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Volume 10
Issue 23
10.3390/app10238475
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Review

Properties of the Fine Granular Area and Postulated Models for Its Formation during Very High Cycle Fatigue—A Review

by
Jan Patrick Sippel
* and
Eberhard Kerscher
Materials Testing (AWP), Technische Universität Kaiserslautern (TUK), D-67663 Kaiserslautern, Germany
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(23), 8475; https://doi.org/10.3390/app10238475
Submission received: 2 November 2020 / Revised: 25 November 2020 / Accepted: 26 November 2020 / Published: 27 November 2020
(This article belongs to the Special Issue Advances in Very-High-Cycle Fatigue)
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Abstract

Understanding the mechanisms leading to very high cycle fatigue is necessary to make predictions about the behavior under various conditions and to ensure safe design over the whole lifetime of high-performance components. It is further vital for the development of possible measures to increase the very high cycle fatigue strength. This review therefore intends to give an overview of the properties of the fine granular area that have been observed so far. Furthermore, the existing models to describe the early crack initiation and crack growth within the very high cycle fatigue regime are outlined and the models are evaluated on the basis of the identified fine granular area properties. The aim is to provide an overview of the models that can already be considered refuted and to specify the respective open questions regarding the other individual models.
Keywords: very high cycle fatigue; ultra-high cycle fatigue; ultralong life fatigue; gigacycle fatigue; crack initiation; fine granular area; optically dark area; granular bright facet; rough granular area very high cycle fatigue; ultra-high cycle fatigue; ultralong life fatigue; gigacycle fatigue; crack initiation; fine granular area; optically dark area; granular bright facet; rough granular area

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MDPI and ACS Style

Sippel, J.P.; Kerscher, E. Properties of the Fine Granular Area and Postulated Models for Its Formation during Very High Cycle Fatigue—A Review. Appl. Sci. 2020, 10, 8475. https://doi.org/10.3390/app10238475

AMA Style

Sippel JP, Kerscher E. Properties of the Fine Granular Area and Postulated Models for Its Formation during Very High Cycle Fatigue—A Review. Applied Sciences. 2020; 10(23):8475. https://doi.org/10.3390/app10238475

Chicago/Turabian Style

Sippel, Jan Patrick, and Eberhard Kerscher. 2020. "Properties of the Fine Granular Area and Postulated Models for Its Formation during Very High Cycle Fatigue—A Review" Applied Sciences 10, no. 23: 8475. https://doi.org/10.3390/app10238475

APA Style

Sippel, J. P., & Kerscher, E. (2020). Properties of the Fine Granular Area and Postulated Models for Its Formation during Very High Cycle Fatigue—A Review. Applied Sciences, 10(23), 8475. https://doi.org/10.3390/app10238475

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