Synthesis and high-pressure electrical resistivity studies of Ti3Al

Vennila, R. Selva; Porchelvi, E. Elamurugu; Joy, K. M. Freny; Arun, Thandra; Jaya, N. Victor

doi:10.1016/j.jallcom.2004.09.004

Cited by 5 publications

(3 citation statements)

References 4 publications

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“…The final evaluation of the brittle/ductile nature of investigated phases is quantified based on the B/G Pugh plasticity criterion, originally proposed for pure metals [25] and later used for a wide group of compounds with complex structures and diversified stoichiometry. [44] The considered intermetallic phases exhibit a metallic nature (no band gap, [45] good electrical conductivity [46,47] ). As the constituent elements are simple (Al) and transition (Ti) metals, the bond character is mixed, metallic (s and p-type electrons), and covalent (d-type electrons).…”

Section: Methodsmentioning

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

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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.

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Section: Methodsmentioning

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

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“…Recently, Ti 3 Al-based alloys have attracted particular attention as suitable materials for high temperature applications due to their low density, enhanced strength at elevated temperature, good resistance to oxidation and high stiffness [1][2][3][4][5][6][7]. However, their low ductility and poor formability at ambient temperature are the major disadvantages for practical applications, which has been solved by the addition of elements such as Nb,V, and Mo to stabilize the fcc Ti 3 Al [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution of TLP Bonded Ti3Al-Nb Alloy Joints

Duan²,

et al. 2014

High Temperature Materials and Processes

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In the present study microstructural evolution in transient liquid phase (TLP) bonded Ti 3 Al-Nb alloy joints using a pure copper as interlayer was investigated. TLP bonded Ti 3 Al-Nb alloy joints composed of intermetallic compound layers were produced. Microstructural evolution of joints depended on both bonding time and bonding temperature. With increasing bonding time and bonding temperature, the joint width increased and amount of compounds in the joint decreased. The joint microstructure at 1173 K × 1 min mainly consisted of Ti (solid solution) + Ti 2 Cu + TiCu + Ti 3 Cu 4 + Ti 2 Cu 3 + TiCu 4 + Cu (solid solution) phase and it changed to Ti (solid solution) + Ti 2 Cu + TiCu at 1223 K × 60 min. Compounds formed on cooling from the bonding temperature by liquid phase were eliminated from the joint at 1223 K × 60 min due to isothermal solidification of liquid phase. The increase of the width of joint is attributed to the composition difference between the isothermal solidification production and its adjacent base material.

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“…A large number of researchers have been trying Ti-xAl alloys in an attempt to combine most of their advantages, such as high specific yield strength, good structural stability, and excellent resistance against oxidation and corrosion [3,4]. However, the practical utilization of Ti-xAl alloys have been limited since their forming processes are much more laborious than one may think, which is mainly due to the fact that because in solid solution Ti combines with carbon, nitrogen, and especially oxygen, Ti-xAl alloys are constrained to be melted in inert environments or in a vacuum [5].…”

Section: Introductionmentioning

confidence: 99%