Microstructure of severely deformed metals determined by X-ray peak profile analysis

被引：73

作者：

Gubicza, J

Nam, NH

Balogh, L

Hellmig, RJ

Stolyarov, VV

Estrin, Y

Ungár, T

机构：

[1] Eotvos Lorand Univ, Dept Gen Phys, H-1117 Budapest 1518, Hungary

[2] Eotvos Lorand Univ, Dept Solid State Phys, H-1117 Budapest 1518, Hungary

[3] Tech Univ Clausthal, Inst Mat Engn & Technol, Clausthal Zellerfeld, Germany

[4] Ufa State Aviat Tech Univ, Inst Phys Perspect Mat, Ufa, Russia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2004年 / 378卷 / 1-2期

关键词：

metals; dislocations; X-ray diffraction;

D O I：

10.1016/j.jallcom.2003.11.162

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Two essentially different metals, fee copper and hexagonal titanium, were deformed by equal channel angular pressing (ECAP) up to eight passes. The microstructure developed as a result of severe plastic deformation (SPD) was studied by X-ray peak profile analysis. The formation of submicron grain sized structures was studied as a function of the number of ECAP passes. Thermal stability of the microstructure in both copper and titanium was examined by differential scanning calorimetry (DSC). During the isothermal heat-treatment of copper a bi-modal microstructure was formed, as manifested in a special shape of the peak profiles. In titanium, a considerable fraction of dislocations gets annihilated at temperatures well below the exothermic peak in the DSC curve. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：248 / 252

页数：5

共 22 条

[1] Calculation of deformation behavior and texture evolution during equal channel angular pressing of IF steel using dislocation based modeling of strain hardening [J].