高界面强度与mccrally涂层高温合金开裂行为的关系

IF 1.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Technology Pub Date : 2023-04-16 DOI:10.1080/02670836.2023.2199571

Jianan Song, Jia Huang, Zhilai Lu, H. Qi

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引用次数: 2

摘要

在本研究中，我们研究了具有不同界面强度的mcrally涂层高温合金的开裂行为。提出了一种描述涂层与基体界面处疲劳裂纹萌生和扩展的循环损伤-耦合内聚区模型。我们的研究结果表明，由于界面刚度的增加，高界面强度导致显著的应力集中。此外，高界面强度延缓了界面裂纹扩展，但促进了变形能在基体中的积累，加速了基体疲劳裂纹的萌生。这项工作显示了高界面强度的两个方面，可以为涂层设计提供新的见解。

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Two aspects of high interfacial strength regarding the cracking behaviour of MCrAlY-coated superalloys

In this study, we investigated the cracking behaviour of MCrAlY-coated superalloys having different interfacial strengths. A cyclic damage-coupled cohesive zone model is proposed to describe the fatigue crack initiation and propagation at the interface between the coating and the substrate. Our results indicate that a high interfacial strength leads to a significant stress concentration owing to the increasing interfacial stiffness. Moreover, high interfacial strength delays interfacial crack propagation but promotes the accumulation of deformation energy in the substrate, which accelerates fatigue crack initiation in the substrate. This work shows two aspects of high interfacial strength and can provide new insights into coating design.

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来源期刊

Materials Science and Technology 工程技术-材料科学：综合

CiteScore

2.70

自引率

5.60%

发文量

审稿时长

3 months

期刊介绍：《Materials Science and Technology》（MST） is an international forum for the publication of refereed contributions covering fundamental and technological aspects of materials science and engineering.