Grain Refinement and Dispersion Precipitation of I-Phase in Mg-Zn-Y Alloy Processed by ECAP

摘要：

Equal channel angular pressing (ECAP) has been conducted on as-extruded Mg-Zn-Y alloy containing quasicrystal phase at a temperature of 523 K. The optical images indicate that after 8 ECAP passes through route Ba, the grain size of the extruded alloy is decreased sharply; and the coarse eutectic icosahedral quasicrystal phases (I-phases) are broken and dispersed in the alloy; and the distributions of Zn and Y elements become more homogeneous. These can be attributed to the shear effect during the ECAP processing. TEM micrographs show the grain refinement, the evolution of broken and dispersed I-phases and dispersion precipitation of nano I-phases during 1-,4-and 8-pass ECAPed MgZn-Y alloy. And the mechanism of grain refinement is also discussed.

作者: Guanghui Min Hongwei Cui Qingliang Lu Pan Gao Huashun Yu

作者单位: Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials,Ministry of Educati Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials,Ministry of Educati

会议类型: 国际会议

会议名称: 5th International Conference on Nanomaterials by Severe Plastic Deformation(第五届剧烈塑性变形纳米材料国际会议)

会议地点: 南京

会议语种:英文

页码: 593-598

在线出版日期: 2011-03-01（万方平台首次上网日期，不代表论文的发表时间）