The thickness of plastically deformed layer formed under the conditions of quasibrittle fracture as a result of propagation of a preliminarily formed fatigue crack is found as a result of X-ray investigations. We estimate the residual stresses of the second kind. By using these stresses, we compute the specific fracture energy. It is shown that the thickness of plastically deformed layer coincides with the height of asperities on the fracture surface.

中文翻译：

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基于新形成表面的 X 射线研究评估准脆性断裂的能量损失

X射线研究的结果是，由于初步形成的疲劳裂纹的扩展，在准脆性断裂条件下形成的塑性变形层的厚度。我们估计第二类残余应力。通过使用这些应力，我们计算了比断裂能。结果表明，塑性变形层的厚度与断裂面上的凹凸高度一致。