| Naslov: | Intrinsic fatigue limit and the minimum fatigue crack growth threshold |
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| Avtorji: | ID Chapetti, Mirco Daniel (Avtor)
ID Gubeljak, Nenad (Avtor)
ID Kozak, Dražan (Avtor) |
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| Datoteke: |  materials-16-05874.pdf (4,65 MB)
MD5: A8D9BBD671A2EBAD6551EFD86D34FF2A
URL obdelane datoteke: https://www.mdpi.com/1996-1944/16/17/5874
 https://www.mdpi.com/1996-1944/16/17/5874
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| Jezik: | Angleški jezik |
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| Vrsta gradiva: | Članek v reviji |
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| Tipologija: | 1.01 - Izvirni znanstveni članek |
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| Organizacija: | FS - Fakulteta za strojništvo
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| Opis: | 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. |
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| Ključne besede: | intrinsic fatigue limit, microstructural fatigue threshold, material defects, fracture mechanics, intrinsic fatigue resistance |
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| Status publikacije: | Objavljeno |
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| Verzija publikacije: | Objavljena publikacija |
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| Poslano v recenzijo: | 17.07.2023 |
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| Datum sprejetja članka: | 23.08.2023 |
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| Datum objave: | 28.08.2023 |
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| Založnik: | MDPI |
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| Leto izida: | 2023 |
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| Št. strani: | str. 1-20 |
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| Številčenje: | Vol. 16, iss. 17, [article no.] 5874 |
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| PID: | 20.500.12556/DKUM-85610  |
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| UDK: | 539.42:620.178.3 |
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| COBISS.SI-ID: | 163221251 |
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| DOI: | 10.3390/ma16175874 |
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| ISSN pri članku: | 1996-1944 |
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| Datum objave v DKUM: | 04.09.2023 |
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| Število ogledov: | 602 |
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| Število prenosov: | 76 |
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| Metapodatki: |    |
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| Področja: | Ostalo
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