Ultrafine grained titanium sheets with high strength and high corrosion resistance

被引：102

作者：

Kim, Hye Sung ^{[1
]}

Yoo, Seong Jin ^{[2
]}

Ahn, Jin Woo ^{[1
]}

Kim, Doo Hyun ^{[1
]}

Kim, Woo Jin ^{[2
]}

机构：

[1] Hongik Univ, Dept Mat Sci & Engn, Seoul 121791, South Korea

[2] Pusan Natl Univ, Coll Nanosci & Nanotechnol, Dept Nanomat Engn, Miryang Si 627706, Kyongnam, South Korea

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2011年 / 528卷 / 29-30期

关键词：

Mechanical characterization; Grain refinement; Orientation relationships; Bulk deformation; High-ratio differential speed rolling; Corrosion resistance; MECHANICAL-PROPERTIES; NANOCRYSTALLINE MATERIALS; PLASTIC-DEFORMATION; ROOM-TEMPERATURE; MICROSTRUCTURE; TI; BEHAVIOR;

D O I：

10.1016/j.msea.2011.07.074

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The pure titanium sheets with ultrafine grained (UFG) microstructures were produced by high-ratio differential speed rolling (HRDSR) at different roll speed ratios and different roll temperatures. Significant strengthening was achieved after HRDSR and the sample processed at a higher speed ratio or a lower processing temperature yielded a higher strength. The strengthening mechanism in the HRDSR processed Ti was examined in terms of the models based on the critical stress for activating the Frank-Read source and the grain-size strengthening. The UFG Ti exhibited high corrosion resistance in H(2)SO(4) and HCl solutions. The corrosion rate decreased linearly with the inverse square root of the grain size. The Ti with the smallest grain size, which was HRDSR processed at room temperature, revealed the best combination of high strength and high corrosion rate. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：8479 / 8485

页数：7

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