Microstructure evolution in nanocrystalline Cu-Nb alloy during mechanical alloying

被引:3
作者
雷若姗
汪明朴
郭明星
李周
董琦祎
机构
[1] Changsha 410083
[2] China
[3] School of Materials Science and Engineering Central South University
关键词
mechanical alloying; nanocrystalline material; Cu-Nb alloy; microstructure;
D O I
暂无
中图分类号
TB383.1 [];
学科分类号
070205 ; 080501 ; 1406 ;
摘要
The microstructural evolution of nanocrystalline Cu-10%Nb(mass fraction) alloy during mechanical alloying(MA) was investigated by using X-ray diffraction,optical microscopy(OM),scanning electron microscopy(SEM) and transmission electron microscopy(TEM) observation. Upon milling of Cu-Nb powders with coarse grains,the grain size is found to decrease gradually with lengthening milling time,and reach the minimum value(about 9 nm) after 100 h milling. The microstrain and the microhardness of the powders increase during the grain refinement. And Cu lattice parameter increases steadily over 100 h milling. The mechanisms of solid solution extension during milling were discussed. The results show that up to 10%Nb can be brought into solid solution by MA. The extension of solid solution is found to relate closely with the formation of nanocrystalline.
引用
收藏
页码:603 / 607
页数:5
相关论文
共 6 条
[1]  
Mechanical and electrical properties of mechanically alloyed nanocrystalline Cu–Nb alloys[J] . E. Botcharova,J. Freudenberger,L. Schultz.Acta Materialia . 2006 (12)
[2]  
Formation of the microstructure in Cu-Nb alloys[J] . J. Freudenberger,E. Botcharova,L. Schultz.Journal of Materials Science . 2004 (16)
[3]   Paradox of strength and ductility in metals processed by severe plastic deformation [J].
Valiev, RZ ;
Alexandrov, IV ;
Zhu, YT ;
Lowe, TC .
JOURNAL OF MATERIALS RESEARCH, 2002, 17 (01) :5-8
[4]   Microsample tensile testing of nanocrystalline metals [J].
Legros, M ;
Elliott, BR ;
Rittner, MN ;
Weertman, JR ;
Hemker, KJ .
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 2000, 80 (04) :1017-1026
[5]   The influence of collision energy and strain accumulation on the kinetics of mechanical alloying [J].
Schaffer, GB ;
Forrester, JS .
JOURNAL OF MATERIALS SCIENCE, 1997, 32 (12) :3157-3162
[6]  
X-Ray Line Broadening from Field Aluminium and Wolfram. Williamson G K, Hall W H. Acta Materialia . 1953