Configuration and the recovery of defects in TiAl intermetallic compounds studied by positron annihilation

Li, Z.X.; Wang, B.Y.; Wang, D.N.; Zhang, L.Z.; Qin, Xiubo; Xue, D. S.

doi:10.1016/j.intermet.2010.06.009

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…Intermetallic TiAl alloys are new kind of high-temperature structural material due to advantages of low density, high-temperature resistance and high specific strength which are depended on the coexistence of metal bond and covalent bond [1–7]. The demand for lightweight alloys in the field of advanced manufacturing provides an opportunity for the development of TiAl alloys.…”

Section: Introductionmentioning

confidence: 99%

Recent research and development of mould materials for casting TiAl alloys

Fan

Liang

Liu

et al. 2019

Materials Science and Technology

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Intermetallic TiAl alloys are new generation high-temperature material. However, extensive application of TiAl alloys is hindered by some disadvantages, especially the high processing cost. Currently, precision casting is an effective method to manufacture TiAl components with complex shape. However, the interfacial reaction between the TiAl alloy melt and mould affects the quality of the castings and hinders extensive applications of casting TiAl components. In this paper, the research status of mould materials for the casting of TiAl alloys is reviewed. Performances of present used mould materials are compared in details. Reaction mechanisms between mould materials and the melts of TiAl alloys are also summarised. Finally, the future development tendency and prospect are pointed out.

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Section: Introductionmentioning

confidence: 99%

Recent research and development of mould materials for casting TiAl alloys

Fan

Liang

Liu

et al. 2019

Materials Science and Technology

View full text Add to dashboard Cite

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Atomic origins of radiation-induced defects and the role of lamellar interfaces in radiation damage of titanium aluminide alloy irradiated with Kr-ions at elevated temperature

et al. 2019

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Effects of Vacancy Concentration and Temperature on Mechanical Properties of Single-Crystal γ-TiAl Based on Molecular Dynamics Simulation

Feng

Cao

et al. 2018

High Temperature Materials and Processes

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Molecular dynamics simulation is used to analyze tensile strength and elastic modulus under different temperatures and vacancy concentrations. The effects of temperature and vacancy concentration on the mechanical properties of γ-TiAl alloy are investigated. The results show that the ultimate stress, ultimate strain and elastic modulus decrease nonlinearly with increasing temperature and vacancy concentration. As the temperature increases, the plastic of material is reinforced. The influence of temperature on strength and elastic modulus is larger than that of vacancy concentration. The evolution process of vacancy could be observed clearly. Furthermore, vacancies with different concentrations develop into voids first as a function of external forces or other factors, micro cracks evolve from those voids, those micro cracks then converge to a macro crack, and fracture will finally occur. The vacancy evolution process cannot be observed clearly owing to the thermal motion of atoms at high temperature. In addition, potential energy is affected by both temperature and vacancy concentration.

show abstract

Configuration and the recovery of defects in TiAl intermetallic compounds studied by positron annihilation

Cited by 3 publications

References 19 publications

Recent research and development of mould materials for casting TiAl alloys

Recent research and development of mould materials for casting TiAl alloys

Atomic origins of radiation-induced defects and the role of lamellar interfaces in radiation damage of titanium aluminide alloy irradiated with Kr-ions at elevated temperature

Effects of Vacancy Concentration and Temperature on Mechanical Properties of Single-Crystal γ-TiAl Based on Molecular Dynamics Simulation

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