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Fatigue limit

About: Fatigue limit is a research topic. Over the lifetime, 20489 publications have been published within this topic receiving 305744 citations. The topic is also known as: endurance limit & fatigue strength.


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Journal ArticleDOI
TL;DR: In this paper, the effect of machining on the fatigue life of an EN X155CrMoV12 tool steel (SAE J438b) with regard to the generation of near-surface residual stress and microstructural modification of the machined surface was discussed.
Abstract: This study concerns the effect of machining on the fatigue life of an EN X155CrMoV12 tool steel (SAE J438b), with regard to the generation of near-surface residual stress and microstructural modification of the machined surface. Two possible methods for machining tool steels were compared: electro-discharge machining (EDM), a high energy density process, and milling, a more conventional cutting process. Particular attention was given to characterization of the surface roughness, microstructure, and residual stress, using a combination of microstructural analysis, crack observation, scanning electron microscopy (SEM), x-ray diffraction (XRD), and chemical composition changes by energy-dispersive x-ray. A decrease of around 35% in the fatigue limit was observed for the EDM samples, compared with the milled samples. This was attributed to a tensile residual stress state after EDM, combined with significant phase transformation and hydrogen embrittlement. The milled surfaces showed no microstructural transformation or surface cracking and contained compressive residual stresses, all of which contributed to an improved fatigue resistance.

75 citations

Journal ArticleDOI
TL;DR: In this article, the fatigue behavior of a 316L type stainless steel was investigated in the temperature range 20-600°C in order to determine the intrinsic effect of temperature on fatigue lifetime and cyclic properties.
Abstract: In the present work, the fatigue behavior of a 316L type stainless steel was investigated in the temperature range 20–600°C. Fatigue experiments at constant plastic strain amplitude were carried out in vacuum in order to determine the intrinsic effect of temperature on fatigue lifetime and cyclic properties. A particular behavior has been pointed out at intermediate temperatures (200–400°C) at which dynamic strain ageing takes place. This behavior is characterized by a strong secondary cyclic hardening and at the same time by a significant increase of the fatigue resistance. In air the role of temperature is affected by the environment coupled effects.

75 citations

Journal Article
TL;DR: In this article, the influence of moisture uptake on the mechanical behavior of unidirectional flax fiber-reinforced epoxy laminates was investigated and free vibration characterization was carried out.

75 citations

Journal ArticleDOI
TL;DR: Water peening with pressures up to 100 MPa has been developed as a new mechanical surface strengthening process as mentioned in this paper, where high-frequent impact of water drops on the surface of steel components causes local plastic deformation.

75 citations

Journal ArticleDOI
01 Jan 2003
TL;DR: In this paper, the authors evaluated the titanium model to be used for medical purposes in rapid prototyping with the selective laser melting process, the influence of forming conditions on the mechanical properties is investigated.
Abstract: In order to evaluate the titanium model to be used for medical purposes in rapid prototyping with the selective laser melting process, the influence of forming conditions on the mechanical properties is investigated. The density and mechanical properties such as tensile and fatigue strengths of the model are measured. In the selective laser melting process, a pulsed yttrium aluminium garnet (YAG) laser with average power of 50 W and maximum peak power of 3 kW is used. The specimens for measuring density and mechanical properties are made from commercial pure titanium powders (grade 1) in a controlled atmosphere with argon gas. It is found that the relative density of the model is higher than 92 per cent and some powder particles remain within the solidified model. The scan speed affects the tensile strength strongly and the tensile strength is around 120 per cent of the standard value of the solid pure titanium when the scan speed is appropriate. However, the fatigue strength is low, about 10 per ...

75 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023248
2022586
2021616
2020684
2019749
2018712