Formation of the structure and properties of [beta]-type titanium alloy upon thermomechanical treatment

The rapid quenching of [beta]-type titanium alloy from 800[degrees]C and cold deformation by drawing ([epsilon] = 24%) leads to the formation of a cellular-banded structure with a cell size of 200 x 400 nm and high density of dislocations (~5 x [10.sup.14] [m.sup.-2]). During subsequent aging at 450...

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Bibliographic Details
Published in:Physics of metals and metallography 2017-01, Vol.118 (1), p.75
Main Authors: Shaboldo, O.P, Vitorskii, Ya.M, Sagaradze, V.V, Pecherkina, N.L, Skotnikova, M.A
Format: Article
Language:English
Subjects:
Analysis
Electron microscopy
Precipitation (Meteorology)
Specialty metals industry
Titanium
Titanium alloys
Online Access:Get full text
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Summary:The rapid quenching of [beta]-type titanium alloy from 800[degrees]C and cold deformation by drawing ([epsilon] = 24%) leads to the formation of a cellular-banded structure with a cell size of 200 x 400 nm and high density of dislocations (~5 x [10.sup.14] [m.sup.-2]). During subsequent aging at 450[degrees]C, the decomposition of the P-phase occurs with a heterogeneous precipitation (at dislocations) of plates of the [alpha] phase with a thickness of 10-30 nm and length of 50-100 nm. The small size and high density of a crystals (5 x [10.sup.21] [m.sup.-3]) provide a substantial increase in the strength characteristics of the alloy. Keywords: [beta]-type titanium alloy, cold deformation, aging, [alpha] phase, electron microscopy, mechanical properties, strengthening
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X17010069