Tensile and fatigue properties of electron beam welded dissimilar joints between Ti–6Al–4V and BT9 titanium alloys

Effect of laser beam offset on microstructure and mechanical properties of pulsed laser welded BTi-6431S/TA15 dissimilar titanium alloys

“…Wang et al [4] reported that two microhardness sub-regions could be identified in the FZ. This was a result of the different chemistry contents.…”

“…The joining of dissimilar titanium alloys can achieve the desired properties, and it can also result in the efficient utilization of each material and save on expenditure. Research on the welding of dissimilar titanium alloys has been conducted [3][4][5][6]. Recently, a new type of Ti-Al-Sn-Zr-Mo-Nb-W-Si series high temperature titanium alloy, BTi-6431S, has become the focus of attention as a potential material for aircraft engine applications.…”

Features of the structural phase state of a weld produced by electron-beam welding in the submicrocrystalline grade 2 titanium alloy

“…The samples were pre-cleaned and clamped in a special tool in such a way to avoid contact of the weld zone with the tool, for welding in a vacuum chamber of an ELS-0,5-6 industrial-scale plant. Electron beam welding of the samples was performed by a plasma cathode electron gun [7] with an accelerating voltage (V) of 28 kV, beam current (In) of (I n ) 35 mA, focus coil current up to 551 mA and a beam travel speed of 25 mm/s.…”

“…Its advantage is the possibility of welding in the atmosphere rather than in vacuum as in the case of electron-beam welding [5,6]. As compared to electron-beam welding, laser welding is often associated with a higher degree of energy concentration, while the development of the electron-beam technique using plasma cathodes [7] allows highly focused electron beams to be generated. It is important here that the features of structural and phase transitions in welding of titanium alloys are associated with high heating and cooling rates, as well as with polymorphous transitions → which are typical of titanium alloys.…”

A comparative study on the cyclic plasticity and fatigue failure behavior of different subzones in CrNiMoV steel welded joint

“…The strain-controlled low cycle fatigue (LCF) and the stress-controlled ratcheting are the major cyclic deformation phenomena under cyclic loadings [5]. In the last several decades, extensively research works on the strain-controlled LCF behavior of welded joints have been published [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Taking the joints as bulk material, the cyclic hardening/softening features and the fatigue strength of several homogenous welded joints (with base metal of Ti6Al4V [6], 9-12% Cr steel [7][8], 7075Al alloy [9], Ni based alloy 617 [4], etc.)…”