The effect of grain size on storage and distribution of defects at plastic deformation of polycrystalline FCC alloys based on copper

被引：0

作者：

Koneva, N. A. ^{[1
]}

Kozlov, E. V. ^{[1
]}

Trishkina, L. I. ^{[1
]}

机构：

[1] Tomsk State Univ Architecture & Bldg, Tomsk 634003, Russia

来源：

KOVOVE MATERIALY-METALLIC MATERIALS | 2015年 / 53卷 / 04期

关键词：

alloys; polycrystal; grains; grain boundaries; deformation; defects; DISLOCATION DENSITY;

D O I：

10.4149/km_2015_4_207

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The defect structure forming during deformation of the fcc polycrystalline solid solution Cu-Al and Cu-Mn with different grain sizes (10-240 mu m) was studied by TEM. Plastic deformation of the alloy samples was carried out in tension at rate of 2 x 10(-2) sec(-1) at the temperatures of 293-573 K. The scalar dislocation density and its components (the density of geometrically necessary dislocations and the density of statistically stored dislocations), the size of dislocation cells and the curvature-torsion crystalline lattice were measured. Both the average parameters of all the samples and the local ones were determined at various distances from the grain boundaries. The study showed the presence of a hardened zone near the grain boundaries, the size of which decreases with a decreasing grain size.

引用

页码：207 / 211

页数：5

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