Thermal stability of dual-phase Ni58Mn25Ga17 high-temperature shape memory alloy

2010 ◽  
Vol 63 (1) ◽  
pp. 35-38 ◽  
Author(s):  
Yan Xin ◽  
Yan Li ◽  
Zongde Liu
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Dual Phase ◽  
Thermal Stability Of

Thermal stability of Ni54Mn25Ga20.9Gd0.1 high-temperature shape memory alloy with large reversible strain

2014 ◽  
Vol 123 ◽  
pp. 250-253 ◽  
Author(s):  
Xin Zhang ◽  
Jiehe Sui ◽  
Zheyi Yang ◽  
Xiaohang Zheng ◽  
Wei Cai
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Reversible Strain ◽  
Thermal Stability Of

Phase transformations of severely plastically deformed Ti–Ni–Pd high-temperature shape memory alloys

2017 ◽  
Vol 10 (01) ◽  
pp. 1740012 ◽  
Author(s):  
Semir Tulić ◽  
Michael Kerber ◽  
Mitsuhiro Matsuda ◽  
Thomas Waitz
Keyword(s):  
Thermal Stability ◽  
Plastic Deformation ◽  
High Temperature ◽  
Martensitic Transformation ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Amorphous Phase ◽  
Ultrafine Grained ◽  
Small Grains ◽  
Thermal Stability Of

Severe plastic deformation of a Ti[Formula: see text]Ni[Formula: see text]Pd[Formula: see text] high-temperature shape memory alloy yields a nanoscale mixture of an amorphous phase and retained lamellae of the parent B19 martensite. The thermal stability of the deformed martensite is significantly enhanced. Upon heating, B2 austenite occurs within the martensite and by crystallization of the amorphous phase, concomitant with recovery and the formation of an ultrafine grained structure. In the small grains, the B2 austenite to B19 martensitic transformation is shifted to lower temperatures and incomplete.

Thermodynamic analysis of the effect of annealing on the thermal stability of a Cu–Al–Ni–Mn shape memory alloy

2015 ◽  
Vol 608 ◽  
pp. 1-6 ◽  
Author(s):  
E.M. Mazzer ◽  
C.S. Kiminami ◽  
C. Bolfarini ◽  
R.D. Cava ◽  
W.J. Botta ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Thermodynamic Analysis ◽  
Thermal Stability Of

scholarly journals Thermal Stability of Beta Phase in a Cu-Al-Be Shape Memory Alloy

1995 ◽  
Vol 05 (C2) ◽  
pp. C2-171-C2-174 ◽  
Author(s):  
H. Flores Zúñiga ◽  
D. Rios-Jara ◽  
F. C. Lovey ◽  
G. Guénin
Keyword(s):  
Thermal Stability ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Beta Phase ◽  
Thermal Stability Of

Influence of Cu addition on transformation temperatures and thermal stability of TiNiPd high temperature shape memory alloys

2017 ◽  
Vol 233 (5) ◽  
pp. 800-808
Author(s):  
Saif ur Rehman ◽  
Mushtaq Khan ◽  
A Nusair Khan ◽  
Khurshid Alam ◽  
Syed Husain Imran Jaffery ◽  
...  
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Shape Memory Alloys ◽  
Thermal Cycling ◽  
Shape Memory ◽  
Thermal Hysteresis ◽  
Transformation Temperatures ◽  
Cu Content ◽  
Positive Effect ◽  
Thermal Stability Of

In this research, four high temperature shape memory alloys, Ti50Ni25-xPd25Cux (x = 0, 5, 10 and 15) were developed and designated 0Cu, 5 Cu, 10 Cu, and 15Cu, respectively. The effect of 5%, 10%, and 15% (all in atomic percent) Cu addition was investigated through their microstructure analysis, transformation temperatures and thermal stability. After the alloying of Cu content in their desired percentage, the alloys were named as 0Cu, 5Cu, 10Cu and 15Cu alloys. The martensite onset temperature Ms of ternary 0Cu alloy increased by 12.5 ℃, 27.5 ℃ and 60.5 ℃, respectively, by replacement of Ni with 5%, 10% and 15% Cu. Similarly, the austenite finish temperature Af increased by 11 ℃, 25 ℃, and 52 ℃, respectively. At the same time, thermal hysteresis of the 5Cu, 10Cu, and 15Cu alloys decreased by 1.5 ℃, 2.5 ℃, and 8.5 ℃, respectively, as compared to 0Cu alloy. The thermal stability of ternary 0Cu alloy was improved by replacing Ni with Cu. During thermal cycling, the net drop in Ms and Af of 0Cu alloy was 7.5 ℃ and 14 ℃, respectively. By replacing Ni with 5%, 10%, and 15% Cu, the net drop in Ms decreased to 5 ℃, 3.7 ℃, and 3 ℃, respectively, whereas the net drop in Af decreased to 10 ℃, 8.7 ℃, and 5 ℃. The overall results suggested that by the addition of 5%, 10%, and 15% Cu in place of Ni in TiNiPd alloys, the transformation temperatures and thermal stability improved. At the same time, thermal hysteresis decreased to a reasonable level which has a positive effect on the actuation behavior.

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