Investigation on the High‐Cycle Fatigue Behavior of Domestic Zr‐2.5Nb Alloy in Consideration of Notch Effects.
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| Title: | Investigation on the High‐Cycle Fatigue Behavior of Domestic Zr‐2.5Nb Alloy in Consideration of Notch Effects. |
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| Authors: | Ding, Wenjing1 (AUTHOR), Bao, Chen1 (AUTHOR) bchxx@163.com |
| Source: | Fatigue & Fracture of Engineering Materials & Structures. Aug2026, Vol. 49 Issue 8, p3252-3262. 11p. |
| Subjects: | Notch effect, High cycle fatigue, Microstructure, Fatigue life, Zirconium alloys, Nuclear reactor materials, Crack propagation |
| Abstract: | The Zr‐2.5Nb alloy used for pressure tubes in heavy‐water reactors was utilized to investigate its high‐cycle fatigue (HCF) behavior at room temperature using both smooth and notched specimens. Based on the Theory of Critical Distance (TCD), the influence of notch geometry on fatigue behavior and life prediction was systematically examined. The fatigue failure mechanisms were further elucidated through micrographic observation. The results indicate that the main factors of fatigue life differ substantially between smooth and notched specimens, as well as crack initiation and propagation characteristics. For Zr‐2.5Nb with smaller grain sizes, typical spalling‐like stepped morphologies are observed on the fracture surface under high stress levels. Stress concentration significantly affects both the number and distribution of fatigue crack initiation sites. The TCD was employed to predict the fatigue life of two types of specimens with different notch sizes, and the results indicate that TCD provides a high prediction accuracy. The present results provide a reliable fatigue database for the assessment of domestic Zr‐2.5Nb pressure tube materials and support the applicability of TCD‐based design methodologies in nuclear engineering components. Summary: HCF behavior of Zr‐2.5Nb alloy with varying notch radii was systematically investigated.TCD effectively predicts the fatigue life of notched Zr‐2.5Nb alloy.Notch geometry drives initiation, whereas α/β microstructure induces crack deflection. [ABSTRACT FROM AUTHOR] |
| Copyright of Fatigue & Fracture of Engineering Materials & Structures is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 195038585 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Investigation on the High‐Cycle Fatigue Behavior of Domestic Zr‐2.5Nb Alloy in Consideration of Notch Effects. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Ding%2C+Wenjing%22">Ding, Wenjing</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bao%2C+Chen%22">Bao, Chen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> bchxx@163.com</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Fatigue+%26+Fracture+of+Engineering+Materials+%26+Structures%22">Fatigue & Fracture of Engineering Materials & Structures</searchLink>. Aug2026, Vol. 49 Issue 8, p3252-3262. 11p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Notch+effect%22">Notch effect</searchLink><br /><searchLink fieldCode="DE" term="%22High+cycle+fatigue%22">High cycle fatigue</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Fatigue+life%22">Fatigue life</searchLink><br /><searchLink fieldCode="DE" term="%22Zirconium+alloys%22">Zirconium alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+reactor+materials%22">Nuclear reactor materials</searchLink><br /><searchLink fieldCode="DE" term="%22Crack+propagation%22">Crack propagation</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The Zr‐2.5Nb alloy used for pressure tubes in heavy‐water reactors was utilized to investigate its high‐cycle fatigue (HCF) behavior at room temperature using both smooth and notched specimens. Based on the Theory of Critical Distance (TCD), the influence of notch geometry on fatigue behavior and life prediction was systematically examined. The fatigue failure mechanisms were further elucidated through micrographic observation. The results indicate that the main factors of fatigue life differ substantially between smooth and notched specimens, as well as crack initiation and propagation characteristics. For Zr‐2.5Nb with smaller grain sizes, typical spalling‐like stepped morphologies are observed on the fracture surface under high stress levels. Stress concentration significantly affects both the number and distribution of fatigue crack initiation sites. The TCD was employed to predict the fatigue life of two types of specimens with different notch sizes, and the results indicate that TCD provides a high prediction accuracy. The present results provide a reliable fatigue database for the assessment of domestic Zr‐2.5Nb pressure tube materials and support the applicability of TCD‐based design methodologies in nuclear engineering components. Summary: HCF behavior of Zr‐2.5Nb alloy with varying notch radii was systematically investigated.TCD effectively predicts the fatigue life of notched Zr‐2.5Nb alloy.Notch geometry drives initiation, whereas α/β microstructure induces crack deflection. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Fatigue & Fracture of Engineering Materials & Structures is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1111/ffe.70314 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 11 StartPage: 3252 Subjects: – SubjectFull: Notch effect Type: general – SubjectFull: High cycle fatigue Type: general – SubjectFull: Microstructure Type: general – SubjectFull: Fatigue life Type: general – SubjectFull: Zirconium alloys Type: general – SubjectFull: Nuclear reactor materials Type: general – SubjectFull: Crack propagation Type: general Titles: – TitleFull: Investigation on the High‐Cycle Fatigue Behavior of Domestic Zr‐2.5Nb Alloy in Consideration of Notch Effects. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Ding, Wenjing – PersonEntity: Name: NameFull: Bao, Chen IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 08 Text: Aug2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 8756758X Numbering: – Type: volume Value: 49 – Type: issue Value: 8 Titles: – TitleFull: Fatigue & Fracture of Engineering Materials & Structures Type: main |
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