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

H. P. Qu; P. Li; S. Q. Zhang; A. Li; H. M. Wang

doi:10.1016/j.matdes.2009.07.004

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

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

Beihang University

Research output: Contribution to journal › Article › peer-review

127 Scopus citations

Abstract

This 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 48 h. The room-temperature tensile strength of the as-deposited specimen is up to approximately 1198.8 MPa in the longitudinal direction, while the tensile elongation is approximately 0.4%, indicating a typical brittle fracture.

Original language	English
Pages (from-to)	574-582
Number of pages	9
Journal	Materials and Design
Volume	31
Issue number	1
DOIs	https://doi.org/10.1016/j.matdes.2009.07.004
State	Published - Jan 2010
Externally published	Yes

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

abstract = "This 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 48 h. The room-temperature tensile strength of the as-deposited specimen is up to approximately 1198.8 MPa in the longitudinal direction, while the tensile elongation is approximately 0.4\%, indicating a typical brittle fracture.",

author = "Qu, \{H. P.\} and P. Li and Zhang, \{S. Q.\} and A. Li and Wang, \{H. M.\}",

year = "2010",

month = jan,

doi = "10.1016/j.matdes.2009.07.004",

language = "英语",

volume = "31",

pages = "574--582",

journal = "Materials and Design",

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}

TY - JOUR

T1 - Microstructure and mechanical property of laser melting deposition (LMD) Ti/TiAl structural gradient material

AU - Qu, H. P.

AU - Li, P.

AU - Zhang, S. Q.

AU - Li, A.

AU - Wang, H. M.

PY - 2010/1

Y1 - 2010/1

N2 - This 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 48 h. The room-temperature tensile strength of the as-deposited specimen is up to approximately 1198.8 MPa in the longitudinal direction, while the tensile elongation is approximately 0.4%, indicating a typical brittle fracture.

AB - This 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 48 h. The room-temperature tensile strength of the as-deposited specimen is up to approximately 1198.8 MPa in the longitudinal direction, while the tensile elongation is approximately 0.4%, indicating a typical brittle fracture.

UR - https://www.scopus.com/pages/publications/69549095703

U2 - 10.1016/j.matdes.2009.07.004

DO - 10.1016/j.matdes.2009.07.004

M3 - 文章

AN - SCOPUS:69549095703

SN - 0264-1275

VL - 31

SP - 574

EP - 582

JO - Materials and Design

JF - Materials and Design

IS - 1

ER -

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

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