Fatigue crack growth of ultrafine grained pure Ti after severe plastic deformation

被引：1

作者：

Hyun, Chang-Young ^{[2
]}

Kim, Ho-Kyung ^{[1
]}

机构：

[1] Seoul Natl Univ, Dept Automot Engn, 172 Kongnung Dong, Seoul 139743, South Korea

[2] Seoul Natl Univ Technol, Dept Mat Sci & Engn, Seoul 139743, South Korea

来源：

ADVANCES IN NANOMATERIALS AND PROCESSING, PTS 1 AND 2 | 2007年 / 124-126卷

关键词：

ultrafine grained; pure Ti; fatigue crack growth; ECAP; load ratio;

D O I：

10.4028/www.scientific.net/SSP.124-126.1385

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Fatigue crack growth behavior of the ultrafine-grained pure Ti produced by ECAP was investigated. The ECAPed sample with a total strain of 4.6 showed nearly equiaxed grains with an average size of about 0.3 mu m. After ECAP, the ultimate tensile strength was increased by 60%, while the tensile elongation was decreased by 31%. The ECAPed Ti showed much higher resistance in fatigue crack growth by about a factor of 4 over the whole Delta K due to plasticity-induced crack closure.

引用

页码：1385 / +

页数：2

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