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Overview of fatigue performance of Cu processed by severe plastic deformation

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Abstract

This study investigates discrepancies regarding cyclic softening of Cu processed by severe plastic deformation (SPD). All samples softened if the microhardnesses before and after fatiguing are compared. However, the effect decreases if the strain amplitude is small, Δεp <1 × 10−3). Samples with equiaxed subgrains were more resistant to softening and thermal recovery. All samples had “persistent” shear bands except those tested at the highest amplitudes, Δεp >1 × 10−2. Cu processed by SPD exhibits an enhanced fatigue life at low amplitudes. However, low thermal stability, potential for softening, and poor low-cycle properties discredit this advantage.

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Author notes

  1. S. R. Agnew

    Present address: Oak Ridge National Laboratory, 37831, Oak Ridge, TN, USA

  2. A. Yu. Vinogradov & S. Hashimoto

    Present address: Osaka City University, 558-8585, Osaka, Japan

Authors and Affiliations

  1. Northwestern University, 60208, Evanston, IL, USA

    S. R. Agnew & J. R. Weertman

  2. Kanazawa University, 920-5667, Kanazawa, Japan

    A. Yu. Vinogradov

  3. Kyoto University, 606-8501, Kyoto, Japan

    S. Hashimoto

Authors
  1. S. R. Agnew
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  2. A. Yu. Vinogradov
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  3. S. Hashimoto
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  4. J. R. Weertman
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Agnew, S.R., Vinogradov, A.Y., Hashimoto, S. et al. Overview of fatigue performance of Cu processed by severe plastic deformation. J. Electron. Mater. 28, 1038–1044 (1999). https://doi.org/10.1007/s11664-999-0181-0

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  • DOI: https://doi.org/10.1007/s11664-999-0181-0

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