Abstract

Formation of macrolocalized deformation bands under conditions of serrated creep is studied by methods of acoustic emission (AE) and high-speed video recording. It is established that the fastest stages of the deformation band formation, which are related to the emergence of a band on the surface with subsequent accelerated expansion, are accompanied by generating a burst of an AE signal in the band of ∼0.05–1 MHz. Hidden correlations in the complex structure of the acoustic burst were studied by methods of statistical and fractal analysis. The relation between the acoustic burst envelope and variation rate of the force response caused by the formation of an individual deformation band is established.

中文翻译：

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研究铝镁合金间断蠕变过程中的高频声发射

摘要

通过声发射（AE）和高速视频记录的方法研究了在锯齿状蠕变条件下宏观局部变形带的形成。可以确定的是，形变能带形成的最快阶段与表面上能带的出现以及随后的加速扩展有关，在约0.05-1 MHz的能带中会产生AE信号突发。通过统计和分形分析方法研究了声脉冲的复杂结构中的隐藏相关性。建立了声爆包络和由单个变形带的形成引起的力响应的变化率之间的关系。