Effects of transition metals in a binary-phase TiAl–Ti3Al alloy: From site occupancy, interfacial energetics to mechanical properties

Wei, Ye; Zhang, Ying; Lü, Guang-Hong; Xu, Huibi

doi:10.1016/j.intermet.2012.06.012

Cited by 36 publications

(4 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5c is identified as an α 2 -Ti 3 Al phase (ordered hexagonal structure D0 19, Ni 3 Sn-type) with a zone axis of [11 2 0], indexed in Fig. 7e, which is consistent with the lattice parameters of a = 0.577 nm and c = 0.462 nm presented previously [41]. FFT analysis suggests that framed area in Fig.…”

Section: Tem and Hrtem Observationssupporting

confidence: 85%

The Effect of Thermal Hydrogenation Processing on the Nano-Size Grain Refinement, Mechanical Property and Corrosion Resistance of Ti-6Al-4V Alloy

Tsai¹,

Wang²

2017

ECS Trans.

View full text Add to dashboard Cite

In this study, we investigated the effect of hydrogen loading on the hardness and microstructural evolution of Ti-6Al-4V alloy following thermal hydrogenation processing (THP). The refined structure and αβ-Ti3Al intermetallic phase can be formed after the THP treatment with a relatively low hydrogen loading of 0.1 H/M. We proposed a mechanism that the grain refinement can be achieved through the formation of ill-defined lattice structure during the hydrogenation and dehydrogenation reactions. The formation of these intermetallic compounds and refined structure appeared to substantially enhance the hardness of Ti-6Al-4V alloy up to 396 Hv, which was approximately 1.28 times that of non-THP treated condition (308 Hv). The possible mechanisms for these related phase transformation and microstructural evolution were discussed.

show abstract

Section: Tem and Hrtem Observationssupporting

confidence: 85%

The Effect of Thermal Hydrogenation Processing on the Nano-Size Grain Refinement, Mechanical Property and Corrosion Resistance of Ti-6Al-4V Alloy

Tsai¹,

Wang²

2017

ECS Trans.

View full text Add to dashboard Cite

show abstract

“…[14] and [15], c c is the energy per unit area required to separate the solid into two semi-infinite blocks, creating two free surfaces. [60,62] The calculated c c of pure and alloyed c-TiAl(Ti Fig. 3-The calculated E s segregation energy for all studied interfaces.…”

Section: B Influence Of Solutes On Cleavage Energymentioning

confidence: 99%

Ab Initio Study of the Influence of Alloying Elements on Stability and Mechanical Properties of Selected TixAly Intermetallic Compounds and Their TixAly/Al, TixAly/Ti Interfaces in Explosively Welded Metal–Metal Composites

Kwaśniak

Garbacz

2021

Metall Mater Trans A

View full text Add to dashboard Cite

The overall performance of joints fabricated using the explosive welding method depends directly on the brittleness of created intermetallic phases and their cohesion with metallic substrates. In this article, we used first principles calculations to show that Sn, V, Cu, and Mg alloying elements present in Ti- and Al-based alloys have a significant influence on the elastic properties and plastic deformation ability of γ-TiAl and Ti3Al. Selected solutes exhibit diversified preferential site occupancy in bulk phases and ordered phase/metallic substrate interface regions. The largest positive effect on ductility and cleavage energy was found for Cu addition (25 pct increase in the B/G ratio), while Sn largely deteriorates cleavage resistance (up to 8 pct). The presented results reveal that further development in the explosive welding field can be reached through the design/application of new alloys composed of elements that improve the properties of the ordered phases present in the joints.

show abstract

“…The γ us represents the energy barrier for dislocations to overcome from the crack tip when shearing along the slide direction on the fault plane, as described by process (ii) above. The ratio of cleavage energy and unstable stacking fault energy (γ cl /γ us ) demonstrates a capability of a crack extension, [34][35][36] which is relevant to the ductile/brittle character. A material is said to be ductile if the emission of a dislocation is energetically favorable over cleavage at the crack tip with an increasing γ cl /γ us .…”

Section: Effects Of Cr On the Ductile Versus Brittle Character Of The...mentioning

confidence: 99%

Effects of chromium on structure and mechanical properties of vanadium: A first-principles study

Gui¹,

Liu²,

Wang³

et al. 2013

Chinese Phys. B

Self Cite

View full text Add to dashboard Cite

Stability and diffusion of chromium (Cr) in vanadium (V), the interaction of Cr with vacancies, and the ideal mechanical properties of V are investigated by first-principles calculations. A single Cr atom is energetically favored in the substitution site. Vacancy plays a key role in the trapping of Cr in V. A very strong binding exists between a single Cr atom and the vacancy with a binding energy of 5.03 eV. The first-principles computational tensile test (FPCTT) shows that the ideal tensile strength is 19.1 GPa at the strain of 18% along the [100] direction for the ideal V single crystal, while it decreases to 16.4 GPa at a strain of 12% when one impurity Cr atom is introduced in a 128-atom V supercell. For shear deformation along the most preferable {110} ⟨111⟩ slip system in V, we found that one substitutional Cr atom can decrease the cleavage energy (γ cl ) and simultaneously increase the unstable stacking fault energy (γ us ) in comparison with the ideal V case. The reduced ratio of γ cl /γ us in comparison with pure V suggests that the presence of Cr can decrease the ductility of V.

show abstract

Effects of transition metals in a binary-phase TiAl–Ti3Al alloy: From site occupancy, interfacial energetics to mechanical properties

Cited by 36 publications

References 38 publications

The Effect of Thermal Hydrogenation Processing on the Nano-Size Grain Refinement, Mechanical Property and Corrosion Resistance of Ti-6Al-4V Alloy

The Effect of Thermal Hydrogenation Processing on the Nano-Size Grain Refinement, Mechanical Property and Corrosion Resistance of Ti-6Al-4V Alloy

Ab Initio Study of the Influence of Alloying Elements on Stability and Mechanical Properties of Selected TixAly Intermetallic Compounds and Their TixAly/Al, TixAly/Ti Interfaces in Explosively Welded Metal–Metal Composites

Effects of chromium on structure and mechanical properties of vanadium: A first-principles study

Contact Info

Product

Resources

About