Dislocation structure and crystallite size distribution in plastically deformed Ti determined by X-ray peak profile analysis

被引:15
作者
Gubicza, J
Dragomir, IC
Ribárik, G
Baik, SC
Zhu, YT
Vailev, RZ
Ungár, T
机构
[1] Eotvos Lorand Univ, Dept Gen Phys, H-1518 Budapest, Hungary
[2] Eotvos Lorand Univ, Dept Solid State Phys, Budapest, Hungary
[3] Tech Univ Clausthal, Inst Mat Engn & Technol, D-3392 Clausthal Zellerfeld, Germany
[4] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA
[5] Ufa State Aviat Tech Univ, Inst Phys Adv Mat, Ufa, Russia
来源
ZEITSCHRIFT FUR METALLKUNDE | 2003年 / 94卷 / 11期
关键词
crystallite size distribution; dislocation structure; Ti; severe plastic deformation; X-ray peak profile analysis;
D O I
10.3139/146.031185
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
Ultrafine-grained titanium produced by equal channel angular pressing and subsequent cold rolling is studied by Xray diffraction. It is found that a texture exists in which the hexagonal basal planes are parallel to the longitudinal axis of the billet. The crystallite size distribution and the dislocation structure are determined by X-ray diffraction peak profile analysis. The median and the variance of the crystallite size distribution are obtained as m = 39 nm and sigma = 0.14, respectively. The dislocation model of anisotropic broadening of peak profiles enables to determine the active slip systems. It was found that all three possible hexagonal Burgers vectors of dislocations exist, with the composition of 66% <a> type, 33% <c> type and 1% <c + a> type.
引用
收藏
页码:1185 / 1188
页数:4
相关论文
共 30 条