Texture Modification During Extrusion of Some Mg Alloys

• Published in: Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2012-06, Vol.43 (6), p.2148-2157
• Main Authors: Jin, Li, Mishra, Raja K., Sachdev, Anil K.
• Format: Article
• Language: English
• Subjects: Alloying effects; Alloys; Applied sciences; Characterization and Evaluation of Materials; Chemistry and Materials Science; Exact sciences and technology; Extrusion; Magnesium; Magnesium base alloys; Materials Science; Metallic Materials; Metals. Metallurgy; Microstructure; Nanotechnology; Physical metallurgy; Structural Materials; Surface layer; Surfaces and Interfaces; Temperature effects; Texture; Thin Films
• ISSN: 1073-5623; 1543-1940
• DOI: 10.1007/s11661-011-0994-3

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 Al 11 Ce 3 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.