Microstructure and mechanical properties of newly developed aluminum–lithium alloy 2A97 welded by fiber laser

Fu, Banglong; Qin, Guoliang; Meng, Xiangmeng; Ji, Yang; Zou, Yong; Zhao, Lei

doi:10.1016/j.msea.2014.08.038

Cited by 96 publications

(26 citation statements)

References 29 publications

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“…These overlapping lines are most notorious in Al-2.0 wt% Fe alloy that in Al-1.5 wt% magnification is observed a fine cellular structure with columnar growth, this result is similar to study realized by the authors Olakanmia et al [10] and Fu et al [11].…”

Section: Microstructural Studysupporting

confidence: 90%

The Alumina Film Nanomorphology Formed to Improve the Corrosion Resistance of Al-2.0 wt% Fe Alloy as Result of the Laser Surface Melting Technique Applied

Pariona¹,

Micene²

2017

ACES

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The laser surface remelting (LSR) treatment was performed to Al-2.0 wt% Fe alloy with a 2 kW Yb-fiber laser (IPG YLR-2000S). The substrate and laser-treated material characterization were executed using different techniques. Among them, the microstructure was analyzed by optical microscope, SEM, low-angle X-ray diffraction (LAXRD) and the corrosion test was made in aerated solution of 0.1 M H 2 SO 4 at a temperature of 25˚C ± 0.5˚C. As result was shown, the micrograph of LSR-treated material displaying can be a fine cellular structure and the existence of certain nanoporosities and a similar to a nano-dendritic growth was observed too. The characteristic of melted zone was constituted of metastable phases according to the result of x-rays and the behavior corrosion as a result of the LSR-treated sample, which it was shown to be more resistant to corrosion than the untreated sample. A comparative study was carried out of the cyclic polarization of the laser-treated and untreated samples, demonstrating that the reduction and oxidation reverse peaks were not observed and being the cyclic polarization behavior was of irreversible character in both samples, however, the LSR-treated sample propitious the passivity on the surface also reduced the corrosion phenomena. Wherefore, this type of laser-treated alloy can be applied in the aerospace, aeronautic and automobilist industries.

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Section: Microstructural Studysupporting

confidence: 90%

The Alumina Film Nanomorphology Formed to Improve the Corrosion Resistance of Al-2.0 wt% Fe Alloy as Result of the Laser Surface Melting Technique Applied

Pariona¹,

Micene²

2017

ACES

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“…In detail, the first to sixth optical fibers in Fig. 2 were corresponding to the detection positions numbered 10,9,8,7,5, and 6 in Fig. 3.…”

Section: Experimental Procedures 21 Experimental Set-upmentioning

confidence: 99%

“…Compared to conventional welding processes, laser welding process shows important advantages due to high power density, low heat input, low welding distortion, and high aspect ratio. Therefore, laser welding of aluminum alloy is an immediate area of research focus all around the world [3][4][5][6]. Owing to high heat conduction coefficient, low viscosity, high linear expansion coefficient, high reflectivity of the metal, and low boiling point of the alloying elements, there are various welding defects, including porosity, undercut and joint softening during laser welding of aluminum alloy [7,8].…”

Section: Introductionmentioning

confidence: 99%

Study on the burning loss of magnesium in fiber laser welding of an Al-Mg alloy by optical emission spectroscopy

Zhou

Zhang

Jin

et al. 2016

Int J Adv Manuf Technol

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In order to study the burning loss of magnesium, a specially designed device was used to capture the spectrum emitted from the keyhole plasma in deep penetration laser welding of aluminum alloy 5052. The content of magnesium in the weld bead was measured by an electron probe microanalyzer (EPMA). The effect of the welding parameters on the spectral intensity of magnesium plasma was examined, and the distributions of the spectral intensity of magnesium plasma in the radial and depth directions of the keyhole were investigated. Finally, the mechanism of the magnesium loss was analyzed. The results indicate that burning loss of magnesium can be monitored by spectral analysis technique. The welding parameters have a great effect on the burning loss of magnesium. The influence of welding speed on the burning loss of magnesium on the top surface is dependent on the penetration regime. The distribution of magnesium in the weld is not uniform. In the radial direction of the weld bead, the content of magnesium increases from the center to the edge of the keyhole. In the depth direction of the weld bead, the content of magnesium decreases firstly and then increases from the top to bottom. The maximum burning loss of magnesium occurs at the middle of the weld bead.

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“…Although there is a huge potential for LBW to be used in Al-Li alloys [16,17], the technique is not well understood currently. The welding parameters, keyhole dynamics, vapour and plasma characteristics, welding defects prevention and mechanical properties of the welded Al-Li alloy joints have been studied and reported in [18][19][20]. Porosity is a common defect encountered in the welds of aluminium alloys and is a critical problem in the LBW.…”

Section: Introductionmentioning

confidence: 99%

Effect of porosities on tensile properties of laser-welded Al-Li alloy: an experimental and modelling study

Liu

Lee

et al. 2017

Int J Adv Manuf Technol

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Aluminium-lithium (Al-Li) alloys are very attractive for aerospace applications due to their outstanding properties, such as high specific strength, high rigidity and good resistance to corrosion and fatigue, compared to conventional aluminium alloys. The butt joints of Al-Li 2A97-T3 alloy sheet produced by fibre laser welding with ER2319 filler wire were investigated in this paper. Uniaxial tensile tests have been performed to determine the nominal mechanical properties of the joints with and without porosities. In addition, a defect zone was defined in the welded specimens to investigate the effects of porosity on the joint tensile behaviour. The post-weld strength prediction (PWSP) model in a previous study has been extended by including the effects of the porosity in the welds to predict the overall response of the butt joints. The experimental and the modelling results show a good agreement, with the yield strength having a deviation lower than 5%. Both the yield strength and the ductility of the tensile specimens were observed to have decreased with the presence of porosities. The porosities aggravated the inhomogeneous deformation in the weld zone. Higher strain rate was found in the defect area than the remaining weld zone during plastic deformation, as the porosity in the specimen caused inhomogeneous deformation. It was found that this accelerated the failure of the specimen and lowered the global ductility significantly.

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Microstructure and mechanical properties of newly developed aluminum–lithium alloy 2A97 welded by fiber laser

Cited by 96 publications

References 29 publications

The Alumina Film Nanomorphology Formed to Improve the Corrosion Resistance of Al-2.0 wt% Fe Alloy as Result of the Laser Surface Melting Technique Applied

The Alumina Film Nanomorphology Formed to Improve the Corrosion Resistance of Al-2.0 wt% Fe Alloy as Result of the Laser Surface Melting Technique Applied

Study on the burning loss of magnesium in fiber laser welding of an Al-Mg alloy by optical emission spectroscopy

Effect of porosities on tensile properties of laser-welded Al-Li alloy: an experimental and modelling study

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