Journal ArticleDOI
Weldability of aluminium-lithium alloy 2090 using laser welding
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TLDR
In this article, the weldability of aluminium-lithium alloys is briefly reviewed using laser welding, and the quality of the welds is evaluated through mechanical tests and microscopical observations.Abstract:
Lithium-containing aluminium alloys are of considerable current interest in the aerospace and aircraft industries because lithium additions to aluminium improve the modulus and decrease the density compared to conventional aluminium alloys. Many such alloys are under development for aircraft applications, which usually involves mechanical fastening. While aluminium-lithium alloys are fusion weldable with gas metal arc, gas tungsten arc and electron beam processes, they suffer from problems of weld porosity, heat-tearing cracking, poor penetration and low joint efficiency. In this paper, the weldability of aluminium-lithium alloys is briefly reviewed. The weldability of commercial aluminium-lithium alloy 2090 in the peak-aged condition was studied using laser welding. The quality of the welds was evaluated through mechanical tests (hardness and tensile tests) and microscopical observations. Mechanical property data and microscopical observations of the welds on prior surface-prepared (milled) material revealed a low degree of the weld surface degradation and an absence of porosity. This coupled with the attractive joint efficiencies suggest the superiority of the laser welding to conventional arc welding of this alloy. The performance of laser-welded butt joints is rationalized.read more
Citations
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Journal ArticleDOI
Progress in joining of advanced materials
Gürel Çam,Mustafa Koçak +1 more
TL;DR: In this article, diffusion bonding and laser welding are considered for joining a wide range of materials of interest in the aerospace industry, as well as in many other industrial applications, and offer remarkable advantages over conventional fusion welding processes.
Journal ArticleDOI
Problems and issues in laser beam welding of aluminum–lithium alloys
Rongshi Xiao,Xinyi Zhang +1 more
TL;DR: In this article, the properties of Al-Li alloys and the characteristics of LBW are introduced, the formation and prevention of the main weld defects such as porosity and hot cracking are discussed, and then the weld microstructure and the joint mechanical properties are described in highlight.
Journal ArticleDOI
Laser beam welding of wrought aluminium alloys
TL;DR: In this paper, the effects of CO2 and Nd-YAG laser beam processing parameters and the properties of the most common wrought aluminium alloys on the characteristics of welded joints are discussed.
Journal ArticleDOI
Microstructure and mechanical properties of laser beam welded Al–Li alloy 2060 with Al–Mg filler wire
TL;DR: In this article, the fusion zone microstructure and joint mechanical properties were investigated for a newly developed high-strength Al-Li alloy Alloy 2060-T8 for applications in aircraft industry.
Journal ArticleDOI
Microstructure and mechanical properties of newly developed aluminum–lithium alloy 2A97 welded by fiber laser
TL;DR: In this paper, the weld appearance, microstructure, solute segregation, precipitate behavior, and their relationship with mechanical properties of welded joints were investigated, and sound joints with no crack and a few small porosities are obtained under appropriate heat inputs.
References
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Journal ArticleDOI
Aluminum-lithium alloys
TL;DR: The importance attached to the development of aluminum-lithium based alloys may be deduced from the fact that over the past seven years four major international conferences (1-4) have been devoted to these materials: The first was held at Stone Mountain, Georgia, in 1980 (1), and the most recent was in Paris in 1987 (4) as discussed by the authors.
Journal ArticleDOI
The effect of slip distribution on the monotonic and cyclic ductility of AlLi binary alloys
T.H. Sanders,E.A. Starke +1 more
TL;DR: In this paper, the authors correlated the monotonic and cyclic properties of three AlLi alloys with the slip behavior and found that cracks nucleated at grain boundary ledges during tensile tests and propagated either transgranularly or intergranularally along precipitate free zones.
Journal ArticleDOI
Aluminium powder metallurgy technology for high-strength applications
TL;DR: A literature survey of aluminium powder metallurgy (PM) for high-strength applications was undertaken in this article, with particular emphasis on high strength, corrosion-resistant alloys and alloys developed for use at elevated temperatures.
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