Relation Between Striations Spacing and Fatigue Crack Growth Rates for Additive Manufactured Inconel 625

IF 3.1 2区材料科学 Q2 ENGINEERING, MECHANICAL

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2024-11-03 DOI:10.1111/ffe.14493

Felipe Klein Fiorentin, Rita Dantas, Roya Darabi, Grzegorz Lesiuk, Miguel Figueiredo, Paulo Tavares de Castro, Abílio de Jesus

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引用次数: 0

Abstract

The principles of the mechanisms for fatigue crack propagation in metals have been established several decades ago. By definition, fatigue might be summarized as a damage process imparted to a material under the action of cyclic loads. The relation between fatigue crack growth rates (FCGRs) and formation of striation marks has been a controversial topic. Some authors stated that, in certain fatigue regimes, several fatigue cycles are required to form a single striation. The disagreement found was the motivation for the present work. This study's main goal is to provide a comparison between the striation spacing and the respective FCGR. These analyses will be performed in a Nickel superalloy, Inconel 625, obtained via directed energy deposition. Investigation of the striations spacing are compared with data obtained from FCGR tests. A good agreement between striation spacing and FCGRs was found to intermediate and large values of stress intensity factor.

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金属疲劳裂纹扩展机制的原理早在几十年前就已确立。根据定义，疲劳可概括为材料在循环载荷作用下产生的一种损伤过程。疲劳裂纹增长率（FCGRs）与条纹痕迹的形成之间的关系一直是一个有争议的话题。一些学者指出，在某些疲劳状态下，形成一个条纹需要多次疲劳循环。这种分歧正是本研究的动机。本研究的主要目标是对条纹间距和各自的 FCGR 进行比较。这些分析将在通过定向能沉积获得的镍超合金 Inconel 625 中进行。对条纹间距的研究将与 FCGR 测试获得的数据进行比较。在应力强度因子的中间值和较大值范围内，条纹间距与 FCGR 之间存在良好的一致性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fatigue & Fracture of Engineering Materials & Structures 工程技术-材料科学：综合

CiteScore

6.30

自引率

18.90%

发文量

256

审稿时长

4 months

期刊介绍： Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.