摘要
采用硼（Ｂ）径迹照相法和透射电镜从实验上观察了连续冷却过程中Ｂ在晶界非平衡偏聚的发生发展过程。测定了晶界偏聚的富集因子、富集带宽度、贫Ｂ区宽度和贫化因子等偏聚特征参量 实验结果表明，对于Ｂ含量（质量分数）为１０×１０－４％的 Ｆｅ－４０％Ｎｉ合金体系，以 ２℃／ｓ的冷速从 １１５０ ℃冷却到 ６４０℃的时候，Ｂ在晶界上的偏聚经历了 ３段式的发展．并在８６０ ℃时开始向非平衡析出转化。
The process of boron segregating to grain boundaries in Fe-40%Ni alloy during continuous cooling process was observed experimentally with boron autoradiograph technique and transmission electron microscope. The non-equilibrium segregation of boron on grain boundaries experienced three stages when the samples were cooled from 1150 degreesC to 640 degreesC at 2 degreesC /s, and transformed to boron precipitates at 860 degreesC. The rich factors, widths of rich layer, depletion factors and widths of boron depletion zone were measured. To explain the experiment phenomena, the absorption of grain boundary and extended disordered layer to the solute atoms are suggested.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第1期6-10,共5页
Acta Metallurgica Sinica
基金
国家重点基础研究发展规划(973)资助项目G19980601507
关键词
硼
晶界
非平衡偏聚
冷却
boron
grain boundary
non-equilibrium segregation
