Studies on SPF/DB Technology of Aluminum-Lithium Alloys

Song, Fei; Mao, Weiji; Zhu, Y.Y.

doi:10.4028/www.scientific.net/msf.243-245.701

Cited by 3 publications

(1 citation statement)

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“…The Al-Li alloy has become a promising member of aerospace used aluminum alloys due to its low density, high specific strength, good corrosion resistance, and excellent superplastic forming performance [1][2][3]. In recent years, the multilayer lightweight structural components obtained by the superplastic forming/diffusion bonding (SPF/DB) technology has been widely used in the aerospace industry [4][5][6]. Therefore, the development of DB/SPF technology for the Al-Li alloy is of great significance to further recommend the integration and lightweight of aircraft components and reduce flight costs.…”

Section: Introductionmentioning

confidence: 99%

Diffusion Bonding of 1420 Al–Li Alloy Assisted by Pure Aluminum Foil as Interlayer

Chen

Zhao

et al. 2020

Materials

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The Al–Li alloy is becoming popular for aerospace application owing to their low density, high specific strength, good corrosion resistance, etc. The diffusion bonding/superplastic forming (DB/SPF) structure of titanium alloy has been widely used in the aerospace industry. In order to broaden the application of Al–Li alloy, it is necessary to develop its diffusion bonding and superplastic forming (DB/SPF) technology. In the present study, diffusion bonding of 1420 Al–Li alloy assisted by pure aluminum foil was conducted on Gleeble-3500 thermal simulation system under different bonding parameters, the results show that the bonding temperatures have direct influence on the interface microstructure and bond strength of joints. Meanwhile, when the pure aluminum interlayer was introduced into the diffusion bonding process, the alloying element diffusion across the bond can improve the interface integrity and the mechanical properties. The joint formation mechanism with interlayer was investigated in detail, the development and application of this method was explored.

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