Nanocrystallization and Dissolution of Immiscible Powder Alloys Using High Pressure Torsion

被引：1

作者：

Kahofer, S. ^{[1
,2
]}

Zehetbauer, M. J. ^{[1
]}

Danninger, H. ^{[2
]}

Schafler, E. ^{[1
]}

Kerber, M. ^{[1
]}

Horky, J. ^{[1
]}

机构：

[1] Univ Vienna, Fac Phys, Boltzmanngasse 5, A-1090 Vienna, Austria

[2] Vienna Univ Technol, Inst Chem Technol & Analyt, A-1060 Vienna, Austria

来源：

NANOMATERIALS BY SEVERE PLASTIC DEFORMATION: NANOSPD5, PTS 1 AND 2 | 2011年 / 667-669卷

关键词：

High Pressure Torsion; immiscible systems; consolidation; nanocrystallization; compacts; DEFORMATION;

D O I：

10.4028/www.scientific.net/MSF.667-669.151

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Precompacts out of immiscible systems CuCr (75/25 wt%) and WCu (80/20 wt%), respectively, were made by pressing mixed powders and sintering. By applying different strains and hydrostatic pressures of HPT at room temperature, disc-shaped samples with a diameter of 8 mm were produced. They were investigated by Light Microscopy, Scanning-Electron Microscopy using Back-Scattered Electrons, and X-ray Line Profile Analysis. In addition, Vickers microhardness data were collected. Both systems showed the highest microhardness at a shear strain of about gamma = 170. The density (for the case of Cu25Cr) of the consolidated material could be increased to the theoretical value. Microhardness and grain sizes were studied individually for each of the phases, too.

引用

页码：151 / +

页数：2

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