Hot deformation behavior of Ti–20Zr–6.5Al–4V alloy in the α+β and single β phase field

Tan, Yuanbiao; Duan, Jingli; Liu, Yang; Liu, W.C.; Zhang, J.W.; Liu, R.P.

doi:10.1016/j.msea.2014.05.014

Cited by 45 publications

(11 citation statements)

References 45 publications

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“…True stress rapidly increased peak stress at a strain capacity range of 0.1 and sharply dropped to a relatively low value and then gradually reached a steady state during the strain increasing. A similar stress drop has been reported in Ti-20Zr-6.5Al-4V [16] and Ti-6Al-2Zr-1Mo-1V alloys [17]. The sudden stress drop in this study may be matched with the disappearance of mobile dislocations in the grain boundaries during hot deformation [16].…”

Section: Analysis Of Hot Deformed Flow Behaviorsupporting

confidence: 89%

“…A similar stress drop has been reported in Ti-20Zr-6.5Al-4V [16] and Ti-6Al-2Zr-1Mo-1V alloys [17]. The sudden stress drop in this study may be matched with the disappearance of mobile dislocations in the grain boundaries during hot deformation [16]. In addition, during hot deformation, work hardening and dynamic softening greatly affects the change of the flow stress.…”

Section: Analysis Of Hot Deformed Flow Behaviorsupporting

confidence: 87%

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Hot deformation behavior and the processing map of Zr–1.0Be alloy in single α phase

Feng

Jiang

Zhou

et al. 2015

Progress in Natural Science: Materials International

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The hot deformation behavior, hot workability and dynamic recrystallization evolution of Zr-1.0 (wt%) Be alloy in single α phase were investigated by conducting hot compression tests. The strain rates ranging from 10 -3 s -1 to 101 s -1 and testing temperatures varying from 650 1C to 850 1C were used. Flow stress was found to increase with increasing strain rate and decrease with the increment of the deformation temperature. A constitutive equation of flow behavior was established to describe the dependence of flow stress on strain rate and deformation temperature. The activation energy for deformation of Zr-1.0Be alloy was determined to be Q ¼301 kJ/mol. The processing map of Zr-1.0Be alloy was constructed at strain rates ranging from 10 -3 s -1 to 101 s -1 and deformation temperatures varying from 650 1C to 850 1C at the true strain of 0.7. A processing map was used to identify the best domains of thermal processing, including a domain at a temperature of 650 1C and strain rate of 10 -3 s -1 , as well as another domain at deformation temperatures ranging from 800 1C to 850 1C and strain rates varying from 10 -3 s -1 to 10 -1 s -1 . Microscopic analysis of Zr-1.0Be alloy showed that the flow instability and kink were very obvious at low temperatures and high strain rates. At high temperatures and low strain rates, the dynamic recrystallization became the main softening mechanism during hot working.

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Section: Analysis Of Hot Deformed Flow Behaviorsupporting

confidence: 89%

Section: Analysis Of Hot Deformed Flow Behaviorsupporting

confidence: 87%

Hot deformation behavior and the processing map of Zr–1.0Be alloy in single α phase

Feng

Jiang

Zhou

et al. 2015

Progress in Natural Science: Materials International

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“…Tan [33,34] has also reported the similar result that the dynamic recrystallization presents in TiZr based alloys during hot deformation. However, most blocky β grains 8 / 18 appproximate 50 μm are observed in the F20 alloy.…”

Section: ． Results and Discussionmentioning

confidence: 55%

Preparation of low cost TiZrAlFe alloy with ultra-high strength and favorable ductility

Liang

Yin

Zheng

et al. 2015

Materials Science and Engineering: A

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“…The decrease in the activation energy for deformation can be attributed to the increase in the Zr content because the self-diffusion activation energy in β-Zr (120 kJ mol À 1 ) is lower than that in β-Ti (153 kJ mol À 1 ) [34]. Similarly, the activation energy for Ti-20Zr-6.5Al-4V alloy was dramatically lower than that for Ti-6Al-4V alloy [35,36]. The activation energies for deformation in the two ZrTiAlV alloys were higher than the self-diffusion activation energy in β-Zr, which means that the mechanism of hot deformation in the ZrTiAlV alloys was likely to be dynamic recrystallization.…”

Section: Kinetic Analysismentioning

confidence: 98%

Hot deformation behavior of 51.1Zr–40.2Ti–4.5Al–4.2V alloy in the single β phase field

Duan

Tan

et al. 2015

Progress in Natural Science: Materials International

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The hot deformation behavior of a newly developed 51.1Zr-40.2Ti-4.5Al-4.2 V alloy was investigated by compression tests in the deformation temperature range from 800 to 1050 1C and strain rate range from 10 À 3 to 10 0 s À 1 . At low temperatures and high strain rates, the flow curves exhibited a pronounced stress drop at the very beginning of deformation, followed by a slow decrease in flow stress with increasing strain. The magnitude of the stress drop increased with decreasing deformation temperature and increasing strain rate. At high temperatures and low strain rates, the flow curves exhibited typical characteristics of dynamic recrystallization. A hyperbolic-sine Arrhenius-type equation was used to characterize the dependences of the flow stress on deformation temperature and strain rate. The activation energy for hot deformation decreased slightly with increasing strain and then tended to be a constant value. A microstructural mechanism map was presented to help visualize the microstructure of this alloy under different deformation conditions.

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Hot deformation behavior of Ti–20Zr–6.5Al–4V alloy in the α+β and single β phase field

Cited by 45 publications

References 45 publications

Hot deformation behavior and the processing map of Zr–1.0Be alloy in single α phase

Hot deformation behavior and the processing map of Zr–1.0Be alloy in single α phase

Preparation of low cost TiZrAlFe alloy with ultra-high strength and favorable ductility

Hot deformation behavior of 51.1Zr–40.2Ti–4.5Al–4.2V alloy in the single β phase field

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