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Role of Dispersoids on the Fatigue Behavior of Aluminum Alloys: A Review

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Fatigue of Materials III

Abstract

Aluminum alloys contain dispersoids, namely thermodynamically stable second phase particles ranging in size from 0.1 to 1.0 µm, which are used, for example, to control grain size. The presence of second phase particles could have a beneficial or detrimental effect on fatigue behavior depending on their properties and distribution within the aluminum matrix. Hard non-shearable particles promote cross-slip and deformation homogenization that delays fatigue crack initiation, while shearable particles result in planar slip, which promote strain reversal and crack closure and slows crack propagation. Cracking and fragmentation of the particles, or strain incompatibility at the interface of the dispersoids with the matrix, can lead to the nucleation of cracks ahead of the main advancing crack. This paper presents a review of the effect of dispersoids on the fatigue behavior of aluminum alloys.

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Author information

Authors and Affiliations

  1. Department of Mechanical and Materials Engineering, Wright State University, Dayton, OH, 45435, USA

    Raghavan Srinivasan

  2. Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC, 20052, USA

    M. Ashraf Imam

Authors
  1. Raghavan Srinivasan
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  2. M. Ashraf Imam
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Editor information

Editors and Affiliations

  1. Department of Mechanical Engineering, The University of Akron, USA

    T. S. Srivatsan (Professor of Materials Science and Engineering) (Professor of Materials Science and Engineering)

  2. George Washington University, Washington, DC, USA

    M. Ashraf Imam (Professor of Materials Science) (Professor of Materials Science)

  3. Mechanical and Materials Engineering Department, Materials Science and Engineering Program, Wright State University, Dayton, Ohio, USA

    R. Srinivasan (Professor, Director) (Professor, Director)

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© 2016 The Minerals, Metals & Materials Society

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Srinivasan, R., Imam, M.A. (2016). Role of Dispersoids on the Fatigue Behavior of Aluminum Alloys: A Review. In: Srivatsan, T.S., Imam, M.A., Srinivasan, R. (eds) Fatigue of Materials III. Springer, Cham. https://doi.org/10.1007/978-3-319-48240-8_2

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