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Texture Modification During Extrusion of Some Mg Alloys

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Abstract

The effects of extrusion ratio and alloying addition on the microstructure of Mg-0.2 wt pct Ce alloys are investigated by electron backscatter diffraction. The results show that in this alloy, texture randomization does not occur at high or low extrusion ratios but at a ratio of 25:1 at 400 °C. When extruded at the same temperature and extrusion ratio, Ca addition to Mg results in a weak nonbasal texture. In contrast, Mg-Al and Mg-3 wt pct Al-0.2 wt pct Ce alloys do not exhibit texture modification in single-pass extrusion. In the Mg-Al-Ce alloy, Ce and Al form Al11Ce3 particles, leaving little Ce solute in the matrix. The texture modifications in Mg-Ce or Mg-Ca alloys are related to the nature of the solid solution and consistent with dynamic strain aging during extrusion.

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  1. WELLMAN ENEFCO is a trademark of WELLMAN ENEFCO LIMITED, West Yorkshire, UK.

  2. LEO is a trademark of Carl Zeiss Microscopy, Jena, Germany.

  3. TSL is a trademark of EDAX company, Mahwah, NJ.

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Acknowledgments

This research was sponsored by a General Motors (GM)–Shanghai Jiao Tong University research collaboration. One of the authors (L. JIN) acknowledges the financial support of the National Natural Sciences Foundation of China (Grant No. 50901044). The authors thank Robert Kubic for technical assistance in EBSD data collection experiments.

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Authors and Affiliations

  1. National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai, 200240, P.R. China

    Li Jin (Associate Professor)

  2. General Motors Global Research & Development, Warren, MI, 48090-9055, USA

    Raja K. Mishra (Staff Researcher) & Anil K. Sachdev (Lab Group Manager)

Authors
  1. Li Jin
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  2. Raja K. Mishra
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  3. Anil K. Sachdev
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Correspondence to Li Jin.

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Manuscript submitted December 22, 2010.

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Jin, L., Mishra, R.K. & Sachdev, A.K. Texture Modification During Extrusion of Some Mg Alloys. Metall Mater Trans A 43, 2148–2157 (2012). https://doi.org/10.1007/s11661-011-0994-3

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