Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第13卷    第3期    总第54期    2003年6月

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文章编号:1004-0609(2003)03-0658-04
Cu-Fe-Cr原位复合材料的纤维相结构
孙世清1,2, 郭志猛2, 殷 声2  

(1. 河北科技大学 材料科学与工程学院, 石家庄 050054; 
2. 北京科技大学 材料科学与工程学院, 北京 100083
)

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=1.67)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100nm), 通过亚单元共同的[1-10]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。

 

关键词: Cu-Fe-Cr原位复合材料; 选择腐蚀; Fe-Cr纤维; 亚单元; 织构

Microstructure of filaments extracted
from Cu-Fe-Cr in situ composite
SUN Shi-qing1,2, GUO Zhi-meng2 , YIN Sheng2

1. School of Materials Science and Engineering,
Hebei University of Science and Technology,Shijiazhuang 050054, China; 
2. School of Materials Science and Engineering,
University of Science and Technology Beijing,Beijing 100083, China

Abstract: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 100nm) parallel subunits. These subunits are separated by distinct grain boundaries. Relative misorientations across the grain boundaries were obtained by imaging with the common [1-10] diffraction. The misorietation angles range from 3°to 15°.

 

Key words: Cu-Fe-Cr in situ composite; selective etching; Fe-Cr filament; subunit; t

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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