Effects of Sc content on the mechanical properties of Al-Sc alloys
Effects of Sc content on the mechanical properties of Al-Sc alloys作者机构:State Key Laboratory of Powder Metallurgy Central South University Changsha China
出 版 物:《Rare Metals》 (稀有金属(英文版))
年 卷 期:2010年第29卷第5期
页 面:451-455页
核心收录:
学科分类:08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程(可授工学、理学学位)]
基 金:supported by the National Natural Science Foundation of China(Nos.50831007,50823006,and 50825102) the Natural Science Foundation of Hunan Province,China(No.07JJ3117)
主 题:aluminum alloys scandium mechanical properties microstructure
摘 要:The effects of Sc content on the mechanical properties of Al-Sc alloys were investigated. The results show that the strengths of all the tested alloys with 0.1 wt.%, 0.3 wt.%, and 0.4 wt.% Sc additions increase initially with an increase in annealing time, due to the increase in volume fraction and size and the decrease in particle interspacing of Al3Sc particles. After reaching peak values, the strengths of all the tested alloys start to decrease with increasing annealing time due to the coarsening and increase in particle interspacing of At3Sc particles. It has also been shown that the alloy with 0.3 wt.% Sc has a higher strength and a lower elongation than the alloys with 0.1 wt.% and 0.4 wt.% Sc. The increase in strength and the decrease in elongation of the alloy with 0.3 wt.% Sc are due to the smaller particle interspacing of Al3Sc particles, resulting in a strong inhibition of dislocation movement during deformation.