Journal ArticleDOI
The weld quality improvement via laser cleaning pre-treatment for laser butt welding of the HSLA steel plates
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In this paper, the weld quality influence of laser cleaning pre-treatment for the succeeding laser welding of the widely used industrial HSLA steel plates has been investigated in this work.Abstract:
Laser cleaning technology for pre-weld and post-weld treatments is a promising market due to its high efficiency and consistency, easy operation, and eco-friendly features. The weld quality influence of laser cleaning pre-treatment for the succeeding laser welding of the widely used industrial HSLA steel plates has been investigated in this work. The experimental results show that the laser cleaning pre-treatment can effectively remove the rusting and grease from the workpiece surface, create a corrugated micro-groove texture which could increase the absorption rate of the laser beam energy, help avoid the occurrence of pores and cracks in the weld, and significantly increase the mechanical properties of laser butt welding joints (30% for the tensile strength, 200% for the elongation). These experimental results should be helpful for developing hybrid laser cleaning & welding technologies for the emerging high-performance weld applications in practices.read more
Citations
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Nanosecond laser cleaning for enhanced zinc coating quality of HSLA steel
TL;DR: In this article, the influence of nanosecond laser cleaning created surface textures on hot-dip galvanizing coating quality of industrial HSLA steel plate has been investigated, and the results show that the zinc coating of the sample with laser cleaning pretreatment is more uniform, bright and no-defect as compared to the traditional pickling process treated sample.
Journal ArticleDOI
Nanosecond pulsed laser cleaning of titanium alloy oxide films: Modeling and experiments
TL;DR: In this paper , a 3D finite element model (FEM) was used to predict the surface temperature during laser cleaning, and the macroscopic morphology of the FEM was verified using digital ultra-depth-of-field microscopy (OM).
Journal ArticleDOI
Effect of narrow pulse width laser cleaning on corrosion resistance of A5083-H111 aluminum alloy
TL;DR: In this article, a 2 ns laser cleaning was used to remove the oxide layer on the aluminum alloy surface while retaining an excellent corrosion resistance and smooth surface, which retards the diffusion of oxygen into the substrate and hence increases the corrosion resistance of the surface.
Journal ArticleDOI
Insights into the microstructure evolution and crystallographic texture of API X-65 steel/UNS S32750 stainless steel dissimilar welds by EBSD analysis
TL;DR: In this paper, the microstructural features and microtexture evolution of API X-65 steel welded to UNS S32750 stainless steel were evaluated by means of the electron backscatter diffraction analysis.
Journal ArticleDOI
Cleaning of Graphite Particles Embedded in the Surface of Ductile Iron by Using a Novel Method
TL;DR: In this paper, a laser cleaning technique was developed to remove graphite particles implanted in the surface of ductile iron by using a pulsed Nd: YAG laser, and the optimized laser cleaning parameters were obtained to achieve high-quality cleaning effect and avoid the formation of the oxide layer.
References
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Journal ArticleDOI
Influence on the strength and aging resistance of aluminium joints by laser pre-treatment and surface modification
TL;DR: In this paper, the surface pre-treatment of the wrought aluminium alloy AW 6016 was performed using a laser to examine the influence of selected pretreatment parameters on the strength and aging resistance of the bonded joint.
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Laser cleaning of steel for paint removal
TL;DR: Wang et al. as discussed by the authors used this environmentally friendly technique to overcome the problems of conventional blasting, which always has intrinsic problems, such as noise, explosion risk, contaminant particles, vibration, and dust.
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Laser welding of Ti–6Al–4V to Nitinol
TL;DR: In this article, an experimental work with pulsed Nd:YAG laser was performed for dissimilar welding of Ti-6Al-4V and Nitinol and the results indicated that insertion of copper interlayer has a great influence on the reduction of the amount of Ti 2 Ni brittle intermetallic phase, elimination of transverse cracks through the weld metal and eventually improvement of mechanical properties of the joints.
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A theoretical model for laser removal of particles from solid surfaces
TL;DR: In this paper, a theoretical model for laser cleaning of microparticles from solid surfaces was established by taking the adhesion force (van der Waals force) and cleaning force (due to thermal expansion) into account.
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Investigation on mechanism of oxide removal and plasma behavior during laser cleaning on aluminum alloy
TL;DR: In this paper, the authors compared the cleaning effect of aluminum alloy at different energy densities and established the model of materials thermodynamics, illuminating the cleaning mechanism and plasma behavior, and showed that laser cleaning could remove oxide layer completely.