摘要
采用正电子湮没寿命方法研究了国产改进型316L不锈钢的微结构及其温度变化。该不锈钢含有单空位、双空位、位错和小空位团等缺陷。经400、600、800℃退火后,单空位、双空位和位错缺陷分别消失。小空位团是由四空位和五空位构成的空位团。低于200℃退火时,缺陷复合五空位团成分随退火温度升高而增大;高于400℃时,空位团分裂,五空位团成分减少;800℃退火仍存在较低浓度的四空位团。
Microstructure of homemade modified 316L stainless steels and its thermal annealing behavior are studied by the positron annihilation lifetime technique. There exist monovacancies, divacancies, dislocations and small vacancy clusters in them. The monovacancies, divacancies and dislocations are annealed away at 400, 600 and 800 ℃, respectively. The observed vacancy clusters are quadrivacancies and pentavacancies. The relative intensity of pentavacancies increases with the increasing of annealing temperature below 200 ℃, dissociation takes place and the relative intensity of pentavacancies decreases above 400 ℃, and up to 800 ℃ quadrivacancies still remain with a low concentration.
出处
《原子能科学技术》
EI
CAS
CSCD
2003年第1期18-21,共4页
Atomic Energy Science and Technology
基金
国家重点基础研究发展规划资助项目(G1999022600)
国家自然科学基金资助项目(19835050)
