Metallographic study of ?-solid solution decomposition for titanium alloy VT22

Orlova, L. M.; Lemesh, A. D.; Belozub, G. P.; Filatova, T. V.

doi:10.1007/bf00735554

Cited by 5 publications

(2 citation statements)

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“…In the Ti-5Al-5Mo-5V-1Cr-1Fe titanium alloy, different types of microstructure can be obtained after different heat treatments, such as bimodal, equiaxed, and Widmanstätten [1,2].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and high cycle fatigue fracture surface of a Ti–5Al–5Mo–5V–1Cr–1Fe titanium alloy

Shi

Sha

et al. 2013

Materials Science and Engineering: A

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Because of the requirements for the damage tolerance and fatigue life of commercial aircraft components, the high cycle fatigue (HCF) properties of Ti-5Al-5Mo-5V-1Cr-1Fe titanium alloy forgings are important. The effects of microstructure types of the α + β titanium alloy on fatigue properties need to be understood. In this paper, by analysing the fracture surfaces of the titanium alloy having four types of microstructure, the effects of microstructure are investigated. The differences of initiation areas and crack propagation among different microstructures were studied. It was found that the area of the initiation region decreases in the order of coarse basketweave, fine basketweave, Widmanstätten, and bimodal microstructure.

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“…In the Ti-5Al-5Mo-5V-1Cr-1Fe titanium alloy, different types of microstructure can be obtained after different heat treatments, such as bimodal, equiaxed, and Widmanstätten [1,2].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and high cycle fatigue fracture surface of a Ti–5Al–5Mo–5V–1Cr–1Fe titanium alloy

Shi

Sha

et al. 2013

Materials Science and Engineering: A

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“…The growth of the α WGB phase may be explained by diffusional mobility of the atoms, and the boundary zone saturated with defects, is the site of facilitated diffusion, thus grain boundaries are preferential nucleation sites. Orlova L M. et al [17] think that the nonuniform decomposition of β matrix result in the α phase platelets along grain boundary. Moreover, it can be seen from Fig.…”

Section: Resultsmentioning

confidence: 99%

Isothermal α Precipitation and Evolution in a Hot-Rolled near β Titanium Alloy

Sun

Xue

Kou

et al. 2016

MSF

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Evolution of secondary α precipitates in a near β titanium alloy Ti-7Mo-3Al-3Nb-3Cr hot-rolled bars (Φ14mm and Φ22mm) with different rolling processes was investigated. The results indicated that the morphological evolution of secondary α phase was almost the same, despite of different rolling processes. While the precipitation kinetics of secondary α phase in short-term aging process changed significantly. Secondary α phase precipitated along β grain boundaries (αGB) and inside β grains as dot shape initially, when aged at 500oC. With time increasing, dot-shaped α phase precipitates connected together as line. And nucleation of α-laths from the grain boundaries (αWGB) appeared as time reached to 10 minutes. Meanwhile, chevron-shaped secondary α phase precipitated from β matrix. Secondary α phase evolved into acicular shape, when aging time was extended to 20min or much more, and the angle between each other was about 90o or 60o. The volume fraction of secondary α phase in Φ22mm bar was larger and changed faster than that of Φ14mm bar with the changing of aging temperature (500oC-600oC) and time (≤60minutes). αWGB formed both along high angle GB and low angle GB after aged at 500oCfor tenminutes, with two sides of αGB.

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