Enhancing Strength and Maintaining Ductility of Mg-3%Li-1 %Sc Alloy by Equal Channel Angular Pressing
Equal channel angular pressing (ECAP) has been conducted on as-cast Mg-3%Li-l%Sc alloy for four-passes to study the microstructure uniformity and tensile properties. After ECAP, the microstructure become muddled, contains about 65% of deformed coarse grains with abundant low angle grain boundaries and about 35% of recrystallized small grains. Meanwhile, a strong basal texture is formed in the ECAP sample. The texture type of the recrystallized grains and the deformed grains are the same, however, the texture strength of the recrystallized grains is much lower than the deformed ones. Tensile strength is improved effectively and the elongation is maintained after ECAP. The increment of strength results from the microstructure refinement and residual dislocations produced by ECAP, while the recovery of ductility may be attributed to a shea r type texture formed in the alloy during ECAP.
H.J.Yang X.H.Shao S.X.Li S.D.Wu Z.F.Zhang
Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sc Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sc
国际会议
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)
南京
英文
839-844
2011-03-01（万方平台首次上网日期，不代表论文的发表时间）