Internal friction and some other properties of shape memory Fe-Mn-Si based alloys

2003 ◽  
Vol 112 ◽  
pp. 397-400 ◽  
Author(s):  
P. G. Yakovenko ◽  
O. Söderberg ◽  
K. Ullakko ◽  
V. K. Lindroos
Keyword(s):  
Internal Friction ◽  
Shape Memory

Effect of Heat Treatments on the Damping Characteristics of TiNi-Based Shape Memory Alloys

2006 ◽  
Vol 319 ◽  
pp. 33-38 ◽  
Author(s):  
I. Yoshida ◽  
Kazuhiro Otsuka
Keyword(s):  
Internal Friction ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Low Frequency ◽  
Heat Treatments ◽  
Damping Capacity ◽  
Temperature Hysteresis ◽  
Temperature Spectrum ◽  
Two Peaks ◽  
Very High

Low frequency internal friction of Ti49Ni51 binary and Ti50Ni40Cu10 ternary shape memory alloys has been measured. The effect of solution and aging heat treatments on the damping property was examined. The temperature spectrum of internal friction for TiNi binary alloy consists, in general, of two peaks; one is a transition peak which is associated with the parent-martensite transformation and is rather unstable in a sense that it strongly depends on the frequency and decreases considerably when held at a constant temperature. The other one is a very high peak of the order of 10-2, which appears at around 200K. It appears both on cooling and on heating with no temperature hysteresis, and is very stable. The behavior of the peak is strongly influenced by the heat treatments. The trial of two-stage aging with a purpose of improving the damping capacity has been proved unsatisfactory. TiNiCu has a very high damping, the highest internal friction reaching 0.2, but by quenching from very high temperature, say 1373K, the damping is remarkably lowered. For the realization of high damping the quenching from a certain temperature range around 1173K seems the most preferable condition.

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.

scholarly journals Internal Friction and Young Modulus Behaviour of Hot-Rolled Cu-Al-Ni-Ti Shape Memory Alloys

1996 ◽  
Vol 06 (C8) ◽  
pp. C8-413-C8-416 ◽  
Author(s):  
E. Cesari ◽  
C. Seguí ◽  
J. Pons ◽  
F. Perelló
Keyword(s):  
Internal Friction ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Young Modulus ◽  
Hot Rolled

Internal friction of an Fe–28Mn–6Si–5Cr–0.5NbC shape memory alloy

2006 ◽  
Vol 438-440 ◽  
pp. 796-799 ◽  
Author(s):  
Takahiro Sawaguchi ◽  
Takehiko Kikuchi ◽  
Fuxing Yin ◽  
Setsuo Kajiwara
Keyword(s):  
Shape Memory Alloy ◽  
Internal Friction ◽  
Shape Memory

Internal friction in FeMnCrSiNi shape memory alloys

1994 ◽  
Vol 211-212 ◽  
pp. 212-215 ◽  
Author(s):  
R.B. Pérez-Sáez ◽  
M.L. Nó ◽  
J. San Juan
Keyword(s):  
Internal Friction ◽  
Shape Memory Alloys ◽  
Shape Memory

scholarly journals Magnetic Domain Walls and Macroscopic Magnetization-Related Elastic and Anelastic Effects during Premartensitic Transition in Ni2MnGa

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 376 ◽  
Author(s):  
Sergey Kustov ◽  
Jaume Rosselló ◽  
Miguel Lluís Corró ◽  
Vladimir Kaminskii ◽  
Konstantin Sapozhnikov ◽  
...  
Keyword(s):  
High Resolution ◽  
Shape Memory Alloy ◽  
Internal Friction ◽  
Shape Memory ◽  
Transformation Temperature ◽  
Domain Walls ◽  
Magnetic Domain ◽  
Magnetic Domain Walls

The temperature and field dependences of internal friction and Young´s modulus are studied using a high-resolution ultrasonic (90 kHz) technique in stoichiometric ferromagnetic Ni2MnGa shape memory alloy close to the premartensitic transformation temperature, TPM, in the demagnetized state and under moderate fields. Several new effects observed like an apparent Young´s modulus softening close to TPM under moderate fields, instead of the hardening outside this range, as well as existing controversies in the apparent elastic and anelastic properties of Ni2MnGa close to TPM are explained by microeddy and macroeddy current relaxations that to date have been disregarded.

Internal Friction and Microdeformation on Cu-Al-Ni Shape Memory Alloys

1993 ◽  
Vol 119-121 ◽  
pp. 323-330
Author(s):  
Vicente Recarte ◽  
J. Herreros ◽  
M.L. Nó ◽  
José San Juan
Keyword(s):  
Internal Friction ◽  
Shape Memory Alloys ◽  
Shape Memory
Sign in / Sign up

Export Citation Format

Share Document