稀土元素La对AlMgSi合金性能和微结构的影响

郑雄, 赖玉香, 向雪梅, 陈江华

Impacts of Rare Earth Element La on Properties and Microstructure of AlMgSi Alloys

ZHENG Xiong, LAI Yuxiang, XIANG Xuemei, CHEN Jianghua

图7 Al-Mg-Si合金中3种析出相结构示意图及有无La添加的合金2种时效状态典型析出相的HAADF-STEM像

Fig.7 Schematics of the unit cell of β", β', and U2 (a), and HAADF-STEM images of 0La (b, f) and 0.4La alloys (c-e, g-i) peak-aged (b-e) and 96 h-aged (f-i) at 180oC (Cyan circle, orange and red hexagons depict the sub-unit(s) of β", β', and U2, respectively; z—fractional coordinate of atoms along precipitates' longest dimension; LDC—low density cylinder; a, b, c—lattice parameters)