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Abstract：
A comparative analysis of fracture mechanisms in high- and very high- cycle fatigue (HCF, VHCF) regimes was carried out based on the results of multifractal analysis of the fracture surfaces of additively manufactured 316L stainless steel samples. In terms of scale invariants, the morphology of fracture surfaces in HCF and VHCF regimes inside and outside the fine granular area is shown. The analysis demonstrated that chaotic patterns of relief formation prevail in the crack initiation zone of VHCF samples. However, there is a self-similar relief with a pronounced correlation in the crack propagation area. The relief of the crack growth areas for HCF and VHCF samples are similar to each other.
摘要：
高周和极高周疲劳断裂机制的比较分析(HCF，VHCF）制度是根据增材制造的316L不锈钢样品的断裂表面的多重分形分析结果进行的。就尺度不变量而言，显示了细颗粒区域内外的HCF和VHCF状态下的断裂表面形态。分析表明，在VHCF样品的裂纹萌生区中，浮雕形成的混沌模式普遍存在。然而,在裂纹扩展区域存在明显的相关性的自相似浮雕。HCF和VHCF样品的裂纹扩展区域的起伏彼此相似。
