Dynamic recovery and recrystallization in titanium alloys by hot deformation

Furuhara, Tadashi; Poorganji, Behrang; Abe, Hiroki; Maki, Tadashi

doi:10.1007/s11837-007-0013-8

Cited by 156 publications

(56 citation statements)

References 23 publications

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“…It should be noticed that the grain boundaries of severely deformed specimens show zigzag patterns. According to Furuhara's EBSD study on hot deformed Ti-10V-2Fe-3Al, 4) such patterns of grain boundaries are the evidence of a dynamic recovery.…”

Section: Resultsmentioning

confidence: 99%

“…Most of titanium alloys, such as Ti-15V-3Al-3Cr-3Sn, 1) Ti-13Mn, 2) Ti-13Cr-11V-3Al, 3) Ti-10V-2Fe-3Al, 4) Ti3Al-8V-6Cr-4Mo-4Zr, 5) Ti-10V-4.5Fe-1.5Al, 6) Ti-6.8Mo-4.5Fe-1.5Al, 7) etc., show a common deformation feature that their stress-strain curves exhibit a sharp yield point and the subsequent abrupt yield drop followed by the constant flow stress or strain softening. In the previous research, [8][9][10][11] it was explained that such yield point phenomena result from either a dislocation unlocking mechanism or a dislocation multiplication at a very early stage of yielding.…”

Section: Introductionmentioning

confidence: 99%

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Yield-Point Phenomena of Ti-20V-4Al-1Sn at 1073 K and Its Constitutive Modelling

et al. 2009

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The deformation behaviour of titanium alloy Ti-20V-4Al-1Sn sheet at 1073 K was investigated by performing uniaxial tension experiments. The stress-strain curves show a sharp yield point and the subsequent abrupt yield drop followed by the strain softening. From the EBSD analysis, a crystallographic misorientation was found in grains even at an early stage of yielding, even though the dynamic recovery had not yet taken place. To describe such a characteristic stress-strain response, a viscoplastic constitutive model is proposed that is built on the premise that the yield point phenomena are associated with the rapid dislocation multiplication at an early stage of yielding.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Yield-Point Phenomena of Ti-20V-4Al-1Sn at 1073 K and Its Constitutive Modelling

et al. 2009

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“…In α + β two-phase temperature region, the hot deformation behaviors of Ti-13Nb-13Zr titanium alloy present typical DRX softening mechanism. However, in β-phase temperature region, the hot deformation behaviors in predominant β-phase present distinct DRV softening mechanism, whereas some discontinuous dynamic recrystallization may occur along β grain boundaries [22]. When temperature increases across β-transus, from a α + β two-phase temperature to a β-phase temperature, the corresponding softening mechanism shift from DRX + DRV to DRV.…”

Section: Elementary Mechanisms Of Dislocation and Slippingmentioning

confidence: 98%

Analytical Descriptions of Dynamic Softening Mechanisms for Ti-13Nb-13Zr Biomedical Alloy in Single Phase and Two Phase Regions

Quan¹,

Wang²,

Li³

et al. 2017

Archives of Metallurgy and Materials

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Dynamic softening behaviors of a promising biomedical Ti-13Nb-13Zr alloy under hot deformation conditions across dual phase α + β and single phase β regions were quantitatively characterized by establishing corresponding dynamic recovery (DRV) and dynamic recrystallization (DRX) kinetic models. A series of wide range hot compression tests on a Gleeble-3500 thermo-mechanical physical simulator were implemented under the strain rate range of 0.01-10 s −1 and the temperature range of 923-1173 K. The apparent differences of flow stress curves obtained in dual phase α + β and single phase β regions were analyzed in term of different dependence of flow stress to temperature and strain rate and different microstructural evolutions. Two typical softening mechanisms about DRV and DRX were identified through the variations of a series of stress-strain curves acquired from these compression tests. DRX is the dominant softeni ng mechanism in dual phase α + β range, while DRV is the main softening mechanism in single phase β range. The DRV kinetic model for single phase β region and the DRX kinetic model for dual phase α + β region were established respectively. In addition, the microstructures of the compressed specimens were observed validating the softening mechanisms accordingly.

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“…The studies have shown that the main hot deformation mechanisms in Ti-10-2-3 deformed at above β transus temperature and strain rates from 0.001 to 10 s −1 are both dynamic recovery (DRV) and dynamic recrystallisation (DRX) [13][14][15][16]. Akanuma et al [17] studied the effect of hot deformation on athermal α" formation for Ti-10-2-3 alloy.…”

Section: Introductionmentioning

confidence: 99%

Formation of Deformation-Induced Products in a Metastable-β Titanium Alloy during High Temperature Compression

Samiee

Casillas

Ahmed

et al. 2018

Metals

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A metastable-β titanium alloy, Ti-10V-3Fe-3Al (wt. %), was subjected to thermo-mechanical processing including the compression test at 725 • C, which is below the β transus temperature (780 • C), and at strain rate of 10 −3 s −1 . The presence of phases was determined using transmission electron microscopy and X-ray diffraction. Although the dynamic recovery took place together with slip, both deformation-induced α" martensite and ω were detected as other operating mechanisms for the first time in metastable-β titanium alloy deformed in α + β region. The volume fraction of stress-induced α" was higher than that of the same alloy deformed at room temperature due to a higher strain applied. Stress-induced twinning was not operational, which could be related to the priority of slip mechanism at high temperature resulted from thermally-assisted nucleation and lateral migration of kink-pairs.

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Dynamic recovery and recrystallization in titanium alloys by hot deformation

Cited by 156 publications

References 23 publications

Yield-Point Phenomena of Ti-20V-4Al-1Sn at 1073 K and Its Constitutive Modelling

Yield-Point Phenomena of Ti-20V-4Al-1Sn at 1073 K and Its Constitutive Modelling

Analytical Descriptions of Dynamic Softening Mechanisms for Ti-13Nb-13Zr Biomedical Alloy in Single Phase and Two Phase Regions

Formation of Deformation-Induced Products in a Metastable-β Titanium Alloy during High Temperature Compression

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