摘要
利用金相显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)研究时效处理对亚共析U-Nb合金显微组织结构的影响。结果表明:在低于200℃温区时效,亚共析U-Nb合金的显微组织和相结构未发生变化,为α"弹性马氏体;在240℃时效,α"马氏体已部分分解为γ0相;在高温550℃时效时,马氏体沿奥氏体晶界网状分解为α+γ双相组织。
The microstructure of hypoeutectoid uranium niobium alloy treated by different heat treatment was studied by optical microscopy （OM）, scanning electron microscopy （SEM）, transmission electron microscopy （TEM） technologies. The relationship between the heat treatment and microstructure of hypoeutectoid uranium niobium alloy was discussed. The results showed that the phase structure of hypoeutectoid uranium niobium alloy did not change aging at below 200℃, which was martensite that decomposed partly into 70 at 240℃. After aging at temperature of 550℃ for two hours, the martensite discomposed into α＋γ Ttwo phases on grain boundary.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2008年第8期1396-1399,共4页
Rare Metal Materials and Engineering
关键词
亚共析U-Nb合金
热处理
显微组织
hypoeutectoid uranium niobium alloy
heat treatment
microstructure
