摘要
利用透射电子显微术(TEM),对Fe-Ni-Nb-Ti-C合金变形后等温弛豫过程中的位错结构变化以及应变诱导析出行为进行了观察分析。结果表明:变形过程中产生的高密度、分布混乱的位错,通过位错重组和多边形化过程,逐渐形成较为完整的位错胞状结构。应变诱导析出阻碍了位错的演变发展过程。在弛豫阶段后期(大约200s),位错大部分脱离钉扎,位错胞演化成为尺寸较大的亚晶结构。
Transmission electron microscopy(TEM) was applied to investigate the evolution of dislocation configuration and strain induced precipitation behavior during relaxation process after deformation in Fe-Ni-Nb-Ti-B alloy. The results indicated that the dislocation density is very high and distributed confusedly in no relaxed specimen. With the relaxation time increasing ,the integrated dislocation cell formed gradually by way of dislocation interaction and polygonization process. The strain-induced precipitation retards the progress of dislocation variation. In the final relaxation stage(about 200s), most dislocations get rid of precipitates and the cell has developed into subgrain in large size.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2003年第6期834-835,共2页
Journal of Liaoning Technical University (Natural Science)
基金
中信-CBMM铌钢研究与开发项目(2002RMJS-KY002)
