Reassessment of the binary Aluminum-Titanium phase diagram

Schuster, Julius C.; Palm, Martin

doi:10.1361/154770306x109809

Cited by 411 publications

(159 citation statements)

References 172 publications

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“…5), L þ Al 3 Ti , Al, is coming from the Al-Ti peritectic point at 665°C and 0.08 at.%Ti. [32] From Table 1,i t appears that at 620°C, a liquid containing 5 at.%Si and saturated in Ti is in equilibrium simultaneously with Al 3 Ti and with the Al-fcc solid solution. At 620°C, the solubility value measured for an Al-9 at.%Si alloy, in equilibrium with Al 3 Ti is 0.06 at.%Ti (see Fig.…”

Section: Liquidus Projectionmentioning

confidence: 99%

On the Liquid/Solid Phase Equilibria in the Al-Rich Corner of the Al-Si-Ti Ternary System

Dezellus

Gardiola

Andrieux

et al. 2014

J. Phase Equilib. Diffus.

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The nature of liquid-solid phase equilibria in the Al-rich corner of the Al-Si-Ti system are determined by drawing three isothermal sections at 620, 680 and 727°C. The solubility of Ti in Al-Si liquids is determined for four different compositions (0, 9, 13 and 18 at.%Si) at temperature below 800°C. Combination of the two sets of experimental results leads to an attempt of liquidus projection. The primary crystallization surface of Al 3 Ti is found to extend up to 9.5 at.%Si in the liquid phase at 620°C and 11 at.%Si at 727°C. The solubility of Ti is found to be not significantly dependent on the Si content of the liquid. From DSC measurements and deduction on microstructure, the last invariant reaction of the solidification path is found to be quasi-peritectic: L

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Section: Liquidus Projectionmentioning

confidence: 99%

On the Liquid/Solid Phase Equilibria in the Al-Rich Corner of the Al-Si-Ti Ternary System

Dezellus

Gardiola

Andrieux

et al. 2014

J. Phase Equilib. Diffus.

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“…In addition to the three MAX phase carbides, peaks corresponding to an intermetallic that crystallizes like γ-TiAl, with tetragonal space group P 4 /mmm [37], were found. Refinement of the site occupancy factor on the Ti site led to 50% Ti and 50% Al antisite defects, yielding a stoichiometry of (Ti 0.5 Al 0.5 )Al.…”

Section: B High-temperature Neutron Diffractionmentioning

confidence: 99%

High-temperature neutron diffraction and first-principles study of temperature-dependent crystal structures and atomic vibrations in Ti3AlC2, Ti2AlC, and Ti5Al2C3

Lane

Vogel

Caspi

et al. 2013

Journal of Applied Physics

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Herein we report on the thermal expansions and temperature-dependent crystal structures of select ternary carbide MAX phases in the Ti-Al-C phase diagram in the 100-1000• C temperature range. A bulk sample containing 38(±1) wt.% Ti5Al2C3 ("523"), 32(±1) wt.% Ti2AlC ("211"), 18(±1) wt.% Ti3AlC2 ("312"), and 12(±1) wt.% (Ti0.5Al0.5)Al is studied by Rietveld analysis of high-temperature neutron diffraction data. We also report on the same for a single-phase sample of Ti3AlC2 for comparison. The thermal expansions of all the MAX phases studied are higher in the c direction than in the a direction. The bulk expansion coefficients -9.3(±0

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“…The experimental order-disorder transformation temperature is unknown due to the transformation of hcp Ti-Al to bcc Ti-Al at temperatures where DO 19 Ti 3 Al is still stable 37 . While early assessments of the TiAl binary phase diagram depicted an order-disorder transition temperature below the transformation of hcp Ti-Al to bcc [47][48][49] , more recent assessments have concluded that it occurs at temperatures above the hcp to bcc transition 37,50 .…”

Section: Discussionmentioning

confidence: 99%

Effect of disorder on the dilute equilibrium vacancy concentrations of multicomponent crystalline solids

Belak

Ven

2015

Phys. Rev. B

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We develop statistical mechanical methods to predict the thermodynamic properties of dilute vacancies in multi-component solids from first principles. The approach relies on a coarse graining procedure to predict dilute vacancy concentrations with Monte Carlo simulations in alloys exhibiting varying degrees of short and long-range order. We apply this approach to a study of vacancies in hcp based Ti-Al binary alloys and find a strong dependence of the equilibrium vacancy concentration on the Al concentration and the degree of long-range order, especially at low temperature.

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Reassessment of the binary Aluminum-Titanium phase diagram

Cited by 411 publications

References 172 publications

On the Liquid/Solid Phase Equilibria in the Al-Rich Corner of the Al-Si-Ti Ternary System

On the Liquid/Solid Phase Equilibria in the Al-Rich Corner of the Al-Si-Ti Ternary System

High-temperature neutron diffraction and first-principles study of temperature-dependent crystal structures and atomic vibrations in Ti3AlC2, Ti2AlC, and Ti5Al2C3

Effect of disorder on the dilute equilibrium vacancy concentrations of multicomponent crystalline solids

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