Deformation Structures of Pure Titanium during Shear Deformation

被引：64

作者：

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

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

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

Dumoulin, S. ^{[2
]}

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

机构：

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

[2] SINTEF, Mat & Chem, N-7491 Trondheim, Norway

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2010年 / 41A卷 / 04期

关键词：

MICROSTRUCTURE EVOLUTION; ALLOY; RECRYSTALLIZATION; NANOSTRUCTURES; TEMPERATURE; DISLOCATION; ECAP; AZ31; EBSD; CU;

D O I：

10.1007/s11661-009-0040-x

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The deformation microstructure of commercial pure (CP) titanium formed in the theoretical shear zone of an equal channel angular pressing (ECAP) die during 3 or 4 passes is investigated by electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). The typical feature of the microstructure is that ultra. ne grains coexist with coarse elongated grains with a high density of low-angle grain boundaries (LAGBs). Dislocation tangle zones (DTZs), dislocation cells (DCs), and subgrains are generated during shear deformation. The primary twin type has been found to be {10 (1) over bar2}. Grain refinement appears to progress by continuous dynamic recrystallization (CDRX), in which dislocation movement to LAGBs leads to their evolution into high-angle grain boundaries (HAGBs).

引用

页码：787 / 794

页数：8

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