Fatigue Limit of Metals
A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Failure Analysis".
Deadline for manuscript submissions: closed (31 January 2021) | Viewed by 33377
Special Issue Editor
Interests: fatigue limit; S–N curve; residual stresses; microstructure-based fatigue model; manufacturing processes
Special Issues, Collections and Topics in MDPI journals
Special Issue Information
Dear Colleagues,
The S–N curve of most steels and titanium alloys presents a practically horizontal zone starting at the interval between 10e6 and 10e7 cycles. Assuming that this curve corresponds to a probability of failure, for a given R-value (Smin–Smax ratio), the fatigue limit would provide a stress value to use as a reference for mechanical design. Other materials, however, do not have this horizontal zone, and the fatigue design will be determined by fixing a given durability together with the corresponding fatigue strength. On the other hand, it is also known that for higher order durability values (gigacycles, UHCF), other crack generation mechanisms are activated that may lead to a decrease in the standard fatigue limit. However, many times, these durations may exceed the useful life of the machine, though not always.
In this Special Issue, we aim to gather studies that focus on aspects that influence the fatigue limit (both conventional and gicacycle) and the S–N curve. Studies on the influence of the processes of obtaining the material (composition, grain size, and subsequent thermal or surface treatments), manufacturing processes and later treatments (such as SP, LSP, LPB, and welding), additive manufacturing, residual stresses, and tribological parameters in the fatigue limit value are welcome. Studies on the use of time-varying stress values in fatigue design (cumulative damage) and the influence of mean tensile and compressive stresses (behavior models in the Haigh diagram for infinite life), as well as uniaxial and multi-axial fatigue methods, are also welcome.
Prof. Dr. Joseba Albizuri
Guest Editor
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Keywords
- S–N curve
- Fatigue limit
- Multistage fatigue life diagram
- Microstructure-based fatigue model
- Residual stresses
- Haigh diagram
- Manufacturing processes
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