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热弹性马氏体相变中的高温内耗峰

High-Temperature Internal Friction Peak in Thermoelastic Martensitic Transformation
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摘要 采用不完全相变内耗(IF)测量法,在Cu-Al-Ni-Mn-Ti合金马氏体相变中获得双内耗峰,即低温内耗峰和高温内耗峰。高温内耗峰主要出现在频率小于0.050 Hz的范围,其位置对应于相对动力学模量的拐点位置;高温内耗峰峰值在测量频率范围内与振动频率成反比关系,满足经典的Belko和Delorme模型;高温内耗峰具有明显的反常应变振幅效应,其峰值随变温速率的增大而增大,这些都说明高温内耗峰的形成与相转变量有关。 Two internal friction (IF) peaks, the lowtemperature IF peak and the high-temperature IF peak, were obtained in martensitic transformation of Cu-Al-Ni-Mn-Ti alloy through partial phase transition method. The high-temperature IF peak primarily appeared where the frequency was less than 0. 050 Hz and it corresponded to the inflexion point of relative dynamic modulus. The maximum of the high-temperature IF peak was inversely proportional to the frequency within the measuring frequencies, which was in accordance with the classical models of Belko and Delorme. The high temperature peak had a clear abnormal effect on strain amplitude, and its maximum increased with the increase of heating rate, which all suggested that it corresponded to the value of phase transformation.
出处 《稀有金属》 EI CAS CSCD 北大核心 2009年第6期795-798,共4页 Chinese Journal of Rare Metals
基金 安徽省自然科学基金(070414202) 安徽省高校优秀青年人才基金(2009SQRZ022ZD)资助项目
关键词 热弹性马氏体 内耗 高温内耗峰 thermoelastic martensite internal friction the high-temperature IF peak
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