中文摘要：

采用冷拉拔制备了Cu-6％Ag及Cu-12％Ag纤维相复合强化合金线材，研究了组织纤维化对Cu—Ag合金强度与弹性模量的影响。随变形程度的增加，合金抗拉强度和弹性模量在明显升高后趋于饱和。Cu-12％Ag合金比Cu-6％Ag合金有更高的应变硬化速率和抗拉强度。在较低变形程度范围内，Cu-6％Ag合金的弹性模量高于Cu-12％Ag合金。在较高变形程度范围内，Cu-6％Ag合金的弹性模量低于Cu-12％Ag合金。纤维化组织中的高密度晶体缺陷使得两种Ag含量的合金弹性模量均低于理论预测值。合金的强度和弹性模量主要取决于共晶体数量、相界面密度、变形抗力及两相之间的变形协调行为。

英文摘要：

The filamentary strengthened alloys Cu-12%Ag and Cu-6%Ag were prepared by heavy cold drawing. The effect of microstructure evolution on the tensile strength and Young＇s modulus was investigated. With increasing of drawing strain, the tensile strength and Young＇s modulus of both alloys show an evident increase when drawing strain is in a certain range, and a slow increase when drawing strain is higher than a certain value. The Cu-12%Ag has higher strain hardening rate and tensile strength than the Cu-6%Ag. The Young＇s modulus of the Cu-6%Ag is higher than that of the Cu-12%Ag in the range of lower strain degree while the Young＇s modulus of the Cu-6%Ag is lower than that of the Cu-12%Ag in the range of higher strain degree. High density of crystal defects in the filamentary structure of both alloys results in lower Young＇s modulus than theoretical predicted value. The tensile strength and Young＇s modulus can strongly depend on the eutectic volume fraction, phase interface density, deformation resistance and strain compatibility condition of Cu-Ag alloys.