Effect of solid solution of Si on mechanical properties of TiAl3 based on the multi-laminated Ti-(SiCP/Al) composite system

Pang, Jincheng; Cui, Xiping; Li, A.B.; Fan, Guohua; Li, Geng; Zhou, Zheng; Wang, Q.W.

doi:10.1016/j.msea.2013.05.007

Cited by 29 publications

(2 citation statements)

References 27 publications

(47 reference statements)

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“…should also be considered when calculating the strength of the LMCs, therefore, when calculating the mechanical properties two aspects have to be considered: i) an effect of the interface layer of with an interface present. Since the failure stress of bulk TiAl 3 is around 600 MPa with large variation due to the brittle nature of TiAl 3 [29], the strength of TiAl 3 in the LMC is calculated based on our previous study [30], showing that a TiAl 3 layer with a thickness of 5 μm had an elastic module of 220±10 GPa measured by nanoindentation. As TiAl 3 is very thin layer in the LMC, σ TiAl3 is assumed to be as high as 6600±300 MPa based on an assumption of elastic deformation of TiAl 3 to a strain of 0.03.…”

Section: Interface Reaction Layermentioning

confidence: 99%

Laminated Ti-Al composites: Processing, structure and strength

Fan

et al. 2016

Materials Science and Engineering: A

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Laminated Ti-Al composite sheets with different layer thickness ratios have been fabricated through hot pressing followed by multi-pass hot rolling at 500˚C. The laminated sheets show strong bonding with an intermetallic interfacial layer of nanoscale thickness between the layers of Ti and Al. The mechanical properties of the composites with different volume fraction of Al from 67% to 10% showed a good combination of strength and ductility. A constraint strain in the hot-rolled laminated structure between the 'hard' and 'soft' phases introduces an elastic-plastic deformation stage, more pronounced as the volume fraction of Al decreases. The thin intermetallic interfacial layer may also contribute to the strength of the composites. This effect increases with increasing volume fraction of the interface layer which thereby can contribute to the flow stress.

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Section: Interface Reaction Layermentioning

confidence: 99%

Laminated Ti-Al composites: Processing, structure and strength

Fan

et al. 2016

Materials Science and Engineering: A

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“…For this reason, care has to be taken when comparing the modulus for materials generated by different testing techniques and on different types of specimens [3]. Having some porosity in the metallic and intermetallic region (residual aluminum), elastic modulus values are detected lower than the literature value of 216-220 GPa [18]. Besides this 7.5 h sintering time was not enough for a fully dense microstructure.…”

Section: Microstructure and Sem-eds Analysesmentioning

confidence: 96%

Determination of the Young Modulus of Ti-TiAl₃Metallic Intermetallic Laminate Composites by Nano-Indentation

et al. 2016

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Nano-indentation is an important technique to determine the Young modulus of multiphase materials where normal tensile tests are not appropriate. In this work, Ti-TiAl3 metallic-intermetallic laminate composites have been fabricated successfully in open atmosphere using commercial purity Al and Ti foils with 250 µm and 500 µm initial thicknesses, respectively. Sintering process was performed at 700• C under 2 MPa pressure for 7.5 h. Mechanical properties including the Young modulus were determined after manufacturing. The Young moduli of metallic and intermetallic phases were determined as 89 GPa and 140 GPa, respectively. Microstructure analyses showed that aluminum foil was almost consumed by forming a titanium aluminide intermetallic compound. Titanium aluminides grow up through spherical shaped islands and metallic-intermetallic interface is a wavy form in Ti-Al system. Thus, the final microstructure consists of alternating layers of intermetallic compound and unreacted Ti metal. Microstructure and phase characterizations were performed by scanning electron microscopy, energy dispersive spectroscopy, and X-ray diffraction. Hardness of test samples was determined as 600 HV for intermetallic zone and 130 HV for metallic zone by the Vickers indentation method.

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New insight into the structural, mechanical, electronic, and thermodynamic properties of the monoclinicTMAl₃‐type aluminides

Pan

2021

Int J of Quantum Chemistry

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Despite of the potential high-temperature technological applications of MoAl 3 alloy because of high-temperature strength and good oxidation resistance, the structure and related properties of the monoclinic TMAl 3 aluminides are entirely unclear. Here, we apply the first-principles calculation to study the structure, elastic, electronic, and thermodynamic properties of the monoclinic TMAl 3 . Five novel monoclinic TMAl 3 aluminides: ScAl 3 , TiAl 3 , VAl 3 , CrAl 3 , and WAl 3 are first predicted. The result shows that the hardness of the monoclinic TiAl 3 is 13.0 GPa, which is larger than the tetragonal TiAl 3 . In particular, the calculated elastic modulus and hardness of WAl 3 are larger than the other TMAl 3 because of the heavy valence electronic density of metal W. Importantly, it is first found that the monoclinic MoAl 3 shows the semiconductor properties with the band gap of 0.047 eV. In addition, the calculated Debye temperature of the monoclinic CrAl 3 is 537.6 K, which is larger than the other monoclinic TMAl 3 . Essentially, the thermal stability of the monoclinic TMAl 3 relies on the vibration of Al and Al Al bond.

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Effect of solid solution of Si on mechanical properties of TiAl3 based on the multi-laminated Ti-(SiCP/Al) composite system

Cited by 29 publications

References 27 publications

Laminated Ti-Al composites: Processing, structure and strength

Laminated Ti-Al composites: Processing, structure and strength

Determination of the Young Modulus of Ti-TiAl₃Metallic Intermetallic Laminate Composites by Nano-Indentation

New insight into the structural, mechanical, electronic, and thermodynamic properties of the monoclinicTMAl₃‐type aluminides

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Effect of solid solution of Si on mechanical properties of TiAl3 based on the multi-laminated Ti-(SiCP/Al) composite system

Cited by 29 publications

References 27 publications

Laminated Ti-Al composites: Processing, structure and strength

Laminated Ti-Al composites: Processing, structure and strength

Determination of the Young Modulus of Ti-TiAl3Metallic Intermetallic Laminate Composites by Nano-Indentation

New insight into the structural, mechanical, electronic, and thermodynamic properties of the monoclinicTMAl3‐type aluminides

Contact Info

Product

Resources

About

Determination of the Young Modulus of Ti-TiAl₃Metallic Intermetallic Laminate Composites by Nano-Indentation

New insight into the structural, mechanical, electronic, and thermodynamic properties of the monoclinicTMAl₃‐type aluminides