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.
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页数：11
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