Effect of low temperature thermomechanical treatment on the phase composition and properties of a two-phase titanium alloy

Stepanov, S. I.; Илларионов, А. Г.; Демаков, С. Л.; Степанова, Е. Д.

doi:10.1063/1.4967141

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…The alloy is capable of cold working after quenching [2,3]. However, the power of cold working depends on the phase and structural conditions, which mainly determine the ductility of the alloy.…”

Section: Introductionmentioning

confidence: 99%

Fracture surface analysis of a quenched (α+β)-metastable titanium alloy

Илларионов¹,

Stepanov²,

Демаков³

2017

AIP Conference Proceedings

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Abstract. Fracture surface analysis is conducted by means of SEM for VT16 titanium alloy specimens solution-treated at temperatures ranging from 700 to 875 °C, water-quenched and subjected to tensile testing. A cup and cone shape failure and dimple microstructure of the fracture surface indicates the ductile behavior of the alloy. Dimple dimensions correlated with the β-grain size of the alloy in quenched condition. The fracture area (namely, the size; the cup and cone shape) depends on the volume fraction of the primary α-phase in the quenched sample. However, the fracture surface changes considerably when the strain-induced β-αʺ-transformation takes place during tensile testing, resulting in the increase of alloy ductility.

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Section: Introductionmentioning

confidence: 99%

Fracture surface analysis of a quenched (α+β)-metastable titanium alloy

Илларионов¹,

Stepanov²,

Демаков³

2017

AIP Conference Proceedings

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“…This considerably affects the mechanical properties of metallic materials, whose structure is evolving in the course of diffusionless phase transformation, mainly martensitic. Currently, a significant interest in the morphological and crystallographic features of structures formed in diffusionless transformation is driven by the possibility of significant dispersion hardening [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

The Spectrum of Crystallographic Misorientations of Intercrystalline Boundaries for BCC-HCP Phase Transformation in Additively Manufactured Ti-6Al-4V

Редикульцев

Stepanov

Лобанов

2021

DDF

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Electron backscatter diffraction is a modern experimental method for local structure and texture investigation, which makes it possible to establish the presence and types of the various boundaries between the elements of the mesostructure such as low or high angle, special and interphase boundaries. Moreover, this technique can demonstrate the migration of boundaries during structural and phase transformations. This study estimated the possible spectrum of crystallographic misorientations of intercrystalline boundaries in additively manufactured titanium alloy Ti-6Al-4V using orientation microscopy and crystallographic calculations based on Burgers orientation relationship during β→α-transformation. The study has established that the boundaries between grains of α-phase are characterized by the misorientation angles of 11±2 °, 61±5 °, 89±3 °. The majority of high-angle boundaries are characterized by misorientation angles in the range of 57-65 °. The study also ascertained that the experimental spectrum of intercrystalline boundaries in the α-phase reveals the displacive nature of β→α-transformation in titanium alloys.

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Effect of Thermomechanical Treatment Parameters on Structure, Phase Composition and Mechanical Properties of Ti-3Al-5Mo-4.5V Titanium Alloy

Илларионов

Stepanov

Демаков

2020

IOP Conf. Ser.: Mater. Sci. Eng.

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The structure, phase composition and mechanical properties of (α+β) — titanium alloy solution treated at 850 °C, cold-rolled at the reduction ratio in the range of 0… 45%, followed by ageing at 450, 500, 550 °C for 0.5, 1.5, 3 hours was studied using XRD, microindentation and tensile testing. The influence of strain level at cold rolling and time-temperature parameters of ageing on the formation of structure and phase composition of solution treated and water quenched Ti-3Al-5Mo-4.5V alloy was investigated and discussed in terms of tensile properties and microhardness. The parameters of low temperature thermomechanical treatment (LTMT) of the (α+β) — alloy were proposed to obtain a high-strength state.

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Effect of low temperature thermomechanical treatment on the phase composition and properties of a two-phase titanium alloy

Cited by 3 publications

References 7 publications

Fracture surface analysis of a quenched (α+β)-metastable titanium alloy

Fracture surface analysis of a quenched (α+β)-metastable titanium alloy

The Spectrum of Crystallographic Misorientations of Intercrystalline Boundaries for BCC-HCP Phase Transformation in Additively Manufactured Ti-6Al-4V

Effect of Thermomechanical Treatment Parameters on Structure, Phase Composition and Mechanical Properties of Ti-3Al-5Mo-4.5V Titanium Alloy

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