摘要
采用高能离子加速器和超高压电镜连接装置 ,研究注入He后电子辐照和同时辐照 (He+ e-)低活性Fe Cr Mn(W ,V)合金焊接热影响区 (HAZ)损伤组织特点 ,测定He对损伤组织内晶界附近合金元素浓度变化的影响。实验结果表明 :He强烈促进辐照初期位错环和位错密度增加 ,促进HAZ辐照空洞核心形成及空洞肿胀增大。He有效抑制HAZ内晶界附近Cr、Mn浓度降低 ,对Ni,Si,V ,W元素浓度变化也有抑制作用。Fe Cr Mn(W ,V)
The effect of helium on the irradiaion damage characteristics and radiation induced segregation at grain boundaries in the welding heat affected zone(HAZ) of Fe-Cr-Mn(W,V) alloy for fusion-fission mixed reactor was investigated by super-high voltage electron microscopy connected with a high energy ion accelerator. Experimental results show that the existence of helium enhanced the density of dislocation loop during initial irradation stage and promoted formation of void nuclei and increase of void swelling, effectively suppressed concentration decrease of solute atoms Cr,Mn at grain boundaries meanwhile the concentration change of Ni,V,Si,W at grain boundary is also suppressed. The HAZ of Fe-Cr-Mn(W,V) alloy has superior resistance to irradiation damage under helium atmosphere.
出处
《核科学与工程》
CSCD
北大核心
2003年第1期61-67,共7页
Nuclear Science and Engineering
