摘要
采用透射电子显微镜和正电子湮灭技术研究了低周疲劳过程中快凝Al Fe V Si Nd合金微结构的变化 ,发现 :经高载荷循环后晶内固溶元素析出产生偏聚体 ,且随循环次数的增加 ,偏聚体长大 ;当循环次数达到 15 0 0次后 ,随循环次数的继续增加 ,大于临界尺寸的偏聚体长大而小于临界尺寸的偏聚体重新溶解·
The variation of microstructure of rapidly solidified Al Fe V Si Nd nanocrystalline alloy ribbon during low cycles fatigue was studied by TEM and PAT(positron annihilation technology). G P zones appear and grow with the increase of cycles; After 1?500 cycles, the G P zones grow continuously with the increase of cycles when the zone size is larger than the critical size and G P zones dissolve again when the zone size is smaller than the critical size.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2002年第2期192-194,共3页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目 (5 97710 2 0 )
