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一、前言 金属断口定量分析研究工作是断裂物理方面十分重要的研究方向之一。金属弯曲疲劳断口的瞬时破断区的几何对称性(相对于整个断口的几何中心)则是定量研究疲劳断口的重要内容。本文以超高强度钢30CrMnSiNi2A双向弯曲疲劳断口和高强度钢30CrMnSiA旋转弯曲疲劳断口为对象,对其瞬断区的不对称原因和影响因素进行了分
I. Introduction The quantitative analysis of metal fracture is one of the most important research directions in fracture physics. The geometric symmetry (relative to the geometric center of the entire fracture) of the instantaneous fracture zone of metal bending fatigue fracture is an important part of the quantitative study of fatigue fracture. In this paper, 30CrMnSiNi2A ultra-high strength steel with two-way bending fatigue fracture and high-strength steel 30CrMnSiA rotational bending fatigue fracture as the object, its instantaneous area asymmetry causes and influencing factors were divided