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低周疲劳对快凝Al-Fe-V-Si-Nd纳米合金微结构影响
Effect of the Microstructure of Rapidly Solidified Al-Fe-V-Si-Nd Nanocrystalline Alloy Ribbon by Low-Cycles Fatigue
【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·
【Abstract】 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.
【关键词】 快速凝固;
纳米合金;
AlFeVSiNd合金;
正电子湮没;
疲劳;
微结构;
透射电镜;
【Key words】 rapid solidification; nanocrystalline alloy; Al Fe V Si Nd alloy; positron annihilation; fatigue; microstructure; TEM;
【Key words】 rapid solidification; nanocrystalline alloy; Al Fe V Si Nd alloy; positron annihilation; fatigue; microstructure; TEM;
【基金】 国家自然科学基金资助项目 (5 97710 2 0 )
- 【文献出处】 东北大学学报 ,JOURNAL OF NORTHEASTERN UNIVERSITY , 编辑部邮箱 ,2002年02期
- 【分类号】TG131
- 【下载频次】45