Superelasticity of Single Crystalline Fe-30.8 at.%Pd Alloy

Fei Xiao; Kaname Yashima; Takashi Fukuda; Tomoyuki Kakeshita

doi:10.4028/www.scientific.net/MSF.738-739.33

Paper Titles

Stress-Free Strains in Martensitic Microstructures
p.10

Phase Stability at Martensitic Transformation in Zr-Based Shape Memory Intermetallics
p.15

About the Mechanism of Deformation at Martensite Transformation in the Fe-31 wt%Ni Alloy
p.20

Effect of Titanium Carbide Inclusions on Morphology of Low-Carbon Steel Martensite
p.25

Superelasticity of Single Crystalline Fe-30.8 at.%Pd Alloy
p.33

Effect of Partial Thermal Cycles on Non-Chemical Free Energy Contributions in Polycrystalline Cu-Al-Be Shape Memory Alloy
p.38

Calorimetric Study of Avalanche Criticality in the Martensitic Phase Transition of Cu_67.64Zn_16.71Al_15.65
p.46

Reactive Stresses and Burst Character of Shape Memory Deformation in Single Crystals Cu-Al-Ni and Ni-Fe-Ga Single Crystals
p.51

Electric Resistivity as Phase Volume Fractions Indicator in Metastable Alloys
p.56

HomeMaterials Science ForumMaterials Science Forum Vols. 738-739Superelasticity of Single Crystalline Fe-30.8...

Superelasticity of Single Crystalline Fe-30.8 at.%Pd Alloy

Abstract:

We have investigated superelastic behavior of an Fe-30.8Pd (at.%) alloy. This alloy transforms from a FCC parent phase to a FCT martensite phase at 255 K with a latent heat of 38 J/mol. When a compressive stress is applied in the [001] direction above the transformation temperature, the specimen exhibits a large elastic-like strain of more than 3% under relatively small stress of 100 MPa. The large elastic-like strain mainly comes from the elastic strain of the parent and martensite phases. The transformation strain also contributes to the strain, but it decreases linearly with increasing temperature and stress. The transformation strain || is extrapolated to be about 1.4 % under zero stress, and 0 % under 100 MPa. Probably a critical point, at which first order nature of the transformation disappears, exists for the FCC to FCT transformation in Fe-Pd alloys.