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Microstructure and mechanical property of laser melting deposition (LMD) Ti/TiAl structural gradient material

Qu, H.P. / Li, P. / Zhang, S.Q. / Li, A. / Wang, H.M.

AbstractThis article presents fabrication, microstructure and mechanical properties study of Ti/TiAl functional gradient material. Ti–47Al–2.5V–Cr/Ti–6Al–2Zr–Mo–V gradient material was successfully fabricated by the laser melting deposition (LMD) manufacturing process. Microstructure and chemical composition was characterized by OM, SEM, TEM and EPMA. The Vickers hardness and room-temperature tensile property was evaluated on longitudinal direction. Results showed that fully lamellar (FL) microstructure consisted of γ-TiAl and α2-Ti3Al was formed on the Ti–47Al–2.5V–Cr side, while coarse basket weave microstructure was formed on the Ti–6Al–2Zr–1Mo–1V side. No cracking was found in the gradient zone after aging at 800°C for 48h. The room-temperature tensile strength of the as-deposited specimen is up to approximately 1198.8MPa in the longitudinal direction, while the tensile elongation is approximately 0.4%, indicating a typical brittle fracture.

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Microstructure and mechanical property of laser melting deposition (LMD) Ti/TiAl structural gradient material

Qu, H.P. / Li, P. / Zhang, S.Q. / Li, A. / Wang, H.M.

AbstractThis article presents fabrication, microstructure and mechanical properties study of Ti/TiAl functional gradient material. Ti–47Al–2.5V–Cr/Ti–6Al–2Zr–Mo–V gradient material was successfully fabricated by the laser melting deposition (LMD) manufacturing process. Microstructure and chemical composition was characterized by OM, SEM, TEM and EPMA. The Vickers hardness and room-temperature tensile property was evaluated on longitudinal direction. Results showed that fully lamellar (FL) microstructure consisted of γ-TiAl and α2-Ti3Al was formed on the Ti–47Al–2.5V–Cr side, while coarse basket weave microstructure was formed on the Ti–6Al–2Zr–1Mo–1V side. No cracking was found in the gradient zone after aging at 800°C for 48h. The room-temperature tensile strength of the as-deposited specimen is up to approximately 1198.8MPa in the longitudinal direction, while the tensile elongation is approximately 0.4%, indicating a typical brittle fracture.

Microstructure and mechanical property of laser melting deposition (LMD) Ti/TiAl structural gradient material

Qu, H.P. / Li, P. / Zhang, S.Q. / Li, A. / Wang, H.M.

AbstractThis article presents fabrication, microstructure and mechanical properties study of Ti/TiAl functional gradient material. Ti–47Al–2.5V–Cr/Ti–6Al–2Zr–Mo–V gradient material was successfully fabricated by the laser melting deposition (LMD) manufacturing process. Microstructure and chemical composition was characterized by OM, SEM, TEM and EPMA. The Vickers hardness and room-temperature tensile property was evaluated on longitudinal direction. Results showed that fully lamellar (FL) microstructure consisted of γ-TiAl and α2-Ti3Al was formed on the Ti–47Al–2.5V–Cr side, while coarse basket weave microstructure was formed on the Ti–6Al–2Zr–1Mo–1V side. No cracking was found in the gradient zone after aging at 800°C for 48h. The room-temperature tensile strength of the as-deposited specimen is up to approximately 1198.8MPa in the longitudinal direction, while the tensile elongation is approximately 0.4%, indicating a typical brittle fracture.

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Title:

Microstructure and mechanical property of laser melting deposition (LMD) Ti/TiAl structural gradient material

Contributors:

Qu, H.P. (author) / Li, P. (author) / Zhang, S.Q. (author) / Li, A. (author) / Wang, H.M. (author)

Publication date:

2009-07-03

Size:

9 pages

ISSN:

DOI:

https://doi.org/10.1016/j.matdes.2009.07.004

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

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