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Title of Journal: Rare Metals

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Abbravation: Rare Metals

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University of Science and Technology Beijing

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1867-7185

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Influence of temperature rate on transitory intern

Authors: Yonghua Li Guangxia Qi Zhongtang Wang Yuhai Li Ziyu Deng
Publish Date: 2010/05/21
Volume: 29, Issue: 3, Pages: 308-311
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Abstract

Internal friction IF spectra during reverse martensitic transformation from 35 to 135°C at different temperature rates of 05 075 and 1°C/min for Ti50Ni27Cu23 shape memory alloy SMA samples were measured with a dynamic mechanical analyzer respectively The IF spectra were characterized by IF peak increasing progressively and peak shifting toward high temperature with an increase in temperature rate An iterative approach was used to calculate the precise intrinsic and approximate transitory IF contributions to the normal IF spectrum The quantitatively analyzed results indicate that the transitory IF of this alloy is nonlinearly dependent on the temperature rate and obeys a power law with a power coefficient of 055 The predicted and experimental IF spectra at different temperature rates of 075 and 1°C/min agree well with each other respectively

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