Grain growth and texture evolution in Ti–6Al–4V during beta annealing under continuous heating conditions

Ивасишин, О. М.; Semiatin, S. L.; Markovsky, P.E.; Shevchenko, S. V.; Ul’shin, S. V.

doi:10.1016/s0921-5093(01)01990-6

Cited by 66 publications

(28 citation statements)

References 6 publications

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“…Two sets of simulations were done, one using the mobility derived from the data in Reference 1 (i.e., Eq. [5]) as well as another based on a mobility equal to one-half of this value. The simulations showed the expected linear behavior at long times.…”

Section: A Transformation Kineticsmentioning

confidence: 99%

“…[1] On the other hand, a number of measurements have shown substantial deviations from parabolic behavior. [2][3][4][5][6] Specifically, periods of rapid and slow growth have been observed during both isothermal heat treatments and processes involving continuous heating. Furthermore, grain-growth kinetics have been found to vary quite noticeably in different lots of Ti-6Al-4V with nominally identical composition and initial microstructure, but different initial textures.…”

Section: Introductionmentioning

confidence: 99%

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Early Stages of Microstructure and Texture Evolution during Beta Annealing of Ti-6Al-4V

Pilchak

Sargent

Semiatin

2017

Metall Mater Trans A

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The early stages of microstructure evolution during annealing of Ti-6Al-4V in the beta phase field were established. For this purpose, a series of short-time heat treatments was performed using sheet samples that had a noticeable degree of alpha-phase microtexture in the as-received condition. Reconstruction of the beta-grain structure from electron-backscatter-diffraction measurements of the room-temperature alpha-phase texture revealed that microstructure evolution at short times was controlled not by general grain growth, but rather by nucleation-and-growth events analogous to discontinuous recrystallization. The nuclei comprised a small subset of beta grains that were highly misoriented relative to those comprising the principal texture component of the beta matrix. From a quantitative standpoint, the transformation kinetics were characterized by an Avrami exponent of approximately unity, thus suggestive of metadynamic recrystallization. The recrystallization process led to the weakening and eventual elimination of the initial beta texture through the growth of a population of highly misoriented grains.

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Section: A Transformation Kineticsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Early Stages of Microstructure and Texture Evolution during Beta Annealing of Ti-6Al-4V

Pilchak

Sargent

Semiatin

2017

Metall Mater Trans A

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“…A number of literatures have demonstrated that different heat treatment routes can produce a variety of microstructures in α + β Ti-6Al-4 V (Ti64) alloys, which strongly affects the static and dynamic properties (Venkatesh et al 2009;Morita et al 2005;Semiatin et al 2003;Ivasishin et al 2002;Chandler 1996). Typical heat treatment processes of Ti64 alloy are conducted in α + β region below β transus, including duplex annealing, solution heat treatment and aging (STA), recrystallization annealing, and mill annealing.…”

Section: Introductionmentioning

confidence: 99%

High cycle fatigue and fatigue crack propagation behaviors of β-annealed Ti-6Al-4V alloy

Jeong

Kwon

Goto

et al. 2017

Int J Mech Mater Eng

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Background: The effect of β annealing on high cycle fatigue (HCF) and fatigue crack propagation (FCP) behaviors of Ti64 alloy were examined, and the results were compared to those of mill-annealed counterpart. Methods: The tensile tests, stress-controlled HCF tests, and FCP tests were conducted, and the fractographic and micrographic analyses were performed before and after the tests. Results: The β-annealed Ti64 specimen showed inferior HCF properties as compared to the mill-annealed counterpart, as a result of lower yield strength. On the other hand the resistance to FCP of β-annealed Ti64 specimen was higher than that of mill-annealed counterpart in low and intermediate ΔK regime. Conclusions: Relatively easy fatigue crack initiation at the colony boundaries of β-annealed Ti64 specimen reduce the resistance to HCF. The resistance to FCP of β-annealed Ti64 specimen increased significantly particularly in low ΔK regime along with severe crack branching and deflection.

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“…This technique has been widely used in titanium alloys in order to obtain a lamellar microstructure with a relatively smaller beta phase grain size, required for a balanced combination of tensile, fatigue, and creep properties. 9) However, the parameters of the RHT process must be carefully controlled so as to prevent excessive grain growth. Therefore, an understanding of the recrystallization and grain growth kinet-Noriaki HIROTA, 1) Fuxing YIN, 2) Tadanobu INOUE 2) and Tsukasa AZUMA 1) 1) Muroran Research Laboratory, The Japan Steel Works, Ltd., 4 Chatsumachi, Muroran, Hokkaido 051-8505 Japan.…”

Section: Introductionmentioning

confidence: 99%

Recrystallization and Grain Growth Behavior in Severe Cold-rolling Deformed SUS316L Steel under Anisothermal Annealing Condition

et al. 2008

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, in the equation is calculated and is found to follow the equation PϭK · exp(0.5/q). Meanwhile, the grain growth exponent, n, for the anisothermally annealed SUS316L steel is also determined and is found to lie between 2.5 and 3.0. On the other hand, EBSD analysis of the evolved microstructure at different heating rates indicates that low heating rate caused partial recrystallization with preferred orientations at the recrystallization finish temperature, while high heating rates above 1 K/s induced the homogeneously nucleated recrystallization microstructure with random orientations and a lognormal type grain size distribution.

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Grain growth and texture evolution in Ti–6Al–4V during beta annealing under continuous heating conditions

Cited by 66 publications

References 6 publications

Early Stages of Microstructure and Texture Evolution during Beta Annealing of Ti-6Al-4V

Early Stages of Microstructure and Texture Evolution during Beta Annealing of Ti-6Al-4V

High cycle fatigue and fatigue crack propagation behaviors of β-annealed Ti-6Al-4V alloy

Recrystallization and Grain Growth Behavior in Severe Cold-rolling Deformed SUS316L Steel under Anisothermal Annealing Condition

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