EBSD Characterization of the Laser Remelted Surface Layers in a Commercially Pure Mg

doi:10.1016/j.jmst.2013.10.002

J. Mater. Sci. Technol.

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EBSD Characterization of the Laser Remelted Surface Layers in a Commercially Pure Mg

Kemin Zhang¹⁾, Jianxin Zou^2), Jun Li¹⁾, Zhishui Yu¹⁾

1) School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
2) National Engineering Research Center of Light Alloys Net Forming & School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Received:2012-04-06 Revised:2013-02-09 Online:2014-03-15 Published:2014-03-17
Contact: K. Zhang
Supported by:
Special Foundation of the Shanghai Science and Technology Committee for Nano-Materials Research (No. 1052nm05000) and the National Natural Science Foundation of China (Nos. 51101096, 51271121 and 51002093).

Abstract

Abstract:

Laser surface melting has been applied on a commercially pure Mg. The microstructure and texture modifications encountered in the surface layers were carefully investigated by using electron backscattered diffraction (EBSD) technique. Due to the melting followed by rapid solidification and cooling, a layer having graded microstructures and texture formed. At the bottom of the melted layer, the solidified Mg grains have an elongated shape with a <0001> basal fibre texture nearly parallel to sample normal direction, while equiaxed grains were observed in the top melted layer having a much weaker basal fibre texture. Solidification twinning and deformation twinning were found in the vicinity of the melt/substrate interface where the Mg grains grow larger due to the heating. In addition, no epitaxial type grain growth was observed at the melt/substrate interface.

Key words: Pure Mg, Laser surface melting, Solidification, Texture

Kemin Zhang, Jianxin Zou, Jun Li, Zhishui Yu. EBSD Characterization of the Laser Remelted Surface Layers in a Commercially Pure Mg[J]. J. Mater. Sci. Technol., DOI: 10.1016/j.jmst.2013.10.002.

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EBSD Characterization of the Laser Remelted Surface Layers in a Commercially Pure Mg

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