Fatigue Behavior, Crack Growth and Fatigue Life Assessment of Metallic Materials

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Failure Analysis".

Deadline for manuscript submissions: closed (31 March 2023) | Viewed by 7289

Special Issue Editor


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Guest Editor
Institute of Materials Science and Engineering, TU Kaiserslautern, 67763 Kaiserslautern, Germany
Interests: fatigue of metallic materials; thermomechanical fatigue; fatigue life assessment; steels; Ni-base allys; Al-base alloys

Special Issue Information

Dear Colleagues,

In many fields of engineering, e.g., in the energy industry, land, air, and sea-based traffic applications as well as production technology, fatigue is often a limiting factor for component lifetime. Appropriate design, which mitigates the risk of premature fatigue failure, restricts the possibilities for weight reduction of safety critical components in many cases and, therewith, attempts to increase efficiency and sustainability. Against this backdrop, an in-depth understanding of the fatigue behavior of metallic materials, considering the highly complex interactions of alloy composition, manufacturing processes, microstructure, as well as manufacturing-induced defects, e.g., voids or inclusions, and surface morphology are essential for a reliable and efficient component design as well as for the improvement of existing and the development of novel engineering materials. Taking into account the ongoing progress in alloy design and manufacturing technology, this underlines that research into fatigue of metallic materials is, since the groundbreaking work by Wöhler in the 19th century, still a “hot” topic of exceptional interest in many fields of engineering as well as in fundamental research. Closely linked with gaining knowledge and understanding of the complex influences on the fatigue behavior of metals, advanced approaches of fatigue life prediction, which increasingly make use of complex stochastic methodology, are an essential prerequisite of an efficient and sustainable component design.

For this Special Issue, we welcome experimentally based and theoretical articles addressing the topics briefly outlined above. With contributions presenting fundamental aspects as well as results from application-oriented research, we plan to foster communication between materials science and engineering with the overall aim to improve the understanding of fatigue processes in metals as well as an appropriate application of this knowledge in component design.

Prof. Dr. Tilmann Beck
Guest Editor

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Keywords

  • Low-cycle fatigue (LCF)
  • High-cycle fatigue (HCF)
  • Very-high-cycle fatigue (VHCF)
  • Thermomechanical fatigue (TMF)
  • Cyclic deformation behavior
  • Fatigue lifetime behavior
  • Fatigue crack initiation and propagation
  • Surface and manufacturing effects on the fatigue behavior
  • Lifetime assessment methods for fatigue

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Published Papers (1 paper)

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Review

26 pages, 3447 KiB  
Review
Prediction of Fatigue Crack Initiation under Variable Amplitude Loading: Literature Review
by Yahiya Ahmed Kedir and Hirpa G. Lemu
Metals 2023, 13(3), 487; https://doi.org/10.3390/met13030487 - 27 Feb 2023
Cited by 14 | Viewed by 6475
Abstract
Metallic materials are widely employed in engineering constructions, and one of the most common failure mechanisms in metals is fatigue failure. Even though metal fatigue has been studied for almost 160 years, many problems remain unsolved. Fatigue in metal occurs when the metallic [...] Read more.
Metallic materials are widely employed in engineering constructions, and one of the most common failure mechanisms in metals is fatigue failure. Even though metal fatigue has been studied for almost 160 years, many problems remain unsolved. Fatigue in metal occurs when the metallic material is subjected to varying loads, resulting in failure due to damage accumulation. The fatigue process consists of a buildup of damage that leads to crack initiation, followed by a period of crack growth until the critical flaw size is reached. The sum of a start phase and a propagation phase represents the total life. To better understand the fatigue phenomenon at its different stages and predict the fatigue life, various types of prediction models have been developed and reported in the literature. This paper reviewed the different models that include microstructure scale parameters that can be used to predict how fatigue cracks start under variable amplitude loading, including the Modified Tanaka-Mura Model, Acoustic Second Harmonic Generation, and the Probability of Crack Initiation on Defects. For perfect life prediction under variable amplitude loading, a stress-based approach, a strain-based approach, and a continuum damage mechanics approach are reviewed. The purpose of this paper is to get overview of the current state of approaches to the life prediction of fatigue crack initiation with variable amplitude. Finally, gaps in knowledge about the prediction of fatigue crack initiation under variable loading at high temperatures are pointed out. Full article
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