Mechanical and corrosion behavior of titanium alloys additively manufactured by selective laser melting – A comparison between nearly β titanium, α titanium and α + β titanium

Electrochemical Noise Analysis of the Corrosion of Titanium Alloys in NaCl and H2SO4 Solutions

“…Moreover, Ti alloys do not present damage on the surface [7,77]. Researchers have also found that titanium is not affected by pitting corrosion in salt media when the temperature is under 90 • C, that Cl − ions will not penetrate the surface of alloys, and that the alloy shows passivation [17,46,[78][79][80][81][82][83][84][85].…”

“…EIS results indicate that it is the same behavior, namely that Cl − ions have difficulty penetrating the passive layer, which could create instability on the layer, but it will show repassivation because it can present a diffusion process [43]. In electrolytes of chlorides of Na, Ca, and Mg, titanium presents a growth-passive layer; these electrolytes present instability of Tialloys near α, α + β and β, and phases differences [44][45][46]. In H 2 SO 4 electrolytes, Ti-alloys have shown a noble behavior by PP and a passivation system [47].…”

Enhancing Hardness and Wear Performance of Laser Additive Manufactured Ti6Al4V Alloy Through Achieving Ultrafine Microstructure

“…LAM-fabricated titanium alloy is often distinguished by coarse, columnar prior β grains due to the high temperature gradients [11,12] and fine lamellar or lath-like microstructure within prior β grains as a result of the high cooling rate [13,14]. In addition, LAM-fabricated titanium alloys often exhibit high strength due to refined microstructure and low ductility due to the high level of residual stress [7,[15][16][17][18].…”

The effect of friction welding on the mechanical properties and corrosion fatigue resistance of titanium alloy drill pipe

“…In this work, the FW process obviously weakens the protection performance of the passive film, suggesting that a less protective passive film was formed on the surface of FW sample. According to the literature, the titanium alloy composed of α phase shows better protection performance than the case composed of α + β phase, because the passive film on the later one is porous 46,47 . Microstructure observations in this work show that that the base material is mainly composed of equiaxed globular α (hcp)‐Ti, while the acicular α + β (bcc)‐Ti is dominant in the FW zone (Figure 4).…”