Abstract

Ultrasonic oscillations of spall plates with a frequency of several MHz occur in the form of a standing wave. The reverberation of the plate is related to the ultrasound category with sufficiently large amplitudes of the vibrations. The periodic change of the compression–tension cycles, characteristic for oscillation processes, leads to the localization of the plastic deformation at the nodes of a standing wave. The self-healing effect is a consequence of the localized strain process: the interstitial elements and ultrafine particles of the alloying phase migrate from the matrix material into the zone of increasing spall destruction. The metal microstructure in the localized strain bands (LSBs) consists of a strongly deformed structureless material containing cup-shaped damage foci, 1 to 3 µm in size, with a large number of micropores. Physical and chemical processes, such as fragmentation, dissolution of the alloying phase particles, and carbidization, are responsible for the formation of the microstructure in the localization bands.

中文翻译：

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隔板中的金属微观结构

摘要

频率为几兆赫兹的压裂板的超声波振荡以驻波的形式出现。板的混响与具有足够大的振动幅度的超声类别有关。压缩-拉伸周期的周期性变化（振荡过程的特征）导致塑性变形在驻波节点处定位。自愈效应是局部应变过程的结果：合金相的间隙元素和超细颗粒从基体材料迁移到剥落破坏加剧的区域。局部应变带（LSBs）中的金属微观结构由含有1个到3 µm大小的杯状损伤灶，大量微孔的强烈变形的无结构材料组成。