FEATURES OF FORMATION OF CRYSTALLOGRAPHIC TEXTURE AND PROPERTIES IN Ti-3Al-2.5V TITANIUM ALLOY DURING TUBES MANUFACTURE

Vakhrusheva, V.S.; Hruzin, Nataliia; Malykhin, D. G.

doi:10.46813/2019-123-105

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…The previous texture study when rolling tubes at strains of 40...60% has shown that the share of radial texture did not exceed 45...49% [12] while requirements to it were not met often (it was at the level of 1-1.2). Besides, some tubes did not pass expansion and bending tests.…”

Section: The Study Resultsmentioning

confidence: 91%

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Influence of Texture on Mechanical Properties of Titanium Alloy Tubes

Vakhrusheva

Hruzin

Tiutieriev

et al. 2020

KEM

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Mechanical properties and texture of tube material formed in the process of tube production were studied. Texture in tubes was estimated by contractile strain ratio (CSR) according to requirements of the standard for tubes. Mechanical properties depend on CSR. Optimal values of mechanical properties were determined: ultimate strength, yield strength and relative elongation which provide CSR values within 1.3...3.5. The texture was evaluated in the process of tube manufacture. An increase in radial component of the texture leads to an increase in CSR. At high CSR values up to 3-3.5, tubes often do not withstand process tests for flattening and bending. Correction of CSR values is required. It was shown that an increase in ductility of tubes increases the value of CSR.

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Section: The Study Resultsmentioning

confidence: 91%

“…Factor Q which reflects wall to diameter strain ratio [8] is indicator of these strains. Besides, overall strain degree, especially at last steps of tube manufacture plays an important role [9].…”

Section: The Study Resultsmentioning

confidence: 99%

Influence of Texture on Mechanical Properties of Titanium Alloy Tubes

Vakhrusheva

Hruzin

Tiutieriev

et al. 2020

KEM

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Providing the necessary type of metal microstructure of titanium and zirconium pipes.

Томило

Пилипенко

2022

Litʹë metall.

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The purpose of this work is – providing deformation conditions for obtaining the required texture of pipes made of Ti-3Al-2.5V alloy based on the choice of rational values of the calibration parameters of the t ool – calibers and mandrels during cold pilger rolling of pipes for the required Q-factor distribution along the deformation cone.Purpose of work – providing deformation conditions for obtaining the required texture of pipes made of Ti-3Al-2.5V alloy based on the choice of rational values of the calibration parameters of the tool – calibers and mandrels during cold pilger rolling of pipes for the required Q-factor distribution along the deformation cone. The research methods were based on the existing dependence, which describes the influence of the distribution of true compressions along the deformation cone along the wall thickness and along the average diameter, on the distribution of the Q-factor. Calibration calculation and calculation of all deformation parameters of the Cold Rolling Pipe Process was based on a number of existing theoretical and empirical dependencies included in the generally accepted adapted methods for their calculation.

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A deformation mode in a cold rolling condition to provide the necessary texture of the Ti-3Al-2.5V alloy

Пилипенко¹,

Grigorenko²,

Козечко³

et al. 2021

Nauk. visn. nat. hirn. univ.

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Purpose. Providing deformation conditions in order to obtain the required texture of pipes made of Ti-3Al-2.5V alloy based on the choice of rational values of the tool calibration parameters gauges and mandrels during cold pilger rolling of pipes for the required Q-factor distribution along the deformation cone. Methodology. The research methods were based on the existing dependence, which describes the influence of the distribution of the ratio of true reduction along the deformation cone along the wall thickness and along the average diameter, on the distribution of the Q-factor value. The calculation of calibration and all deformation parameters of the Cold Reducing tube process was based on a number of existing theoretical and empirical dependencies included in the generally accepted and adapted methods of their computation. To perform calculations, we created the software product Q-Factor. Cold pilger tube rolling. Findings. The influence of the initial taper of the mandrel with a curvilinear generatrix and the sweep of the groove ridge, the degrees of steepness of the generatrix of the mandrel and the sweep of the groove ridge, the value of the feed on the distribution of the Q-factor along the compression zones and pre-finishing of the deformation cone were investigated by calculation. The use of slope degrees n, equal to 1.5, i.e. less than values of crest slope degree had the most significant effect on obtaining the Q-factor close to equilibrium distribution along the length of wall reduction and pre-finishing zones. A method of multifactor calibration of the tool for cold pilger rolling of pipes is proposed, which makes it possible to select rational values of the initial taper of the mandrel with a curved generatrix, the degree of slope of the sweep of the groove ridge and the mandrel, and to create conditions in the wall compression zone for obtaining the required type of metal texture of cold-rolled pipes made of titanium alloy Ti-3-2.5V. At the same time, in the prefabrication zone, in all investigated cases, there is a drop in the Q-factor values below one. Originality. New knowledge was obtained about the influence of the rolling route and the full complex of tool calibration parameters in the process of cold pilger rolling of pipes on the distribution of the Q-factor along the length of the deformation cone. Practical value. A method for determining the modes of deformation with an extended compression zone and without a pre-finishing zone is proposed and tested with positive results. This method provides a distribution of the Q-factor along the reduction zone of the deformation cone which is close to uniform distribution and with values above one. The results obtained make it possible to select the conditions for obtaining the required type of metal texture of cold-rolled pipes from titanium alloy Ti-3Al-2.5V using the software product Q-Factor. Cold pilger tube rolling.

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FEATURES OF FORMATION OF CRYSTALLOGRAPHIC TEXTURE AND PROPERTIES IN Ti-3Al-2.5V TITANIUM ALLOY DURING TUBES MANUFACTURE

Cited by 3 publications

References 5 publications

Influence of Texture on Mechanical Properties of Titanium Alloy Tubes

Influence of Texture on Mechanical Properties of Titanium Alloy Tubes

Providing the necessary type of metal microstructure of titanium and zirconium pipes.

A deformation mode in a cold rolling condition to provide the necessary texture of the Ti-3Al-2.5V alloy

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