Journal ArticleDOI
Combined effect of inoculation and magnetic arc oscillation on microstructure and tensile behaviour of type 2090 Al–Li alloy weld fusion zones
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TLDR
In this article, a type 2090 Al-Li alloy was gas tungsten arc welded with two different filler materials corresponding to types 2319 (Al 6.3Cu) and 4043 (Al 5.2Si).Abstract:
In the development of Al–Li alloys for aerospace structures, their behaviour during welding plays an important role. One way of improving weldability is to refine weld solidification structures, which can be achieved by a variety of means. In this work, a type 2090 Al–Li alloy was gas tungsten arc welded with two different filler materials corresponding to types 2319 (Al–6.3Cu) and 4043 (Al–5.2Si). Inoculation with titanium together with arc oscillation through an imposed alternating magnetic field was used to refine the weld fusion zone microstructures. Post-weld aging and tensile testing were employed to assess possible improvements in performance. It was found that the combined treatment of inoculation and magnetic oscillation resulted in fully equiaxed, fine grained structures and that this led to a noticeable increase in aging response and tensile properties, especially ductility.read more
Citations
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Solidification and liquation cracking issues in welding
TL;DR: In this paper, the authors reviewed two types of cracking, including the factors that affect cracking and the remedies, and proposed a method to deal with the problems of these two types.
Journal ArticleDOI
Effect of beam oscillating pattern on weld characterization of laser welding of AA6061-T6 aluminum alloy
TL;DR: In this article, three beam oscillating patterns that are transversal, longitudinal and circular were studied to join 4mm-thick AA6061-T6 aluminum alloy in butt configuration.
Journal ArticleDOI
Grain refining by ultrasonic stirring of the weld pool
Tao Yuan,Sindo Kou,Z. Luo +2 more
TL;DR: In this paper, an ultrasonic grain refining method was proposed to improve the mechanical properties and solidification-cracking resistance of arc welds of Mg alloys AZ31 Mg and AZ91 Mg.
Journal ArticleDOI
Microstructure and mechanical properties of Sc modified Al–Cu alloy (AA2219) electron beam welds
P. C. Seshagiri,G. Madhusudan Reddy,K. Srinivasa Rao,M. Govinda Raju,Subramshu S. Bhattacharya,K. Prasad Rao +5 more
TL;DR: In this article, the formability of YAG and diode laser welded blanks of a dual phase (DP) steel with banded martensite was investigated by using limiting dome height (LDH) testing method.
Journal ArticleDOI
Effects of electron beam oscillation techniques on solidification behaviour and stress rupture properties of Inconel 718 welds
TL;DR: In this article, the effects of electron beam oscillation techniques (sinusoidal, square, triangular, ramp, circle and elliptical) in controlling Nb segregation, Laves formation and stress rupture behaviour of Inconel 718 electron beam welds are studied.
References
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Journal ArticleDOI
Fusion zone grain refinement in aluminum alloy welds through magnetic arc oscillation and its effect on tensile behavior
TL;DR: In this paper, gas tungsten arc welds were produced in two high strength, age hardenable aluminum alloys with and without an external magnetic field, and the decrease in grain size was found to increase tensile elongation, while the effect on strength and age hardening response was only meager.
Journal ArticleDOI
Nondentritic Equiaxed Zone Formation in Aluminum-Lithium Welds
Journal ArticleDOI
Electron-beam weld solidification structures and properties in Al3LiX alloys
D.M. Bowden,P.J. Meschter +1 more
TL;DR: In this article, the effects of various additions to binary Al-3Li on electron-beam weld solidification structures and tensile properties were examined, including Zr for grain refinement, Mg for solid solution strengthening, Cu for precipitation strengthening, and Co for dispersion strengthening.