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Influence of Low Temperature Forging on Microstructure and Low Cycle Fatigue Behavior of Cast AZ31B Mg Alloy

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Magnesium Technology 2018 (TMS 2018)

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Abstract

The effect of low temperature forging on the microstructure, quasi-static response and stress-controlled fatigue behavior of cast AZ31B Mg alloy was investigated. The forging process was conducted at a temperature of 275 °C and a forging rate of 20 mm/s. Fully reversed stress controlled cyclic tests were performed on cast and forged material under total stress amplitudes of 120–160 MPa. Neckless type bimodal grain structure, an indication of incomplete dynamic recrystallization was observed in the forged microstructure in addition to the development of a sharp basal texture. The obtained mechanical test results show that the forged material achieved significantly improved yield and tensile strengths along with longer fatigue life. The improvement in the quasi-static properties was attributed to the strengthening effect of partial grain refinement and activation of non-basal slip modes due to texture modification.

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Acknowledgements

The financial support of the Natural Sciences and Engineering Research Council of Canada (NSERC) through the Automotive Partnership Canada (APC) program under APCPJ 459269–13 grant with contributions from Multimatic Technical Centre, Ford Motor Company, and Centerline Windsor are acknowledged. The authors would also like to thank J. McKinley and L. Blaga of CanmetMATERIALS for assistance with the forging trials.

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Authors and Affiliations

  1. Department of Mechanical and Mechatronics Engineering, University of Waterloo, 200 University Ave W, Waterloo, ON, N2L 3G1, Canada

    D. Toscano, S. K. Shaha, B. Behravesh & H. Jahed

  2. CanmetMATERIALS, Natural Resources Canada, 183 Longwood Road South, Hamilton, ON, L8P 0A1, Canada

    B. Williams

  3. Ford Motor Company, 2101 Village Rd, Dearborn, MI, 48124, USA

    X. Su

Authors
  1. D. Toscano
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  2. S. K. Shaha
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  3. B. Behravesh
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  4. H. Jahed
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  5. B. Williams
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  6. X. Su
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Corresponding author

Correspondence to S. K. Shaha .

Editor information

Editors and Affiliations

  1. Lund University, Lund, Sweden

    Dmytro Orlov

  2. Pacific Northwest National Laboratory, Richland, Washington, USA

    Vineet Joshi

  3. Arizona State University, Tempe, Arizona, USA

    Kiran N. Solanki

  4. IND LLC, South Jordan, Utah, USA

    Neale R. Neelameggham

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© 2018 The Minerals, Metals & Materials Society

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Toscano, D., Shaha, S.K., Behravesh, B., Jahed, H., Williams, B., Su, X. (2018). Influence of Low Temperature Forging on Microstructure and Low Cycle Fatigue Behavior of Cast AZ31B Mg Alloy. In: Orlov, D., Joshi, V., Solanki, K., Neelameggham, N. (eds) Magnesium Technology 2018. TMS 2018. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-72332-7_41

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