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首页> 外文会议>Virtual European Conference on Fracture >Fatigue fracture crack paths generated by manufacturing-induced microstructural strength anisotropy in cold drawn pearlitic steels: (a) In the conceptual framework of Maurits Cornelis Escher and Johann Sebastian Bach; (b) An Orteguian approach as well as a heartfelt tribute to Fray Luis de Leon's 'deciamos ayer'
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Fatigue fracture crack paths generated by manufacturing-induced microstructural strength anisotropy in cold drawn pearlitic steels: (a) In the conceptual framework of Maurits Cornelis Escher and Johann Sebastian Bach; (b) An Orteguian approach as well as a heartfelt tribute to Fray Luis de Leon's 'deciamos ayer'

机译：疲劳和裂缝裂纹裂缝通过制造诱导的微观结构和强度各向异性在寒冷的珠光钢中产生的裂缝路径：（a）在Maurits Cornelis eScher和Johann Sebastian Bach的概念框架中; （b）一个orteguian方法以及对Fray Luis de Leon的“Defiamos Ayer”的衷心致敬

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This paper analyses both fatigue & fracture crack paths generated by manufacturing-induced microstructural & strength anisotropy in cold drawn pearlitic steels, on the basis of their microstructural evolution during manufacturing by multi-step cold drawing that produces slenderizing and orientation of the pearlitic colonies, together with densification and orientation of the Fe/Fe3C lamellae, reviewing previous research by the author and co-workers on fracture behaviour in inert and aggressive environments in the presence of crack and notches, with focus on hydrogen embrittlement. Results demonstrate the key role of manufacturing-induced microstructural anisotropy (orientation of the two microstructural levels of pearlitic colonies and ferrite/cementite lamellae as a consequence of the progressive/repetitive cold drawing) in the fatigue & fracture crack paths, thus producing crack path deflection/deviation/branching with mixed-mode crack growth and associated anisotropy of fatigue & fracture resistance and its linked anisotropic fatigue & fracture behaviour (strength anisotropy), allowing the definition of a directional toughness depending on the specific crack path with its propagation direction. From the point of view of the analysed material (progressively cold drawn pearlitic steel, a hierarchically structured material with colonies and lamellae), the present scientific work is related to the conceptual frame of Maurits Comelis Escher and Johann Sebastian Bach. In addition, the paper represents an Orteguian approach (on the basis of the circumstance formulated by Jose Ortega y Gasset) to the problem of fatigue & fracture of progressively cold drawn pearlitic steel and a tribute to Fray Luis de Leon's "deciamos ayer".
机译：本文通过多步冷绘制过程中的微观结构演变，分析了通过制造诱导的微观结构和强度各向异性产生的疲劳和断裂裂纹路径，其通过多步冷绘制过程中的微观结构演化，产生珠氏菌落的稀疏化和取向凭借Fe / Fe3C Lamellae的致密化和取向，在裂纹和凹口存在下，作者和同官员审查了作者和同事在惰性和侵蚀性环境中的骨折行为的研究，重点是氢脆性。结果证明了制造诱导的微观结构各向异性（珠光体菌落和铁氧体含量的两个微观结构水平的取向作为渐进式/重复性冷绘制的两个微观结构水平的取向）在疲劳和裂缝裂纹路径中产生的，从而产生裂纹路径偏转/偏差/分支与混合模式裂纹生长和疲劳和断裂抗性的相关各向异性及其连接的各向异性疲劳和断裂行为（强度各向异性），允许根据具有其传播方向的特定裂纹路径定义方向韧性。从分析的材料（逐渐冷的珠光体钢，带有殖民地和Lamellae的分层结构化材料），目前的科学工作与Maurits Comelis Escher和Johann Sebastian Bach的概念框架有关。此外，本文代表了一个orteguian方法（基于Jose Ortega Y Gasset制定的情况）对逐步冷绘的珠光体钢的疲劳和骨折问题以及致敬的Fray Luis de Leon的“Defiamos Ayer”。

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