Influence of implantation on the grain size and structural-phase state of UFG-titanium

Alisa Nikonenko, Natalya Popova, Elena Nikonenko, Mark Kalashnikov, Irina Kurzina

Результат исследований: Материалы для книги/типы отчетовМатериалы для конференции

Аннотация

Transmission electron microscopy (TEM) investigations were carried out to study the structural-phase state of ultra-fine grained (UFG) titanium with the average grain size of ∼0.2 and 0.3 μm, implanted with aluminium ions. MEVVA-V.RU ion source was used for ion implantation under room temperature, exposure time of 5.25 h, at ion implantation dosage of 1×1018 ion/cm2. UFG-titanium was obtained by means of multiple uniaxial compacting with multipass rolling in grooved rolls and further annealing at 573 K during 1 hour to reach the average grain size of ∼0.2 μm, and annealing at 623 K during 1 hour to reach the size of ∼0.3 μm. The study revealed that in alloy with the average grain size of ∼0.2 μm implantation results in a decrease in longitudinal grain size of α-Ti (from 1.9 to 0.7 μm), however lateral size in its turn changed insignificantly (from 0.15 to 0.12 μm). Grain anisotropy factor decreased by 3 times. In the alloy with the average grain size of ∼0.3 μm both longitudinal and lateral grain sizes decreased (from 0.33 to 0.19 μm and from 2.1 to 0.8 μm correspondingly). The studies also showed that implantation of titanium with aluminium has led to the formation of a number of phases, such as: β-Ti, TiAl3, Ti3Al, TiC and TiO2. Their places of concentration, sizes, distribution density and volume ratios were determined. TiAl3 and Ti3Al phases were established to be ordered ones, formed within the conditions of ion exposure along the boundaries of α-Ti grains. Conducted calculations demonstrated that implantation contributed to the alloy strengthening, i.e. in alloy with the average grain size of ∼0.2 μm the value of yield stress increased by 2 times, and in the alloy with the average grain size of ∼0.3 μm - by 4 times.

Язык оригиналаАнглийский
Название основной публикацииProceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2019
РедакторыVictor E. Panin, Sergey G. Psakhie, Vasily M. Fomin
ИздательAmerican Institute of Physics Inc.
ISBN (электронное издание)9780735419124
DOI
СостояниеОпубликовано - 19 ноя 2019
СобытиеInternational Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2019 - Tomsk, Российская Федерация
Продолжительность: 1 окт 20195 окт 2019

Серия публикаций

НазваниеAIP Conference Proceedings
Том2167
ISSN (печатное издание)0094-243X
ISSN (электронное издание)1551-7616

Конференция

КонференцияInternational Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2019
СтранаРоссийская Федерация
ГородTomsk
Период1.10.195.10.19

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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