Bulk nanostructured titanium fabricated by hydrostatic extrusion

被引：20

作者：

Topolski, Krzysztof ^{[1
]}

Garbacz, Halina ^{[1
]}

Pachla, Waclaw ^{[2
]}

Kurzydlowski, Krzysztof J. ^{[1
]}

机构：

[1] Warsaw Univ Technol, Fac Mat Sci & Engn, Warsaw, Poland

[2] Polish Acad Sci, Inst High Pressure Phys, Warsaw, Poland

来源：

PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 7 NO 5 | 2010年 / 7卷 / 05期

关键词：

Ti; extrusion; nanocrystallites; structure; SEVERE PLASTIC-DEFORMATION; NANOCRYSTALLINE TITANIUM; MECHANICAL-PROPERTIES; MICROSTRUCTURE; TI; RODS;

D O I：

10.1002/pssc.200983396

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The paper is concerned with the use of Hydrostatic Extrusion (HE), which is one of the methods of Severe Plastic Deformation (SPD), for grain refinement of titanium grade 2. Titanium in the form of rods was subjected to multi-stage extrusion. The aim was to optimize the HE process so as to obtain nanostructured titanium rods. The results show that it is possible to produce nanostructured Ti rods of a diameter suitable for industrial applications. The refinement to nano-sized grains is accompanied by a significant improvement of mechanical properties. The tensile strength of more than 1000MPa was achieved and the hardness increase exceeded 50%. This study was also concerned with the problem of up-scaling the dimensions of nano-refined components produced by HE. The basic condition for HE to yield nanostructured Ti is that an appropriately high accumulated strain should be applied (epsilon > 3). The results demonstrate that, by using HE, we can produce nano-Ti rods with diameters amounting to O8mm. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：1391 / 1394

页数：4

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