Isochronal Aging Hardening of the Mg-8Gd-3Y-0.5Zr Alloy after Cold Rolling

Abstract:

By transmission electron microscopy (TEM) and optical microscopy (OM), the isochronal aging hardening law and microstructure have been studied for the Mg-8Gd-3Y-0.5Zr alloy after cold rolling. During isochronal aging process (heated from room temperature to 500 with the heating rate of 1/min), there are two peak hardness temperature points, which are corresponding to the large number of precipitation of β and β phases, and the peak aging time of the alloy substantially decreased with the increase of deformation reduction. The β phases started to precipitate at temperatures of 145, 134, 127 and 124 in the alloy after cold rolling with the reduction of 0%, 8%, 15% and 22%. The heating rate greatly affected the starting precipitation of metastable phases. β phases started to precipitate at temperatures of 109 and 124 with the reduction of 22% and with the heating rates of 3 /min and 30 /min.

• Periodical: Materials Science Forum (Volumes 747-748)
• Pages: 333-339
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.747-748.333
• Online since: February 2013
• Authors: Yan Cai Xie, De Jiang Li, Xiao Qin Zeng, Xin Su, Wen Jiang Ding, Bin Chen
• Keywords: Aging Hardening, Cold Roll, Mg-Gd-Y-Zr Alloy, Mg-Re Alloy, Microstructure

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