用SAXS研究1420合金时效-回归-再时效析出δ′相  

SAXS Investigation the Precipitation of δ′ Phase in 1420 Alloy Treated by Aging-retrogression-reaging

作　　者：孟繁玲[1] 李永华[2] 刘常升[1] 徐跃[3] 王煜明[4] 

机构地区：[1]东北大学材料与冶金学院,沈阳110004 [2]哈尔滨工程大学理学院,哈尔滨150001 [3]吉林大学测试科学实验中心,长春130021 [4]吉林大学材料科学与工程学院,长春130012

出　　处：《吉林大学学报（理学版）》2008年第5期971-973,共3页Journal of Jilin University:Science Edition

基　　金：中国博士后科学基金(批准号:2006039043220060390969)

摘　　要：应用小角X射线散射(SAXS)技术研究1420合金时效-回归-再时效析出δ′相的行为.结果表明,再时效处理5 h后析出的δ′相与基体间存在明显的过渡界面层,再时效48 h后过渡界面层消失,时效80 h和再时效80 h析出δ′相的回转半径分别为9.32 nm和8.27 nm.再时效过程中δ′相粒子的长大速度比回归前慢,随着再时效时间的增加,粒子非均匀长大.Small-angle X-ray scattering （SAXS） was used to study the precipitation behavior of the δ＇ phase in 1420 alloy treated by aging-retrogression-reaging. The results show that the transition interfacial layer exists between the δ＇ phase and the matrix after reaging for 5 h, but the transition interracial layer disappears after reaging for 48 h. The gyration radius of the δ＇ phase particles, RG was 9.32 nm for aging 80 h and 8.27 nm for reaging 80 h, respectively. This suggests that the δ＇ phase particles coarsen is much slower during reaging treatment compared with that of aging treatment. With the reaging time increase, the δ＇ phase grain size is not the same.

关 键 词：AL-LI合金 时效-回归-再时效 回转半径 小角X射线散射 

分 类 号：TG113.12[金属学及工艺—物理冶金]