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Title:Intrinsic fatigue limit and the minimum fatigue crack growth threshold
Authors:ID Chapetti, Mirco Daniel (Author)
ID Gubeljak, Nenad (Author)
ID Kozak, Dražan (Author)
Files:.pdf materials-16-05874.pdf (4,65 MB)
MD5: A8D9BBD671A2EBAD6551EFD86D34FF2A
URL of processed file: https://www.mdpi.com/1996-1944/16/17/5874
 
URL https://www.mdpi.com/1996-1944/16/17/5874
 
Language:English
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Abstract:In the field of long-life fatigue, predicting fatigue lives and limits for mechanical components is crucial for ensuring reliability and safety. Fracture mechanics tools have enabled the estimation of fatigue lives for components with small cracks or defects. However, when dealing with defects larger than the microstructural characteristic size, estimating the fatigue resistance of a material requires determining the cyclic resistance curve for the defect-free matrix, which depends on knowledge of the material’s intrinsic fatigue limit. This study focuses on the experimental evidence regarding the intrinsic fatigue limit and its correlation with naturally nucleated non-propagating cracks. Fracture mechanics models for small crack propagation are introduced, and their disparities and limitations are analyzed. The concept of intrinsic fatigue limit is then introduced and applied to reanalyze a recent publication. Methods for estimating the intrinsic fatigue limit are explored and applied to experimental results reported in the literature. The need to clarify and accurately predict the intrinsic fatigue limit is highlighted in alloys where the processing generates defects larger than the microstructural size of the matrix, as often observed in materials and components produced using additive manufacturing.In the field of long-life fatigue, predicting fatigue lives and limits for mechanical components is crucial for ensuring reliability and safety. Fracture mechanics tools have enabled the estimation of fatigue lives for components with small cracks or defects. However, when dealing with defects larger than the microstructural characteristic size, estimating the fatigue resistance of a material requires determining the cyclic resistance curve for the defect-free matrix, which depends on knowledge of the material’s intrinsic fatigue limit. This study focuses on the experimental evidence regarding the intrinsic fatigue limit and its correlation with naturally nucleated non-propagating cracks. Fracture mechanics models for small crack propagation are introduced, and their disparities and limitations are analyzed. The concept of intrinsic fatigue limit is then introduced and applied to reanalyze a recent publication. Methods for estimating the intrinsic fatigue limit are explored and applied to experimental results reported in the literature. The need to clarify and accurately predict the intrinsic fatigue limit is highlighted in alloys where the processing generates defects larger than the microstructural size of the matrix, as often observed in materials and components produced using additive manufacturing.
Keywords:intrinsic fatigue limit, microstructural fatigue threshold, material defects, fracture mechanics, intrinsic fatigue resistance
Publication status:Published
Publication version:Version of Record
Submitted for review:17.07.2023
Article acceptance date:23.08.2023
Publication date:28.08.2023
Publisher:MDPI
Year of publishing:2023
Number of pages:str. 1-20
Numbering:Vol. 16, iss. 17, [article no.] 5874
PID:20.500.12556/DKUM-85610 New window
UDC:539.42:620.178.3
ISSN on article:1996-1944
COBISS.SI-ID:163221251 New window
DOI:10.3390/ma16175874 New window
Publication date in DKUM:04.09.2023
Views:386
Downloads:43
Metadata:XML DC-XML DC-RDF
Categories:Misc.
:
CHAPETTI, Mirco Daniel, GUBELJAK, Nenad and KOZAK, Dražan, 2023, Intrinsic fatigue limit and the minimum fatigue crack growth threshold. Materials [online]. 2023. Vol. 16, no. 17,  5874, p. 1–20. [Accessed 23 April 2025]. DOI 10.3390/ma16175874. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=85610
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Record is a part of a journal

Title:Materials
Shortened title:Materials
Publisher:MDPI
ISSN:1996-1944
COBISS.SI-ID:33588485 New window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

Language:Slovenian
Keywords:mehanika loma, utrujenost materiala, meja utrujenosti materiala, deformacije, razpoke, mikrostruktura, zlitine


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