Deformation Behavior and Microstructural Evolution of Cu-Ag Alloys Processed by High-Pressure Torsion

被引：19

作者：

Kormout, Karoline S. ^{[1
]}

Yang, Bo ^{[1
]}

Pippan, Reinhard ^{[1
]}

机构：

[1] Austrian Acad Sci, Erich Schmid Inst Mat Sci, A-8700 Leoben, Austria

来源：

ADVANCED ENGINEERING MATERIALS | 2015年 / 17卷 / 12期

基金：

奥地利科学基金会; 欧洲研究理事会;

关键词：

SEVERE PLASTIC-DEFORMATION; SUPERSATURATED SOLID-SOLUTIONS; FE COMPOSITE; GRAIN-SIZE; STABILITY; METALS; SYSTEM; NANOCOMPOSITES; INTERFACES; DIFFUSION;

D O I：

10.1002/adem.201500109

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, different Cu-Ag alloys (Cu-10/25/50/75/90 wt% Ag) are produced by powder consolidation and subsequent high-pressure torsion processing. The microstructural evolution of the material state is investigated by SEM and TEM. Additionally, mechanical properties are characterized by Vickers microhardness measurements. The deformation mechanism changes from homogenous code-formation in the very beginning of the process to shear banding. When the hardness reaches a saturation level, all compositions show grain sizes below 100 nm with a very high defect density and hardness compared to pure ultrafine-grained Cu or Ag. Single-phase solid solutions are reached at both high and low Ag content, in the medium composition range a mixture of single-and two-phase regions is observed.

引用

页码：1828 / 1834

页数：7

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