Table 1 Material properties (NiTi)

E _A

Austenite Young Modulus

52650 MPa

ν _A

Austenite Poisson Ratio

0.33

E _M

Martensite Young Modulus

38250 MPa

ν _M

Martensite Poisson Ratio

0.33

ε _L

Maximum Transformation Strain

6%

${\sigma }_s^{AM}$

Transformation Activation Stress (A→M)

300 MPa

${\sigma }_c^{AM}$

Transformation Completion Stress (A→M)

340 MPa

${\sigma }_s^{MA}$

Transformation Activation Stress (M→A)

200 MPa

${\sigma }_c^{MA}$

Transformation Completion Stress (M→A)

180 MPa

T ₀

Reference Temperature

22°C

C ^AM

$\frac{\partial {\sigma }_{s,c}^{AM}}{\partial T}$

6.7 MPa/°C

C ^MA

$\frac{\partial {\sigma }_{s,c}^{MA}}{\partial T}$

6.7 MPa/°C