Effect of Al Thin Film on Microstructure and Mechanical Properties of Diffusion-Bonded LY12/TC4 Joints

LY12/TC4 joints have wide applications in many industrial areas such as aerospace, nuclear and chemical industries. In the present study, TC4 alloy and LY12 alloy with and without aluminum thin film was produced under low temperature of 380 oC. The microstructure and mechanical properties of the joi...

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Bibliographic Details
Published in:Key engineering materials 2014-06, Vol.616, p.275-279
Main Authors: Luo, Qiang Guo, Hu, Xue Shu, Shen, Qiang, Zhang, Lian Meng
Format: Article
Language:English
Subjects:
Aircraft components
Aluminum base alloys
Fracture mechanics
Interlayers
Mechanical properties
Microstructure
Shear strength
Thin films
Titanium base alloys
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Summary:LY12/TC4 joints have wide applications in many industrial areas such as aerospace, nuclear and chemical industries. In the present study, TC4 alloy and LY12 alloy with and without aluminum thin film was produced under low temperature of 380 oC. The microstructure and mechanical properties of the joints were investigated. The addition of the Al thin interlayer had largely improved the interfacial microstructure and shear strength of the joints. The average shear strength of LY12/Al/TC4 joints was 64.3 MPa which was 2.5 times larger than the LY12/TC4 joints’ strength. The shear fracture mainly occurred on the interface of LY12 and TC4 from the XRD result of fracture surfaces.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.616.275