Effect of High-Pressure Torsion on Structure and Microhardness of Ti/TiB Metal-Matrix Composite

被引：13

作者：

Zherebtsov, Sergey ^{[1
]}

Ozerov, Maxim ^{[1
]}

Stepanov, Nikita ^{[1
]}

Klimova, Margarita ^{[1
]}

Ivanisenko, Yulia ^{[2
]}

机构：

[1] Belgorod State Univ, Lab Bulk Nanostruct Mat, Belgorod 308015, Russia

[2] Karlsruhe Inst Technol, Inst Nanotechnol, D-76021 Karlsruhe, Germany

来源：

METALS | 2017年 / 7卷 / 11期

基金：

俄罗斯科学基金会;

关键词：

metal-matrix composite; high-pressure torsion; microstructure evolution; microhardness; SEVERE PLASTIC-DEFORMATION; MECHANICAL-PROPERTIES; STRENGTHENING MECHANISMS; TENSILE PROPERTIES; POWDER-METALLURGY; CARBON NANOTUBES; MICROSTRUCTURE; TITANIUM; TI; NANOCOMPOSITES;

D O I：

10.3390/met7110507

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Effect of high-pressure torsion (HPT) at 400 degrees C on microstructure and microhardness of a Ti/TiB metal-matrix composite was studied. The starting material was produced by spark plasma sintering of a mixture of a pure Ti and TiB2 (10 wt %) powders at 1000 degrees C. The microstructure evolution during HPT was associated with an increase in dislocation density and substructure development that resulted in a gradual microstructure refinement of the Ti matrix and shortening/redistribution of TiB whiskers. After five revolutions, a nanostructure with (sub) grain size of similar to 30 nm was produced in Ti matrix. The microhardness increased with strain attaining the value similar to 520 HV after five revolutions. The contribution of different hardening mechanisms into the hardness of the Ti/TiB metal-matrix composite was quantitatively analyzed.

引用

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页数：12

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