Equal-Channel Angular Pressing and High-Pressure Torsion of Pure Copper: Evolution of Electrical Conductivity and Hardness with Strain

被引：83
作者：
Edalati, Kaveh [1 ,2 ]
Imamura, Kazutaka [3 ]
Kiss, Takanobu [3 ]
Horita, Zenji [1 ,2 ]
机构：
[1] Kyushu Univ, Dept Mat Sci & Engn, Fac Engn, Fukuoka 8190395, Japan
[2] Kyushu Univ, WPI, Int Inst Carbon Net Energy Res I2CNER, Fukuoka 8190395, Japan
[3] Kyushu Univ, Dept Elect Engn, Fac Engn, Fukuoka 8190395, Japan
来源：
MATERIALS TRANSACTIONS | 2012年 / 53卷 / 01期
关键词：
severe plastic deformation; equal-channel angular pressing; high-pressure torsion; ultrafine grain; electrical conductivity; STACKING-FAULT ENERGY; MECHANICAL-PROPERTIES; HIGH-STRENGTH; MICROSTRUCTURAL EVOLUTION; DEFORMATION-BEHAVIOR; TENSILE BEHAVIOR; HOMOGENEITY; ALUMINUM; METALS;
D O I：
10.2320/matertrans.MD201109
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Pure Cu (99.99%) is processed by equal-channel angular pressing (ECAP) and by high-pressure torsion (H PT). The electrical resistivity as well as the microhardness increases with an increase in the equivalent strain at an early stage of straining, but saturates to a steady state at the equivalent strains more than similar to 20. At the steady state, the samples processed by ECAP and HPT show a significant increase in the hardness (similar to 270%) but little decrease in the electrical conductivity (similar to 12%) when compared to the annealed state. Transmission electron microscopy confirms that the microstructure does not change at the saturated level with further straining. Evolutions of hardness, electrical conductivity and microstructures are also investigated after post-HPT annealing. [doi:10.2320/matertrans.MD201109]
引用
收藏
页码：123 / 127
页数：5
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