Microstructure and mechanical properties of Cf/Al-TiAl laser-assisted brazed joint

Guangjie Feng; Zhuoran Li; Zhi Zhou; Yong Yang; Dusan P. Sekulic; Michael R. Zachariah

doi:10.1016/j.jmatprotec.2017.12.017

Microstructure and mechanical properties of C_f/Al-TiAl laser-assisted brazed joint

Guangjie Feng, Zhuoran Li, Zhi Zhou, Yong Yang, Dusan P. Sekulic, Michael R. Zachariah

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

11 Scopus citations

Abstract

A high-efficiency brazing method was developed to join C_f/Al composites to TiAl alloys with the assistance of laser-induced exothermic reaction of a Ni-Al-Zr interlayer. The microstructure and mechanical properties of the C_f/Al-TiAl joint were investigated. The joint interfacial structure represented TiAl alloys/Al₃NiTi₂/NiAl+Ni-Al-Zr+Al-Cu-Ti+Ag(s,s)/(Ni,Ti,Zr)Al₃/C_f/Al composites. A ∼ 400 nm thick Ti and Zr rich layer was formed around carbon fibers, largely enhancing the bonding quality on the C_f/Al side. The thickness of AgCu foils on each side and the brazing pressure influenced the interfacial reactions and the joint morphology. When the thickness of AgCu foils was 100 μm and the brazing pressure was 4 MPa, the joint was free of defects, and had a maximum shear strength of 71.6 MPa.

Original language	English
Pages (from-to)	195-203
Number of pages	9
Journal	Journal of Materials Processing Technology
Volume	255
DOIs	https://doi.org/10.1016/j.jmatprotec.2017.12.017
State	Published - May 2018

Bibliographical note

Publisher Copyright:
© 2017 Elsevier B.V.

Funding

The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China under grant no. 51075101 . Guangjie Feng acknowledges the support from the China Scholarship Council for 1 year’s study at the University of Maryland, College Park. DPS acknowledges the support through the Distinguished 1000 Plan Foreign Professor appointment at the Harbin Institute of Technology, PR China.

Funders	Funder number
National Natural Science Foundation of China (NSFC)	51075101
National Natural Science Foundation of China (NSFC)
Harbin Institute of Technology, Harbin, China
China Scholarship Council

Keywords

Brazing
C/Al composites
Mechanical properties
Microstructures
Self-propagating high-temperature synthesis
TiAl alloys

ASJC Scopus subject areas

Ceramics and Composites
Computer Science Applications
Metals and Alloys
Industrial and Manufacturing Engineering

Access to Document

10.1016/j.jmatprotec.2017.12.017

Cite this

@article{191f6db9704e48ef8b1825581c711679,

title = "Microstructure and mechanical properties of Cf/Al-TiAl laser-assisted brazed joint",

abstract = "A high-efficiency brazing method was developed to join Cf/Al composites to TiAl alloys with the assistance of laser-induced exothermic reaction of a Ni-Al-Zr interlayer. The microstructure and mechanical properties of the Cf/Al-TiAl joint were investigated. The joint interfacial structure represented TiAl alloys/Al3NiTi2/NiAl+Ni-Al-Zr+Al-Cu-Ti+Ag(s,s)/(Ni,Ti,Zr)Al3/Cf/Al composites. A ∼ 400 nm thick Ti and Zr rich layer was formed around carbon fibers, largely enhancing the bonding quality on the Cf/Al side. The thickness of AgCu foils on each side and the brazing pressure influenced the interfacial reactions and the joint morphology. When the thickness of AgCu foils was 100 μm and the brazing pressure was 4 MPa, the joint was free of defects, and had a maximum shear strength of 71.6 MPa.",

keywords = "Brazing, C/Al composites, Mechanical properties, Microstructures, Self-propagating high-temperature synthesis, TiAl alloys",

author = "Guangjie Feng and Zhuoran Li and Zhi Zhou and Yong Yang and Sekulic, \{Dusan P.\} and Zachariah, \{Michael R.\}",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2018",

month = may,

doi = "10.1016/j.jmatprotec.2017.12.017",

language = "English",

volume = "255",

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AU - Feng, Guangjie

AU - Li, Zhuoran

AU - Zhou, Zhi

AU - Yang, Yong

AU - Sekulic, Dusan P.

AU - Zachariah, Michael R.

PY - 2018/5

Y1 - 2018/5

N2 - A high-efficiency brazing method was developed to join Cf/Al composites to TiAl alloys with the assistance of laser-induced exothermic reaction of a Ni-Al-Zr interlayer. The microstructure and mechanical properties of the Cf/Al-TiAl joint were investigated. The joint interfacial structure represented TiAl alloys/Al3NiTi2/NiAl+Ni-Al-Zr+Al-Cu-Ti+Ag(s,s)/(Ni,Ti,Zr)Al3/Cf/Al composites. A ∼ 400 nm thick Ti and Zr rich layer was formed around carbon fibers, largely enhancing the bonding quality on the Cf/Al side. The thickness of AgCu foils on each side and the brazing pressure influenced the interfacial reactions and the joint morphology. When the thickness of AgCu foils was 100 μm and the brazing pressure was 4 MPa, the joint was free of defects, and had a maximum shear strength of 71.6 MPa.

AB - A high-efficiency brazing method was developed to join Cf/Al composites to TiAl alloys with the assistance of laser-induced exothermic reaction of a Ni-Al-Zr interlayer. The microstructure and mechanical properties of the Cf/Al-TiAl joint were investigated. The joint interfacial structure represented TiAl alloys/Al3NiTi2/NiAl+Ni-Al-Zr+Al-Cu-Ti+Ag(s,s)/(Ni,Ti,Zr)Al3/Cf/Al composites. A ∼ 400 nm thick Ti and Zr rich layer was formed around carbon fibers, largely enhancing the bonding quality on the Cf/Al side. The thickness of AgCu foils on each side and the brazing pressure influenced the interfacial reactions and the joint morphology. When the thickness of AgCu foils was 100 μm and the brazing pressure was 4 MPa, the joint was free of defects, and had a maximum shear strength of 71.6 MPa.

KW - Brazing

KW - C/Al composites

KW - Mechanical properties

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KW - Self-propagating high-temperature synthesis

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