Deformation efficiency, homogeneity, and electrical resistivity of pure copper processed by constrained groove pressing

被引：16

作者：

Wang, Zong-Shen ^{[1
]}

Guan, Yan-Jin ^{[1
]}

Liang, Ping ^{[1
]}

机构：

[1] Shandong Univ, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Peoples R China

来源：

RARE METALS | 2014年 / 33卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Constrained groove pressing; Processing efficiency; Strain homogeneity; Electrical resistivity; SEVERE PLASTIC-DEFORMATION; GRAIN-REFINEMENT; SHEETS; MICROSTRUCTURE; ALUMINUM; BEHAVIOR;

D O I：

10.1007/s12598-013-0200-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Constrained groove pressing (CGP) is a new severe plastic deformation method suitable for producing ultra-fine grained sheet metals. In this work, the processing efficiency for a muti-pass CGP of pure copper was investigated. With a relatively small groove width of 2 mm and tight constraint, a sharp variation of mechanical properties with pass number is observed. Subgrains with the size of similar to 0.5 mu m have distinct boundaries, which is the predominant feature in the microstructure after three passes. The evolution of deformation homogeneity characterized by micro-hardness distribution was examined in detail. Observations of optical micrographs and fracture surface morphology confirm the evolution rule. The relation between electrical resistivity and accumulative plastic strain was discussed. Crystalline defects, micro-cracks, and microstructure uniformity together determine the change of electrical resistivity of CGP copper.

引用

页码：287 / 292

页数：6

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