Topic
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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TL;DR: In this paper, a procedure to measure the very small quantities of heat generated during the very first cycles of mechanical loading on metallic specimens was presented to reach the required sensitivity in terms of heat sources with some original features with respect to the present state of the art.
98 citations
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TL;DR: In this article, the authors present the modeling and simulation of the residual stress field resulting from the shot peening process and show that a significant decrease of welding induced tensile residual stress magnitude can be obtained.
98 citations
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TL;DR: This work proposes and demonstrates a microstructural design strategy to overcome the limitation of metallic glass-matrix composites as resistant to fatigue damage by matching the microStructural length scales (of the second phase) to mechanical crack-length scales.
Abstract: The recent development of metallic glass-matrix composites represents a particular milestone in engineering materials for structural applications owing to their remarkable combination of strength and toughness. However, metallic glasses are highly susceptible to cyclic fatigue damage, and previous attempts to solve this problem have been largely disappointing. Here, we propose and demonstrate a microstructural design strategy to overcome this limitation by matching the microstructural length scales (of the second phase) to mechanical crack-length scales. Specifically, semisolid processing is used to optimize the volume fraction, morphology, and size of second-phase dendrites to confine any initial deformation (shear banding) to the glassy regions separating dendrite arms having length scales of ≈2 μm, i.e., to less than the critical crack size for failure. Confinement of the damage to such interdendritic regions results in enhancement of fatigue lifetimes and increases the fatigue limit by an order of magnitude, making these “designed” composites as resistant to fatigue damage as high-strength steels and aluminum alloys. These design strategies can be universally applied to any other metallic glass systems.
98 citations
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TL;DR: In this paper, two critical plane multiaxial fatigue criteria were evaluated in terms of fatigue life predictions based on the experimental results. But, the fatigue life prediction made by the Fatemi-Socie criterion did not agree well with the test results in the high-cycle fatigue regime.
97 citations
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TL;DR: In this article, an increase in high-cycle fatigue lifetime with a decrease in peak stress, the dependence of fatigue on the cyclic stress levels but not on the frequency of the cycle, and morphological changes in the surface silica during fatigue.
Abstract: Dynamic fatigue of silicon is a fairly recent area of materials research, having been detected for the first time in 1992. Within the past year, there have been several reports on silicon fatigue behavior describing novel phenomena and models for their origin. The findings include: an increase in high-cycle fatigue lifetime with a decrease in peak stress, the dependence of fatigue on the cyclic stress levels but not on the frequency of the cycle, and morphological changes in the surface silica during fatigue. Of the mechanisms proposed, the most likely candidate is one that involves mechanically induced damage in the silicon as a result of cyclic stresses. � 2003 Elsevier Ltd. All rights reserved.
97 citations