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

被引：1
|
作者：
Fiorentin, Felipe Klein [1 ,2 ]
Dantas, Rita [1 ,2 ,3 ]
Darabi, Roya [1 ,2 ]
Lesiuk, Grzegorz [4 ]
Figueiredo, Miguel [2 ]
de Castro, Paulo Tavares [2 ]
de Jesus, Abilio [1 ,2 ]
机构：
[1] INEGI, Dept Adv Mfg Technol UTAF, Porto, Portugal
[2] Univ Porto, Fac Engn, Dept Mech Engn, Porto, Portugal
[3] Construct, Porto, Portugal
[4] Univ Sci & Technol, Fac Mech Engn, Dept Mech Mat & Biomed Engn, Wroclaw, Poland
来源：
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2025年 / 48卷 / 01期
关键词：
additive manufacturing; crack growth rate; fatigue; fracture surface; Inconel; 625; striations; PROPAGATION;
D O I：
10.1111/ffe.14493
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
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.
引用
收藏
页码：454 / 466
页数：13
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