Solubility of vanadium in ? titanium

Molokanov, V. V.; Chernov, D. B.; Budberg, P.B.

doi:10.1007/bf00673866

Cited by 14 publications

(14 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The calculated maximum solubility of vanadium in α -Ti is a mole fraction of 0.0385 and is located at 830 K. At 773 K and 873 K, the calculated vanadium solubility is 0.0369 mol fraction, which is in exact agreement with the measured values for high-purity samples 13 (~ 0.037 mol fraction). The β -transus temperature decreases continuously with increasing vanadium amount, which is in acceptable agreement with the measurements 12 , 21 , 22 shown in Fig.…”

Section: Thermodynamic Modelingsupporting

confidence: 80%

“…1 , dashed lines). The phase diagram review by Murray 1981 11 suggested that the β -transus decreases continuously with increasing vanadium content, based on experimental data by Ermanis et al 12 and Molokanov et al, 13 i.e., without a monotectoid reaction ( β β 1 + β 2 ). Murray concluded that oxygen contamination or insufficiently rapid cooling increased the β -transus temperature and, hence, relied on the data by Ermanis et al 12 in the evaluation.…”

Section: Thermodynamic Information In the Literaturementioning

confidence: 99%

“…

Fig. 6 Calculated vertical section for (a) the titanium-rich side of the Ti-V phase diagram with varying oxygen amounts in comparison to experimental data 13 (symbol), and (b) Metastable diagram at varying oxygen concentrations showing the miscibility gap of the β phase …”

Section: Thermodynamic Modelingmentioning

confidence: 99%

See 2 more Smart Citations

The Effect of Oxygen on Phase Equilibria in the Ti-V System: Impacts on the AM Processing of Ti Alloys

Lindwall

Wang

Kattner

et al. 2018

JOM

View full text Add to dashboard Cite

Oxygen is always a constituent in “real” titanium alloys including titanium alloy powders used for powder-based additive manufacturing (AM). In addition, oxygen uptake during powder handling and printing is hard to control and, hence, it is important to understand and predict how oxygen is affecting the microstructure. Therefore, oxygen is included in the evaluation of the thermodynamic properties of the titanium-vanadium system employing the CALculation of PHAse Diagrams method and a complete model of the O-Ti-V system is presented. The β -transus temperature is calculated to increase with increasing oxygen content whereas the extension of the α -Ti phase field into the binary is calculated to decrease, which explains the low vanadium solubilities measured in some experimental works. In addition, the critical temperature of the metastable miscibility gap of the β -phase is calculated to increase to above room temperature when oxygen is added. The effects of oxygen additions on phase fractions, martensite and ω formation temperatures are discussed, along with the impacts these changes may have on AM of titanium alloys.

show abstract

Section: Thermodynamic Modelingsupporting

confidence: 80%

Section: Thermodynamic Information In the Literaturementioning

confidence: 99%

See 1 more Smart Citation

The Effect of Oxygen on Phase Equilibria in the Ti-V System: Impacts on the AM Processing of Ti Alloys

Lindwall

Wang

Kattner

et al. 2018

JOM

View full text Add to dashboard Cite

show abstract

“…Other examples for such phase diagrams with a temperature-dependent structure change can be found in the literature for systems such as Cr-Ti [83][84][85][86][87], Cr-Nb [88][89][90][91][92][93][94][95], Cr-Hf [96][97][98][99][100][101], Cr-Zr [76,[102][103][104], Hf-Mo [77,[105][106][107][108][109], and Ta-V [110,111]. As will be discussed below in Section 3.5, the C36 Laves phase polytype was observed as an intermediate phase in several of the abovementioned systems.…”

Section: Temperature-dependent Transformations In Systems With Two Lamentioning

confidence: 99%

Structure and stability of Laves phases part II—structure type variations in binary and ternary systems

2005

View full text Add to dashboard Cite

“…The lack of data for diffusion in a-Ti systems is associated with challenges doing low-temperature diffusion experiments (a is stable below about 1160 K for pure Ti) and low solubilities of many alloying elements in the a-Ti matrix. For example, the maximal solubility of V in a-Ti is 0.0385 mol fraction [2,3] and is located at 830 K which makes design of diffusion experiments challenging. Another major challenge with diffusion in the a-Ti systems is the physical characteristics of the phase itself.…”

Section: Introductionmentioning

confidence: 99%

Diffusion in the Ti-Al-V System

Lindwall

Moon

Chen

et al. 2018

J. Phase Equilib. Diffus.

View full text Add to dashboard Cite

Diffusion in the Ti-Al-V system is studied and a CALculation of Phase Diagrams (CALPHAD) diffusion mobility description is developed. Diffusion couple experiments are performed to obtain diffusion paths in the hcp phase at 923 K, 1023 K and 1123 K. The diffusion coefficient of V in the hcp-Ti phase is found to decrease with increasing Al alloying. A forward-simulation analysis is used to evaluate the impurity diffusion coefficient for Al and V diffusion in the hcp Ti-V and the Ti-Al systems which are used as input in the mobility modeling. The composition dependency for the diffusion in the hcp phase in the ternary system is accounted for and a CALPHAD diffusion mobility description is obtained by directly optimizing the mobility parameters as a function of the experimental composition profiles from the diffusion couples. Both experimental data and previous diffusion mobility descriptions in the literature for the bcc Ti-Al-V phase are adopted. A complete description of diffusion in both the hcp and bcc phases for the Ti-Al-V system is presented with the aim to be used for design of Ti alloys and processes. Keywords CALPHAD Á diffusion couples Á diffusion modeling Á interdiffusion Á Ti-Al-V This invited article is part of a special issue of the Journal of Phase Equilibria and Diffusion in honor of Prof. Zhanpeng Jin's 80th birthday. The special issue was organized by Prof. Ji-Cheng (JC) Zhao,

show abstract

Solubility of vanadium in ? titanium

Cited by 14 publications

References 1 publication

The Effect of Oxygen on Phase Equilibria in the Ti-V System: Impacts on the AM Processing of Ti Alloys

The Effect of Oxygen on Phase Equilibria in the Ti-V System: Impacts on the AM Processing of Ti Alloys

Structure and stability of Laves phases part II—structure type variations in binary and ternary systems

Diffusion in the Ti-Al-V System

Contact Info

Product

Resources

About