Acoustic study of dislocation rearrangement at later stages of fatigue: Noncontact prediction of remaining life
Acoustic study of dislocation rearrangement at later stages of fatigue: Noncontact prediction of remaining life
复制标题
疲劳后期位错重排的声学研究：剩余寿命的非接触预测
DOI：
10.1063/1.1433178
复制
发表时间：
2002
影响因子：
3.2
通讯作者：
M. Hirao
中科院分区：
文献类型：
--
作者：
H. Ogi;Yoshikiyo Minami;M. Hirao
本研究旨在阐明碳钢在旋转弯曲疲劳中观察到的表面剪切波衰减峰的机理。我们开发了电磁声共振，在整个疲劳试验过程中对衰减进行非接触监测。衰减峰值出现在寿命的固定比例，与弯曲应力（屈服应力的0.49-1.20）和碳含量（0.22-0.45质量%）无关。低温热处理使峰值衰减恢复到之前的值，这表明位错是主要因素。透射电镜显微结构观察、表面裂纹研究和声学测量表明，在衰减峰处，位错结构（持续的滑移带到细胞）发生了大规模的变化，这是由裂纹向内扩展引起的。这种变化在很短的时间内完成，仅占整个生命周期的几个百分点。acoustic-resonan……
This study is devoted to clarifying the mechanism of the surface-shear-wave attenuation peak observed during rotating bending fatigue of carbon steels. We have developed electromagnetic acoustic resonance to make a contactless monitoring of the attenuation throughout the fatigue test. The attenuation peak occurs at a fixed fraction to lifetime, being independent of the bending stress (0.49–1.20 of the yield stresses) and the carbon content (0.22–0.45 mass %). Low-temperature heat treatment reduces the peak attenuation back to the previous value, which indicates a dominant contribution of dislocations. Microstructure observations with transmission electron microscopy, surface crack study with replicas and the acoustic measurements show that a large-scale change occurs in the dislocation structure (persistent slip bands to cells) at the attenuation peak and that it is triggered by the inward growth of cracks. This change is completed in a short time, a few percent of the total lifetime. The acoustic-resonan...
DOI：
10.1007/978-0-387-92897-5_100470
发表时间：
1991
期刊：
--
影响因子：
--
作者：
S. Suresh
通讯作者：
S. Suresh