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Microstructure evolution of Mg-3%Al-1%Zn alloy tube during warm bending

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Abstract

Microstructure evolution and deformation mechanisms of AZ31 magnesium alloy tubes during bending have been investigated. Dislocation slip appears to be the main deformation mechanism, along with a few {10–12} [−1011] extension twins at the outer bend radius which undergoes tensile deformation. In contrast, the material in the tube wall at the inner bend radius of the tube, which undergoes compression, deforms mainly by extension twinning. This understanding of deformation mechanisms has explain the optimum bending temperature of 150–200 °C for the AZ31 tubes where both slip and twinning are active.

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Acknowledgements

This study was carried out as a collaborative research project supported by General Motors Global Research and Development Center (Warren, MI, USA). One of the authors, Li Jin, acknowledges the financial support of National Natural Sciences Foundation of China (Grant No. 50901044) and National Ministry of Science and Technology (2011BAE22B06).

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Authors and Affiliations

  1. National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai, China

    Li Jin, Jie Dong & Wenyun Wu

  2. Key State Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai, China

    Li Jin & Jie Dong

  3. General Motors Research & Development Center, Warren, MI, 48090, USA

    Alan A. Luo, Raj K. Mishra & Anil K. Sachdev

Authors
  1. Li Jin
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  2. Jie Dong
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  3. Alan A. Luo
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  4. Raj K. Mishra
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  6. Wenyun Wu
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Correspondence to Li Jin.

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Jin, L., Dong, J., Luo, A.A. et al. Microstructure evolution of Mg-3%Al-1%Zn alloy tube during warm bending. J Mater Sci 47, 3801–3807 (2012). https://doi.org/10.1007/s10853-011-6234-9

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  • DOI: https://doi.org/10.1007/s10853-011-6234-9

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