A study on the microstructures and tensile properties of new beta high strength titanium alloy

Li, Cheng Lin; Mi, Xujun; Ye, Wenjun; Hui, Songxiao; Yu, Yang; Wang, Weiqi

doi:10.1016/j.jallcom.2012.09.140

Cited by 81 publications

(28 citation statements)

References 13 publications

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“…For the fraction of secondary a phase has no remarkable difference, the properties of alloy aged for 4 h (including TieB20 and TieB20e0.1B) are consistent with those of alloy aged for 2 h when the reduction ratio is same. Similar experimental result is obtained in another meta-stable beta titanium alloy (Tie6Cre5Moe5Ve4Al) after being aged at 540 C for 2 h and 4 h [28]. The ductility of TieB20e0.1B alloy mainly depends on fraction of primary a phase (especially the fraction of equiaxed primary a phase).…”

Section: Mechanical Propertiessupporting

confidence: 81%

A study on the microstructures and mechanical properties of Ti–B20–0.1B alloys of direct rolling in the α + β phase region

Huang

Chen

2015

Journal of Alloys and Compounds

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Section: Mechanical Propertiessupporting

confidence: 81%

A study on the microstructures and mechanical properties of Ti–B20–0.1B alloys of direct rolling in the α + β phase region

Huang

Chen

2015

Journal of Alloys and Compounds

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“…properties of the Ti6554 alloy [10,11]. Kent et al have investigated the influence of aging temperature and heating rate on the mechanical properties and microstructure of the Ti6554 alloy [12].…”

Section: And Pinghui Et Al Have Investigated the Relationship Betweementioning

confidence: 99%

The dynamic response of a β titanium alloy to high strain rates and elevated temperatures

Zhan

Kent

Wang

et al. 2014

Materials Science and Engineering: A

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The stress-strain behaviour and microstructural evolution of the Ti-6Cr-5Mo-5V-4Al (Ti6554) alloy was systematically investigated using Split Hopkinson Pressure Bar (SHPB) tests over a wide range of strain rates from 1000 s -1 to 10000 s -1 and initial temperatures from 293K to 1173K. Dislocation slip is the main deformation mechanism for plastic flow of the Ti6554 alloy at high strain rates. The flow stress increases with increasing strain rate and decreasing temperature. Also the flow stress is more sensitive to temperature than to strain rate. For high strain rate deformations, the strain hardening rate is found to be negative at 293K and increases with increasing temperatures. Flow softening observed at 293K is potentially caused by adiabatic heating. The increment in the strain hardening rate with increasing temperatures may be the result of interactions between thermally activated solute Cr atoms and mobile dislocations. When the temperature is raised to 873K, a novel Į precipitate 2 morphology consisting of globular Į aligned in strings was observed in specimens deformed at strain rates of 4000 and 10000 s -1 . It has hardening effects on the ȕ matrix and is purported to nucleate on dislocations introduced by the high strain rate deformation. Adiabatic shear bands were observed in specimens deformed at higher temperatures (873K). The microstructure inside the shear bands is harder than that outside of the shear bands in the Ti6554 alloy.

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“…For high strain rate deformations, it is important to incorporate adiabatic heating into the model. One equation has been extensively used to estimate the temperature elevation during high strain rate deformation: (8) in which and c are the density and specific heat capacity of the material, respectively. The integral is the plastic work i.e.…”

Section: Johnson-cook Modelmentioning

confidence: 99%

“…The Ti6554 (Ti-6Cr-5Mo-5V-4Al) alloy is a newly-developed metastable beta alloy which has a better combination of high strength and excellent ductility compared with Timetal 555 and VT 22 [4][5][6][7]. Li et al has investigated the relationship between microstructures and tensile properties of Ti6554 [8,9]. Damon et al has investigated the influence of aging temperature and heating rate on the properties and microstructure of Ti6554 [10].…”

Section: Introductionmentioning

confidence: 99%

Constitutive Equations to Predict Stress‐Strain Behaviour for a β Titanium Alloy at High Strain Rates Over a Wide Range of Temperatures

Zhan

Gui

Kent

et al. 2016

Proceedings of the 13th World Conference on Titanium

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Stress-strain curves of the Ti-6Cr-5Mo-5V-4Al (Ti6554) alloy obtained from Split Hopkinson Pressure Bar (SHPB) tests over a wide range of temperatures (293-1173K) and strain rates (10 3 -10 4 s -1 ) were employed to fit parameters for the Johnson-Cook(JC) and the Zerilli-Armstrong(ZA) models, respectively. The JC model is able to capture the stress-strain behaviour of the Ti6554 alloy better than the ZA model. However, the limit of the JC model is that it can only predict the flow behaviour accurately in a narrow domain near the strain value which is fixed in the parameters fitting. Also the format of the JC model is inadequate to track the complex strain-hardening behaviour of the Ti6554 alloy.

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A study on the microstructures and tensile properties of new beta high strength titanium alloy

Cited by 81 publications

References 13 publications

A study on the microstructures and mechanical properties of Ti–B20–0.1B alloys of direct rolling in the α + β phase region

A study on the microstructures and mechanical properties of Ti–B20–0.1B alloys of direct rolling in the α + β phase region

The dynamic response of a β titanium alloy to high strain rates and elevated temperatures

Constitutive Equations to Predict Stress‐Strain Behaviour for a β Titanium Alloy at High Strain Rates Over a Wide Range of Temperatures

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