A Role of α′ Martensite Introduced by Thermo-Mechanical Treatment in Improving Shape Memory Effect of an Fe-Mn-Si-Cr-Ni Alloy

2011 ◽  
Vol 13 (5) ◽  
pp. 388-394 ◽  
Author(s):  
Huabei Peng ◽  
Yuhua Wen ◽  
Gang Liu ◽  
Chaoping Wang ◽  
Ning Li
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Mechanical Treatment ◽  
Ni Alloy ◽  
Thermo Mechanical Treatment

Comparative study on the effect of samarium additions on thermo-mechanical behaviour of shape memory alloys

2018 ◽  
Vol 106 (1) ◽  
pp. 106 ◽  
Author(s):  
Manvel Raj Thomas ◽  
Balaji Dhandabani ◽  
Chandran Velu
Keyword(s):  
Shape Memory ◽  
Strain Hardening ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Critical Stress ◽  
Mechanical Treatment ◽  
Strain Hardening Exponent ◽  
Stress And Strain ◽  
Proof Stress ◽  
Thermo Mechanical Treatment

In the present work, a comparative study of the shape memory and thermo-mechanical behaviour of four alloys containing different amount of samarium have been carried out at a strain rate of 0.08 × 10-6s-1. After hot rolling, annealing and solution treatment, the alloy samples were tensile deformed at room temperature from 1% to 5% and were then recovered at 600 °C for 20 minutes repeatedly for six times to complete six training cycles. It is found that thermo-mechanical treatment (training) results in improvement of shape memory effect and has a significant influence on mechanical parameters like proof stress (σ: 0.002), critical stress (σ: 0.0008) and strain hardening exponent. The improvement in shape memory effect by thermo-mechanical treatment can be regarded as the effect of reduction in the values of proof stress and critical stress during training which facilitates the formation of ε (martensite). It has also been noticed that excessive training may result in the formation of ά (martensite) due to continuous softening of the alloy during training, thus degrading the shape memory effect. Finally, it has also been noticed that the addition of samarium increases the values of proof stress, critical stress and strain hardening exponent. Although the addition of samarium increases the values of proof stress, critical stress and strain hardening exponent yet it has not an adverse effect on shape memory effect. In this paper, the effect of thermo-mechanical treatment on mechanical parameters such as proof stress, critical stress, strain hardening exponent and their influence on shape memory effect is discussed.

Effect of prestrain on two-way shape memory effect in Ti-Ni alloy

Ecomaterials ◽  
1994 ◽  
pp. 1097-1100 ◽  
Author(s):  
S. Miyazaki ◽  
M. Kimura ◽  
H. Horikawa
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Ni Alloy

A role of hydrogen in shape memory effect of Ti-Ni alloys

1990 ◽  
Vol 24 (6) ◽  
pp. 1051-1055 ◽  
Author(s):  
N. Wade ◽  
Y. Adachi ◽  
Y. Hosoi
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Ni Alloys

Effect of microstructure of austenite on the shape memory effect in an Fe-Mn-Si-Ni alloy

1997 ◽  
Vol 36 (7) ◽  
pp. 741-745 ◽  
Author(s):  
Y.Q. Wang ◽  
Z. Wang ◽  
J.H. Yang ◽  
L.C. Zhao
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Ni Alloy ◽  
Effect Of Microstructure

On the shape memory effect in a CuAlNi alloy

1972 ◽  
Vol 6 (9) ◽  
pp. 869-874 ◽  
Author(s):  
B. Sarma ◽  
K.K. Ray ◽  
V. Balasubramanian
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Ni Alloy

Shape memory effect in thin films of a Cu–Al–Ni alloy

2008 ◽  
Vol 481-482 ◽  
pp. 426-430 ◽  
Author(s):  
F.C. Lovey ◽  
A.M. Condó ◽  
J. Guimpel ◽  
M.J. Yacamán
Keyword(s):  
Thin Films ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Ni Alloy

scholarly journals Cyclic Characteristics of the Shape Memory Effect in Ti-Ni Alloy Wires and Helical Springs

1990 ◽  
Vol 33 (2) ◽  
pp. 256-262 ◽  
Author(s):  
Hisaaki TOBUSHI ◽  
Hiroyuki IWANAGA ◽  
Yoshio OHASHI ◽  
Akitoshi INABA ◽  
Minoru KAWAGUCHI ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Helical Springs ◽  
Ni Alloy
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