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Effect of Proximity and Dimension of Two Artificial Pitting Holes on the Fatigue Endurance of Aluminum Alloy AISI 6061-T6 Under Rotating Bending Fatigue Tests

  • Symposium: Fatigue & Corrosion Damage in Metallic Materials
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Abstract

This work deals with the study of the two artificial pitting holes effects, caused by their dimensions and proximity, on the fatigue endurance of aluminum alloy AISI 6061-T6 under rotating bending fatigue tests. Stress concentration induced by artificial pitting holes is analyzed and correlated with the experimental fatigue life. It is found that the stress concentration increases exponentially when the two pitting holes approach, and this induces an important reduction in the fatigue life. Concerning the diameter variation of one pitting in regard to the second, no important influence was observed on fatigue life for a given separation between them; this implies that the separation between the two artificial pitting holes and the associated stress concentration is the principal parameter on the fatigue life under these conditions. Finally, results are discussed and conclusions are presented involving the fatigue life, proximity, and dimension of pitting holes, stress concentration factor, and fracture surfaces where the failure origin is identified.

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Acknowledgments

The authors express their gratitude to the University of Michoacan (UMSNH) for the facilities received in the development of this work. A particular mention of gratitude is extended to CONACYT (National Counsel for Science and Technology, Mexico City) for the financial support destined to this research project.

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Authors and Affiliations

  1. Faculty of Mechanical Engineering, University of Michoacan (UMSNH), 58000, Morelia, Mich., Mexico

    G. M. Dominguez Almaraz (Professor), V. H. Mercado Lemus (M.Sc. Student) & J. J. Villalon Lopez (UMSNH Engineer)

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  1. G. M. Dominguez Almaraz
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  2. V. H. Mercado Lemus
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  3. J. J. Villalon Lopez
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Correspondence to G. M. Dominguez Almaraz.

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Manuscript submitted March 22, 2011.

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Dominguez Almaraz, G.M., Mercado Lemus, V.H. & Villalon Lopez, J.J. Effect of Proximity and Dimension of Two Artificial Pitting Holes on the Fatigue Endurance of Aluminum Alloy AISI 6061-T6 Under Rotating Bending Fatigue Tests. Metall Mater Trans A 43, 2771–2776 (2012). https://doi.org/10.1007/s11661-011-0799-4

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  • DOI: https://doi.org/10.1007/s11661-011-0799-4

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