Structural and phase transformations in a quenched two-phase titanium alloy upon cold deformation and subsequent annealing

Илларионов, А. Г.; Демаков, С. Л.; Stepanov, S. I.; Илларионова, С. М.

doi:10.1134/s0031918x15030060

Cited by 11 publications

(18 citation statements)

References 6 publications

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“…Cold plastic deformation of titanium alloys in hardened state was already analysed [8,9]. It was found among others that deformation of α" phase in Ti-3Al-4.5V-5Mo (VT16) alloy is accompanied by α" → α' laths transformation.…”

Section: Introductionmentioning

confidence: 99%

The effect of plastic deformation on martensite decomposition process in Ti-6Al-4V alloy

et al. 2020

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Microstructure and mechanical properties of heat treated martensitic two-phase α+β titanium alloys are in major perspective determined by results of martensite decomposition during tempering. The process of martensitic α’(α”) phase decomposition in titanium alloys, although utilized in industry for years, has not been sufficiently characterized in the scientific literature. Especially aspects of plastically deformed martensite decomposition is poorly described. Preliminary research results of water quenched Ti-6Al-4V alloy, subsequently cold deformed in compression and tempered at the temperature range of 600-900ºC for 1 and 2 h indicated that α’(α”) martensite undergoes strain hardening and deformed martensite laths exhibit tendency towards fragmentation and spheroidization during tempering at 900ºC. In the present paper, also α’(α”) martensite decomposition under compressive load applied at the temperature range of 600-900ºC is considered too. Based on light and scanning electron microscopy observations, thermal analyses and XRD measurements, the effect of plastic deformation on kinetics of martensite decomposition and morphology of α phase formed in the process is analysed.

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Section: Introductionmentioning

confidence: 99%

The effect of plastic deformation on martensite decomposition process in Ti-6Al-4V alloy

et al. 2020

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“…1c, d). It was previously shown in [6] that the above structure had been formed as a result of the strain-induced transformation of αʺ-martensite. Note that not only the strain-induced transformation, but also the fragmentation and warping of the observed plates took place during cold rolling to 45 % (as indicated by arrows in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Based on the above results, the LTTMT of the specimens was as follows: ST at 850 °C (T s =β transus -10 °C) water quenching and cold rolling at a room temperature with a reduction ratio of 45 % was provided by the rolling mill DUO. The rolling route was as follows: circle -oval -90° rotation of the template -oval [6]. The final operation was aging at 500 °C, with the soaking varying from 3 to 24 hours.…”

Section: Resultsmentioning

confidence: 99%

“…However, the phase transition of the second order might occur in β-metastable Ti-alloys with K β of about 1 [4], and this would definitely result in the physical and mechanical properties. We have already studied the structure, phase composition and properties of the VT16 alloy after ST followed by cold deformation and subsequent continuous heating at a temperature range including its aging temperature range [5,6]. In [6] the ST heating temperature was taken as (β transus -10) °C.…”

Section: Introductionmentioning

confidence: 99%

“…We have already studied the structure, phase composition and properties of the VT16 alloy after ST followed by cold deformation and subsequent continuous heating at a temperature range including its aging temperature range [5,6]. In [6] the ST heating temperature was taken as (β transus -10) °C. It provided a structure with the maximum fraction of orthorhombic α"-martensite capable of age hardening and allowed us to eliminate active β-grain growth due to the conservation of the number of primary α-phase particles.…”

Section: Introductionmentioning

confidence: 99%

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

Stepanov¹,

Илларионов²,

Демаков³

et al. 2016

AIP Conference Proceedings

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Decomposition of deformed α′(α″) martensitic phase in Ti–6Al–4V alloy

Motyka

Baran-Sadleja

Sieniawski

et al. 2019

Materials Science and Technology

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The process of martensitic α′( α″) phase decomposition in titanium alloys has not been sufficiently characterised in the literature – especially in terms of plastically deformed martensite. The research results of water-quenched Ti–6Al–4V alloy, subsequently cold deformed in compression test and tempered at the temperature range of 600–900°C for 1 and 2 h were presented in the paper. Light and scanning electron microscopy observations revealed the influence of plastic deformation on tempered martensite laths morphology – particularly at the temperature of 900°C – it favoured their fragmentation and spheroidisation. The effect of plastic deformation on characteristic temperatures of α′( α″)→ α + β phase transformation, phase composition and alloying elements distribution in phase constituents of Ti–6Al–4V alloy was identified and evaluated too. This paper is part of a thematic issue on Titanium. GRAPHICAL ABSTRACT

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Structural and phase transformations in a quenched two-phase titanium alloy upon cold deformation and subsequent annealing

Cited by 11 publications

References 6 publications

The effect of plastic deformation on martensite decomposition process in Ti-6Al-4V alloy

The effect of plastic deformation on martensite decomposition process in Ti-6Al-4V alloy

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

Decomposition of deformed α′(α″) martensitic phase in Ti–6Al–4V alloy

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