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Fatigue-Property Enhancement of Magnesium Alloy, AZ31B, through Equal-Channel-Angular Pressing

  • Symposium: Deformation & Fracture from Nano to Macro: Honoring W.W. Gerberich’s 70th Birthday (dbahr@wsu.edu)
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Abstract

The fatigue behavior of magnesium-alloy, AZ31B, prestrained by equal-channel-angular pressing (ECAP) was studied as a function of the accumulated plastic-strain level and the orientation of the samples (along and perpendicular to the ECAP pressing direction). The material was processed via route B C , at 200 °C, for 1, 2, and 8 passes, with and without a back pressure (BP) applied on the billet during ECAP. The low-cycle fatigue behavior of the AZ31B alloy is shown to be anisotropic and texture dependent. Due to the initial texture orientation, the specimens loaded parallel to the ECAP pressing direction have a longer fatigue life than the samples loaded perpendicular to it. The low-cycle fatigue life of the AZ31B alloy is enhanced by ECAP. The fatigue-property improvement is discussed in light of the grain-size refinement, enhanced ductility, and texture evolution.

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ACKNOWLEDGMENTS

The authors are grateful for the financial support from (1) the University of Tennessee Scholarly Activities Research Incentive Fund (SARIF), (2) the Southeastern Universities Research Association (SURA), (3) the National Science Foundation-Combined Research-Curriculum Development Program (CRCD), under Grant No. EEC-9527527; (4) the National Science Foundation-Integrative Graduate Education and Research Training (IGERT) Program, under Grant No. DGE-9987548; and (5) the National Science Foundation-International Materials Institutes (IMI) Program, under Grant No. DMR-0231320.

This research is sponsored, in part, by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of FreedomCAR and Vehicle Technologies, as part of the High Temperature Materials Laboratory User Program, Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the United States Department of Energy under Contract No. DE-AC05-00OR22725.

The authors also thank Dr. T.M. Lillo at the INL for preparing the initial ECAP-deformed billets.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN, 37996-2200, USA

    Liang Wu (Graduate Student), Grigoreta M. Stoica (Graduate Student), Hao-Hsiang Liao (Graduate Student), Gongyao Wang (Graduate Students), Douglas E. Fielden (Instrument Maker Supervisor) & Peter K. Liaw (Professor)

  2. Department of Materials Science and Engineering, University of Virginia, Charlottesville, VA, 22904-4745, USA

    Sean R. Agnew (Assistant Professor)

  3. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA

    E. Andrew Payzant (Senior R&D Staff Member Supervisor)

  4. School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110023, People’s Republic of China

    Lijia Chen

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  1. Liang Wu
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  2. Grigoreta M. Stoica
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  3. Hao-Hsiang Liao
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  6. Gongyao Wang
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  8. Lijia Chen
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  9. Peter K. Liaw
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Correspondence to Liang Wu.

Additional information

This article is based on a presentation given in the symposium entitled “Deformation and Fracture from Nano to Macro: A Symposium Honoring W.W. Gerberich’s 70th Birthday,” which occurred during the TMS Annual Meeting, March 12–16, 2006 in San Antonio, Texas and was sponsored by the Mechanical Behavior of Materials and Nanomechanical Behavior Committees of TMS.

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Wu, L., Stoica, G.M., Liao, HH. et al. Fatigue-Property Enhancement of Magnesium Alloy, AZ31B, through Equal-Channel-Angular Pressing. Metall Mater Trans A 38, 2283–2289 (2007). https://doi.org/10.1007/s11661-007-9123-8

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  • DOI: https://doi.org/10.1007/s11661-007-9123-8

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