Microstructure, texture, and mechanical properties of Ti-6Al-4V joints by K-TIG welding

Influence of Welding Speeds on the Morphology, Mechanical Properties, and Microstructure of 2205 DSS Welded Joint by K-TIG Welding

“…Keyhole tungsten inert gas (K-TIG) welding is a kind of high-energy beam welding method. It can be welded in a single-pass welding and formed on both sides without filling the welding material [ 10 , 11 , 12 , 13 , 14 ]. In this paper, different welding speeds were applied to analyze the influence of cooling rate on morphology, mechanical properties, and microstructure of the 2205 DSS welds.…”

An Overview of TIG Welding of Ti6Al4V: Recent Developments

“…Joint preparation is a factor of the thickness of the metal. In welding of Ti6Al4V alloys, plates with thickness above 3 mm to undergo butt joint, requires edge preparation, in which a V groove is created to accommodate proper penetration [9,63]. Plates with rough edges tend to increase porosity in the weld.…”

“…Generally, Ti6Al4V alloy microstructure is made of the white granular β and the black equiaxed α, and the morphology and size of α colonies contribute to various mechanical properties of Ti6Al4V alloys [22,25,33,58], reducing the α colonies through the use of various thermo-mechanical processes improves fatigue crack nucleation resistance, toughness, ductility, yield strength, while poor ductility has been attributed to the large heat input and larger β grain size growth [1,16,22,58]. Within the FZ, there exist acicular α' and some secondary α morphology at the boundaries of prior β due to low cooling rate [9,25,74]. The microstructure within the HAZ consist of martensitic α' and α phase within the prior β grains, with increasing distance from the HAZ, the smaller β grains turn out to be less equiaxed and reduces in size.…”

“…The microstructure within the HAZ consist of martensitic α' and α phase within the prior β grains, with increasing distance from the HAZ, the smaller β grains turn out to be less equiaxed and reduces in size. There is also a gradient of prior β grain sizes spreading from the FZ/HAZ to the HAZ/BM margin [2,9,33]. Table 2 summaries the microstructure evolution in TIG welded Ti6Al4V alloy from the BM through the HAZ and the FZ.…”

“…Titanium and its alloys have predominately been a useful non-ferrous metal in numerous industries for years. The development of new and improved scientific approaches in engineering the titanium alloys over the years has further increased its uses in the biomedical, chemical, automobile, and aerospace sector [1][2][3][4][5][6][7][8][9][10]. The choice of this alloy over other types of alloys have been predominately due to some unique properties it possesses, some of these properties are low distortion rate during welding, fly-to-weight ratio, low corrosion rate, high meting point etc.…”