Research status of laser cladding on titanium and its alloys: A review

Corrosion behavior of selective laser melted Ti-6Al-4 V alloy in NaCl solution

https://ro.ecu.edu.au/cgi/viewcontent.cgi?article=3150&context=ecuworkspost2013

Distinction in corrosion resistance of selective laser melted Ti-6Al-4V alloy on different planes

Prospects of laser beam welding and friction stir welding processes for aluminum airframe structural applications

Mechanical properties of a Ti6Al4V porous structure produced by selective laser melting

Microstructure, microhardness and corrosion resistance of remelted TiG2 and Ti6Al4V by a high power diode laser

Comparison of Ti-5Al-5V-5Mo-3Cr Welds Performed by Laser Beam, Electron Beam and Gas Tungsten Arc Welding

In this chapter, laser welding procedures employed in the literature to join aluminium and titanium alloys are reviewed. The chapter is divided into two main sections, comprising reviews of the literature on laser welding of aluminium alloys and titanium alloys, respectively. Each of these sections has an introductory part in which general concepts and specific properties influencing the weldability of alloys are described. Subsequently, the main experimental details of the reviewed papers are reported, including description of the laser equipment, welding modes, powers and processing rates, shielding gas, superficial pre-treatments of samples, etc. The microstructure, main defects, mechanical properties and corrosion behaviour of the weld beads are also reviewed. The main objective of this chapter is to introduce the reader to the latest results obtained in the literature regarding laser welding of these two light alloys, emphasising the most influential factors for each alloy.

Laser welding of light metal alloys: aluminium and titanium alloys

In the present study, Ti6Al4V samples have been welded under conduction regime by means of a high power diode laser. The main objective of the work has been to determine the actual influence of the surface pre-treatments on the laser welding process. Thus, six different pre-treatments were applied to Ti6Al4V samples before performing bead-on-plate and butt welding treatments. The depth, width, microstructure, and microhardness of the different weld zones were deeply analyzed. Grinding, sandblasting, and chemical cleaning pre-treatments lead to welds with the highest depth values, presenting high joint strengths. Treatments based on the application of dark coatings generate welds with lower penetration and worse mechanical properties, specially the graphite-based coating.

Influence of Surface Pre-treatments on Laser Welding of Ti6Al4V Alloy

Laser Beam Welding (LBW) is an advanced process to join materials with a laser beam of high energy density. LBW is especially suitable to join titanium alloys, as it allows high localization and low size of the melting pool, reducing considerably the energy of the process, in comparison with other welding technologies. Among the two widely known welding regimes, conduction and keyhole, the former is claimed to be a viable alternative to keyhole, mainly because it is a very stable process, provides high-quality welds free of defects, and involves lower laser cost. In the present work, a Finite Element Method (FEM) has been developed to simulate the LBW of Ti6Al4V alloy under conduction regime. The “Goldak double ellipsoid model” has been taken for the first time to simulate this LBW conduction process. In order to refine and validate the model, experimental conduction welding tests were performed on Ti6Al4V pieces with a high-power diode laser. Microstructural analyses and hardness measurements were also performed on the laser weld beads to identify the generated phases. Distortion and residual stresses were also obtained from the FEM simulations. An excellent agreement between the simulation and experimental results was found regarding the bead morphology and phase transformations.

M. R. Amaya-Vázquez

Papers

Microstructure, microhardness and corrosion resistance of remelted TiG2 and Ti6Al4V by a high power diode laser

Comparison of Ti-5Al-5V-5Mo-3Cr Welds Performed by Laser Beam, Electron Beam and Gas Tungsten Arc Welding

Laser welding of light metal alloys: aluminium and titanium alloys

Influence of Surface Pre-treatments on Laser Welding of Ti6Al4V Alloy

FEM Simulation and Experimental Validation of LBW Under Conduction Regime of Ti6Al4V Alloy