Structural and Mechanical Properties of Ti-Co Alloys Treated by High Pressure Torsion

被引：25

作者：

Straumal, Boris B. ^{[1
,2
,3
,4
]}

Korneva, Anna ^{[5
]}

Kilmametov, Askar R. ^{[1
,2
,3
]}

Litynska-Dobrzynska, Lidia ^{[5
]}

Gornakova, Alena S. ^{[1
,2
]}

Chulist, Robert ^{[5
]}

Karpov, Mikhail I. ^{[1
,2
]}

Zieba, Pawel ^{[5
]}

机构：

[1] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Russia

[2] Russian Acad Sci, Chernogolovka Sci Ctr, Chernogolovka 142432, Russia

[3] Karlsruhe Inst Technol, Inst Nanotechnol, D-76344 Eggenstein Leopoldshafen, Germany

[4] Natl Univ Sci & Technol MISIS, Moscow 119049, Russia

[5] Polish Acad Sci, Inst Met & Mat Sci, PL-30059 Krakow, Poland

来源：

MATERIALS | 2019年 / 12卷 / 03期

基金：

俄罗斯基础研究基金会;

关键词：

titanium alloys; high pressure torsion; microhardness; SEVERE PLASTIC-DEFORMATION; PHASE-TRANSITIONS; TITANIUM-ALLOYS; OMEGA-PHASE; MICROSTRUCTURAL EVOLUTION; FE ALLOYS; TRANSFORMATIONS; EQUILIBRIA; COATINGS; SURFACE;

D O I：

10.3390/ma12030426

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The microstructure and properties of titanium-based alloys can be tailored using severe plastic deformation. The structure and microhardness of Ti-4 wt.% Co alloy have been studied after preliminary annealing and following high pressure torsion (HPT). The Ti-4 wt.% Co alloy has been annealed at 400, 500, and 600 degrees C, i.e., below the temperature of eutectoid transformation in the Ti-4 wt.% Co system. The amount of Co dissolved in -Ti increased with increasing annealing temperature. HPT led to the transformation of -Ti in -Ti. After HPT, the amount of -phase in the sample annealed at 400 degrees C was about 8085%, i.e., higher than in pure titanium (about 40%). However, with increasing temperature of pre-annealing, the portion of -phase decreased (60-65% at 500 degrees C and about 5% at 600 degrees C). The microhardness of all investigated samples increased with increasing temperature of pre-annealing.

引用

页数：11

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