The damping behavior of a Ni-50 at.%Ti shape memory alloy
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Fuxing Yin
Abstract
In order to utilize the shape memory alloys (SMAs) for prospective damping applications, a near equiatomic NiTi alloy was investigated on a dynamic mechanical analyzer in the infrasonic frequency range. A high damping capacity stable to the variation of temperature can be obtained during a two-stage phase transformation and in the martensite state approaching to the martensite-parent phase transformation temperature in the NiTi SMA. The transient damping peaks associated with the phase transformation in the NiTi SMA shows a strong frequency dependence in both solutionized and annealed specimens. The frequency dependence parameter, n, was found to be in the range 0.3 – 0.6. For the applied strain amplitudes from 8.5 × 10–6 to 5.0 × 10 –5 a clear strain amplitude dependence was not observed in the damping peaks, except for the solutionized specimens. While the damping capacity of the martensite state, characterized at 300 K, showed obvious frequency dependences in both the solutionized and annealed specimens, only the annealed specimens manifested the strain amplitude dependence. The different damping behavior was attributed to the internal structure of martensite, including dislocations, the twinning types and variant interfaces, changeable with the prior thermomechanical treatments.
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© 2003 Carl Hanser Verlag, München
Articles in the same Issue
- Frontmatter
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- Influence of charged hydrogen on tensile behavior of a pressure vessel steel at relatively high temperatures
- The damping behavior of a Ni-50 at.%Ti shape memory alloy
- Development of SMD 32.768 kHz tuning fork-type crystals
- Investigation of the miscibility gap region in liquid Ga–Pb alloys
- Notifications/Mitteilungen
- Werner-Köster-Preis 2002
- Personal/Personelles
- Information
- Books/Bücher
- Conferences/Konferenzen
Articles in the same Issue
- Frontmatter
- Articles/Aufsätze
- Bulk and grain boundary diffusion of Ag in γ-FeNi alloy
- Thermodynamics of ordered intermetallic compounds containing point defects
- Relationship between the sodium oxide activity of ceramic (Na-β + β″)-alumina and the sodium activity in the ambience of the material
- Calorimetric study of MgZn2 and Mg2Zn11
- The (γ + γ′)/γ′ phase boundary in the Ni–Al phase diagram from 600 to 1200 °C
- Experimental investigation and thermodynamic calculation of ternary Al–Ca–Mg phase equilibria
- Texture development in Al alloys during tensile testing
- Dispersion strengthening of copper by internal oxidation of rapidly solidified Cu-RE alloys
- The effect of Cu and Al on the mechanical properties of gravity-cast hyper-eutectic Zn–Al-based alloys
- Hot deformation characteristics of Ti-6Al-4V
- Effect of carbon and nitrogen on the stacking fault energy of high-alloyed iron-based austenite
- Influence of charged hydrogen on tensile behavior of a pressure vessel steel at relatively high temperatures
- The damping behavior of a Ni-50 at.%Ti shape memory alloy
- Development of SMD 32.768 kHz tuning fork-type crystals
- Investigation of the miscibility gap region in liquid Ga–Pb alloys
- Notifications/Mitteilungen
- Werner-Köster-Preis 2002
- Personal/Personelles
- Information
- Books/Bücher
- Conferences/Konferenzen