摘要
从材料的晶体结构出发,研究了双相不锈钢超塑性变形的机理.利用背散射电子衍射花样分析系统(EBSD),获得了双相不锈钢变形过程中的ODF图、极图和取向与转轴分布等晶体取向分布规律.结合透射电镜对微观组织的观察结果进行了综合分析.研究表明,双相不锈钢超塑性变形的机理为形变诱导析出和动态再结晶、晶界滑移以及变形中的晶粒转动.
The superplasticity mechanism of duplex stainless steels was studied mainly by means of crystallography. On this basis, the Electron Back Scatter Diffraction (EBSD) system was used to obtain the orientation distribution, Tango-mapping and Mambo-pole figures. Microstructural studies associated with transmission electron micrographs observed in the specimens during superplastic deformation suggest that superplastic process occurs mainly by strain-induced phase transformation and dynamic recrystallization, grain boundary sliding and grain re-orientation mechanism.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2005年第1期68-71,共4页
Journal of University of Science and Technology Beijing
基金
北京市科委基金资助项目(No.9550310900)
关键词
超塑性
织构
相变
取向
Backscattering
Crystal microstructure
Crystal orientation
Crystallography
Deformation
Grain boundaries
Phase transitions
Recrystallization (metallurgy)
Superplasticity
Textures
Transmission electron microscopy
