Microstructure evolution of commercial pure titanium during equal channel angular pressing

被引：87

作者：

Chen, Y. J. ^{[1
]}

Li, Y. J. ^{[2
]}

Walmsley, J. C. ^{[2
]}

Dumoulin, S. ^{[2
]}

Skaret, P. C. ^{[1
]}

Roven, H. J. ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Mat Sci & Engn, N-7491 Trondheim, Norway

[2] SINTEF, N-7465 Trondheim, Norway

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 03期

关键词：

Electron backscatter diffraction (EBSD); Equal channel angular pressing (ECAP); Commercially pure (CP) Ti; Continuous dynamic recrystallization (CDRX); Grain boundary; GRAIN-REFINEMENT; TI; DEFORMATION; EXTRUSION; ECAP; NANOSTRUCTURES; ALLOYS; SPD;

D O I：

10.1016/j.msea.2009.09.005

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The microstructure development of commercially pure titanium during 3 and 4 passes of equal channel angular pressing (ECAP) has been investigated in detail by optical microscopy and electron backscattered diffraction (EBSD). The flow line, texture, grain, subgrain and twinning structures along the whole length of the ECAP bar have been characterized systematically. A theoretically predicted triangular zone with a completely different flow line pattern and texture has been found at the extruded end of the sample. Details of the misorientation gradient inside grains and the continuous dynamic recrystallization (CDRX) mechanism are discussed. Low angle grain boundaries (LAGBs) in grains are seen to evolve into high angle grain boundaries (HAGBs) throughout the material. No (10 (1) over bar1) twinning was detected but a low fraction of (10 (1) over bar2) twins was present. (c) 2009 Elsevier B.V. All rights reserved.

引用

页码：789 / 796

页数：8

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