High Damping Capacity of a Binary TiNi Shape Memory Alloy

Zhi Shan Yuan; Zhao Wei Feng; Wei Dong Miao; Jiang Bo Wang; Jin Zhou; Ming Zhu

doi:10.4028/www.scientific.net/MSF.687.485

Paper Titles

Defect Structure and Martensitic Transformation Crystallography in Ni₂MnGa Alloy
p.463

Deformation Behavior of Polycrystalline Fe-Ga-B Alloy at Elevated Temperature
p.467

Effect of Fe on Phase Transformation of Low Temperature Cu-Al-Mn Memory Alloy
p.474

Effect of Temperature on Critical Stress for Slip of Ti-Ni Shape Memory Alloy
p.480

High Damping Capacity of a Binary TiNi Shape Memory Alloy
p.485

Hysteresis Property of Stress-Strain Relation for Tb_0.3Dy_0.7Fe₂ <110> Oriented Polycrystal
p.490

Influence of Nb Addition on Phase Transformation of TiNiFe Shape Memory Alloy
p.494

Martensitic Transformation and Mechanical Properties of Fe-Doped Ni₅₄Mn₂₁Ga₂₅ Alloys
p.500

Martensitic Transformation and Metamagnetic Shape Memory Effect in Ni₄₆Co₄Mn₃₇in₁₃ Heusler Alloy
p.505

HomeMaterials Science ForumMaterials Science Forum Vol. 687High Damping Capacity of a Binary TiNi Shape...

High Damping Capacity of a Binary TiNi Shape Memory Alloy

Abstract:

TiNi shape memory alloys exhibiting high damping capacity are currently expected to be used as structural materials for energy dissipation or vibration control applications. In this paper, the characterization of damping behaviour of a binary TiNi SMA was performed by dynamic mechanical analyzer (DMA) instrument and differential scanning calorimetry (DSC) equipment. Damping tests measuring Tanδ, storage modulus E' and loss modulus E" of Ti49.2Ni50.8 binary shape memory alloy were investigated at different temperature, using different frequency and strain amplitude. It shows that quenching rate has a significant effect on the damping capacity of TiNi SMA by exhibiting different phase transformation behavior. Internal friction values (Q^-1) corresponding to cubic B2 parent phase to rhombohedral R phase transformation, B2-R, and R-B19' monoclinic martensite transformation are as high as 0.177 and 0.078, respectively. The occurrence of R-phase significantly softens the storage modulus and thus promotes the damping capacity of TiNi SMAs.