Cold deformation behavior of the Ti-15Mo-3Al-2.7Nb-0.2Si alloy and its effect on α precipitation and tensile properties in aging treatment

Xu, Tianyu; Li, J.S.; Zhang, S.S.; Zhang, F.S.; Liu, X.H.

doi:10.1016/j.jallcom.2016.04.293

Cited by 43 publications

(13 citation statements)

References 26 publications

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“…The effect of reduced temperature of ageing is a low diffusion mobility of alloying elements that in its turn leads to the formation of more number of nucleation sites for secondary α-phase particles. However the results of present investigation and also in [6], [10] show that the secondary α-phase dispersion is determined also by the dislocation structure of β-matrix. In the annealed material the recrystallized grains, having the reduced density of dislocations, generally have the reduced dispersion of secondary α-phase, i.e.…”

supporting

confidence: 43%

“…The cold deformation of β-titanium alloys in its turn is used for manufacturing of wire, springs and seamless tubes and allows to expedite the ageing process for alloys high in β-stabilizers [1]. A typical picture for ageing of cold-worked β-titanium alloy is a growth of strength and a fall of ductility because of precipitation hardening process [5], [6].…”

Section: Introductionmentioning

confidence: 99%

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The Difference between Hot and Cold Deformation and its Effect on Microstructure and Mechanical Properties of Near Beta Titanium Alloy

Grebenchshikov¹,

Ледер²,

Волков³

2020

MATEC Web Conf.

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An investigation of cold and hot deformation and the subsequent heat treatment including the annealing at the (α+β)- field temperature and ageing of VST55531 alloy showed that the material after the cold drawing without the heat treatment has the extremely low values of uniform elongation and during the tensile test the strain becomes localized at a neck upon 0.2 % strain. The ageing of coldworked material improves the strength and increases a limit of uniform deformation and generally has a beneficial effect on a strengthto-ductility ratio of alloy probably due to achieving a special morphology of secondary α-phase. The obtained values of the combination of strength and ductility in the cold-worked material at 50% strain reduction degree are 1 625 MPa for UTS, 8% - El, 36% - RA, that exceed significantly the values obtained for the hot-worked and as-annealed material, and are attractive for application in products that require the increased strength and ductile characteristics.

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supporting

confidence: 43%

Section: Introductionmentioning

confidence: 99%

The Difference between Hot and Cold Deformation and its Effect on Microstructure and Mechanical Properties of Near Beta Titanium Alloy

Grebenchshikov¹,

Ледер²,

Волков³

2020

MATEC Web Conf.

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“…With the growing accumulation of dislocation, the LAGBs transform into the subgrain boundaries gradually, and then the subgrain boundaries turn into HAGBs after further deformation, that is, a large number of DRX grains with the HAGBs form (Figure c), consisting with the evolution characteristics of grain boundaries distribution listed in Table . In other words, inside of the elongated B2 grains, the DRX process is dominated by the CDRX mechanism, which has been found in some titanium alloys, including Ti–7333, Ti–15Mo–3Al–2.7Nb–0.2Si . At the same time, the bulged grain boundaries serve as the new nucleus for DDRX grains.…”

Section: Resultsmentioning

confidence: 92%

Hot Deformation Behavior, Dynamic Recrystallization, and Texture Evolution of Ti–22Al–25Nb Alloy

Kou

Tang

et al. 2017

Adv Eng Mater

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The hot deformation behavior, dynamic recrystallization, and texture evolution of Ti-22Al-25Nb alloy in the temperature range of 950-1050 C and strain rate range of 0.001-1 s À1 is investigated by plane-strain compression testing on the Gleeble-3500 thermo-mechanical simulator. The results show that the flow stress decreases with the increase of temperature and decrease of strain rate. Besides, the flow curves appear a serrate oscillation at a strain rate of 0.1 s À1 for all the temperature ranges, which may result from instability such as flow localization or micro-cracking. The flow behavior can be expressed by the conventional hyperbolic sine constitutive equation and the calculated deformation activation energy Q in the (a 2 þ B2) and B2 regions are 631.367 and 304.812 kJ mol À1 , respectively. The microstructure evolution is strongly dependent on the deformation parameters, and dynamic recrystallization (DRX) is the dominant softening mechanism in the (a 2 þ B2) region, including discontinuous dynamic recrystallization (DDRX), and continuous dynamic recrystallization (CDRX). In addition, the h bcc -fiber of {110} <001> is the dominant texture component in deformed Ti-22Al-25Nb alloy. It is observed that the weakening of the deformation texture is accompanied by the occurrence of DRX, which can be attributed to the large misorientation between DRX grains and neighboring B2 matrix induced by the rotation of DRX grains toward the preferred slip systems.

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“…In contrast, with the increment in the reduction, the diffraction intensity of the (2 2 0) peak first decreases and then increases. In XRD patterns, the full width half maximum (FWHM) of diffraction peaks for deformed metallic materials is used to assess the crystal lattice distortion, owing to the appearance of a dislocation or a crystal cell distortion (Xu et al, 2016). As seen in Figure 1B, it can be observed that the FWHM of the (1 1 0) peak first increases up to reduction of 55% and subsequently decreases after a reduction of 75%.…”

Section: Resultsmentioning

confidence: 99%

The Effect of Cold Swaging Deformation on the Microstructures and Mechanical Properties of a Novel Metastable β Type Ti–10Mo–6Zr–4Sn–3Nb Alloy for Biomedical Devices

Cheng

Wang

et al. 2020

Front. Mater.

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Cold deformation behavior of the Ti-15Mo-3Al-2.7Nb-0.2Si alloy and its effect on α precipitation and tensile properties in aging treatment

Cited by 43 publications

References 26 publications

The Difference between Hot and Cold Deformation and its Effect on Microstructure and Mechanical Properties of Near Beta Titanium Alloy

The Difference between Hot and Cold Deformation and its Effect on Microstructure and Mechanical Properties of Near Beta Titanium Alloy

Hot Deformation Behavior, Dynamic Recrystallization, and Texture Evolution of Ti–22Al–25Nb Alloy

The Effect of Cold Swaging Deformation on the Microstructures and Mechanical Properties of a Novel Metastable β Type Ti–10Mo–6Zr–4Sn–3Nb Alloy for Biomedical Devices

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