):  
Elastic Modulus ◽  
Martensitic Transformation ◽  
Internal Friction ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Viscoelastic Properties ◽  
Oriented Growth ◽  
Compressive Stresses ◽  
Significant Change

This study investigated the effect of stress-induced martensite aging under tensile and compressive stresses on the functional and viscoelastic properties in Ni50.3Ti32.2Hf17.5 polycrystals containing dispersed H-phase particles up to 70 nm in size obtained by preliminary austenite aging at 873 K for 3 h. It was found that stress-induced martensite aging at 428 K for 12 h results in the appearance of a two-way shape memory effect of −0.5% in compression and +1.8% in tension. Moreover, a significant change in viscoelastic properties can be observed: an increase in internal friction (by 25%) and a change in elastic modulus in tensile samples. The increase in internal friction during martensitic transformation after stress-induced martensite aging is associated with the oriented growth of thermal-induced martensite. After stress-induced martensite aging, the elastic modulus of martensite (EM) increased by 8 GPa, and the elastic modulus of austenite (EA) decreased by 8 GPa. It was shown that stress-induced martensite aging strongly affects the functional and viscoelastic properties of material and can be used to control them.

Studies on Dynamic Elastic and Internal Friction Properties of Cu-Cr-Zr-Ti Alloy Between 25 and 650 °C

2015 ◽  
Vol 24 (12) ◽  
pp. 4721-4727 ◽  
Author(s):  
K. Saravanan ◽  
V. M. J. Sharma ◽  
A. K. Asraff ◽  
P. Ramesh Narayanan ◽  
S. C. Sharma ◽  
...  
Keyword(s):  
Internal Friction ◽  
Ti Alloy

Martensitic transformation and giant magneto-functional properties in all-d-metal Ni-Co-Mn-Ti alloy ribbons

2019 ◽  
Vol 790 ◽  
pp. 78-92 ◽  
Author(s):  
Kai Liu ◽  
Shengcan Ma ◽  
Chicheng Ma ◽  
Xingqi Han ◽  
Kun Yu ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Functional Properties ◽  
Ti Alloy

scholarly journals Some Observations of Ausageing Effects on the Martensitic Transformation in an Fe–Ni–Ti Alloy

1984 ◽  
Vol 25 (2) ◽  
pp. 80-88 ◽  
Author(s):  
Tsugio Tadaki ◽  
Kyoichiro Asayama ◽  
Ken’ichi Shimizu
Keyword(s):  
Martensitic Transformation ◽  
Ti Alloy

Mechanical Spectroscopy of Hyperstabilized Martensites

2012 ◽  
Vol 184 ◽  
pp. 355-360 ◽  
Author(s):  
Sergey Kustov ◽  
R. Santamarta ◽  
E. Cesari ◽  
K. Sapozhnikov ◽  
V. Nikolaev ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Internal Friction ◽  
Essential Role ◽  
Parent Phase ◽  
Martensitic Transformation Temperature ◽  
Mechanical Spectroscopy ◽  
Internal Friction Peak ◽  
Pinning Effect ◽  
The One

The internal friction of the hyperstabilized martensite demonstrates very low values, both above and below the nominal martensitic transformation temperature, due to a pronounced pinning effect. Over a wide temperature range it is comparable with the level of damping in the parent phase. A study of the temperature dependence of the non-linear ultrasonic internal friction and its strain amplitude hysteresis indicates that the diffusion, assisted by dislocations/interfaces, is quite pronounced and in Ni-Fe-Ga and Cu-Al-Be alloys it operates at temperatures around 20 K. The renucleation of the lamellar parent phase during the reverse martensitic transformation close to 600 K is accompanied by an internal friction peak which demonstrates a substantial transitory contribution. After renucleation of the parent phase the samples recover a conventional martensitic transformation with the internal friction level in the martensite comparable to the one in non-stabilized samples. Observations of a relaxation peak in the parent phase of different alloys for temperatures just below the renucleation stage of the reverse transformation point to the essential role of diffusion in the nucleation of the parent phase in hyperstabilized martensites.

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