Influence of temperature and strain on the amplitude-dependent internal friction of high-purity aluminum
Influence of temperature and strain on the amplitude-dependent internal friction of high-purity aluminum
复制标题
温度和应变对高纯铝幅值相关内耗的影响
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
W. Robinson
中科院分区：
文献类型：
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作者：
S. Golyandin;K. Sapozhnikov;Yu. A. Emel’yanov;A. Sinani;S. Nikanorov;S. Kustov;W. Robinson
研究了高纯（99.999%）多晶铝在退火和变形（准静态、冲击和超声加载）状态下，在7- 300 K温度范围内，振动应变幅为10−7-10−4时的位错振幅相关摩擦（ADIF）。ADIF在指定的温度和振幅范围内是一个多级效应。ADIF的振幅-温度谱的分析允许分离的组件归因于：位错之间的相互作用，位错与钉扎点的相互作用，和纯位错弛豫（与Peierls救济位错的相互作用）。观察到ADIF非单调地依赖于由应变硬化和恢复过程确定的初始准静态应变。
The dislocation amplitude-dependent friction (ADIF) of high-purity (99.999%) polycrystalline aluminum is investigated in the temperature range 7–300K at vibrational strain amplitudes of 10−7–10−4 for samples in the annealed and deformed (by quasistatic, shock, and ultrasonic loading) states. The ADIF is a multistage effect in the indicated temperature and vibration amplitude ranges. Analysis of the amplitude-temperature spectra of the ADIF permits separation of components attributable to: interaction between dislocations, the interaction of dislocations with pinning points, and pure dislocation relaxation (the interaction of dislocations with the Peierls relief). ADIF is observed to depend nonmonotonically on the initial quasistatic strain determined by strain hardening and recovery processes.