摘要
通过感应熔炼和冷拔变形制备了Cu 16Fe 2Cr原位复合材料 ,将铜基体选择腐蚀后提取出了纤维 ,采用SEM和TEM观察分析了纤维相结构。在较低的应变量 (η =1.6 7)时 ,纤维不均匀 ,随着变形量的增大 (η =5 .42 ) ,纤维外形变得均匀。在 η =5 .42时 ,一个显著的特点是单根Fe Cr纤维分为一些由晶界隔开的平行亚单元 (宽度约为 10 0nm) ,通过亚单元共同的 [110 ]衍射获得了晶粒之间的相对取向 ,相邻晶粒的取向角在 3°～ 15°之间。
Cu-16Fe-2Cr in situ composites were manufactured by inductive melting and cold drawing. The filaments were extracted by use of a selective etching technique, and then the morphologies of isolated filaments were characterized by SEM and TEM. At lower drawing strains(η=1.67), Fe-Cr filaments morphology appears inhomogeneous. After higher amounts of deformation(η=5.42), the filaments have a more uniform shape. At η=5.42, the striking feature of a single filament is that it is divided into narrow(approximately 100 nm) parallel subunits. These subunits are separated by distinct grain boundaries. Relative misorientations across the grain boundaries were obtained by imaging with the common 10] diffraction. The misorietation angles range from 3° to 15°. diffraction. The misorietation angles range from 3° to 15°.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2003年第3期658-661,共4页
The Chinese Journal of Nonferrous Metals
基金
河北省自然科学基金资助项目 (5 98191)
河北科技大学校立基金资助项目 (XL2 0 0 2 5 9)
