A comparative study of electrochemical corrosion behavior in Laser and TIG welded Ti–5Al–2.5Sn alloy

Shamir, Muhammad; Junaid, Massab; Khan, Fahd Nawaz; Taimoor, Aqeel Ahmad; Baig, Mirza Nadeem

doi:10.1016/j.jmrt.2017.09.006

Cited by 16 publications

(3 citation statements)

References 33 publications

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“…For example, the α' phase in the β phase accelerates the corrosion of titanium alloys [6]. In addition, pitting mainly occurs on the α' grains to form the stressed surface, and the combined action of stress and impurity oxidation induces stress corrosion and the formation of a porous passive layer in the joint [7]. Although titanium alloys form passivation films during service in the marine environment, the films can rupture under high hydrostatic pressure, resulting in stress corrosion [8].…”

Section: Introductionmentioning

confidence: 99%

Effects of Micro-Arc Oxidation Surface Treatment on the Corrosion Resistance of Ti-6Al-4V Electron-Beam-Welded Joints

Mei

et al. 2023

Metals

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Micro-arc oxidation (MAO) is performed on Ti-6Al-4V electron-beam-welded joints, and the microstructure, phase composition, and corrosion resistance of the joint and surface coating are investigated systematically by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), as well as electrochemical and stress corrosion analyses. SEM analyses revealed that the joint undergoes a phase transformation. The coating morphology of the joint and base materials is similar, but the joint coating is denser and thicker. XRD analyses recognize the rutile and anatase phases in the coating. Polarization and electrochemical impedance spectroscopy (EIS) corrosion tests reveal that the MAO treatment results in a decrease of two orders of magnitude in the corrosion current density of the welded joint and an increment of corrosion resistance. Stress corrosion evaluation reveals that a dense layer is exposed to protect the joint after long-term exposure to a high-stress corrosion environment. No stress corrosion-induced cracking or defects are observed in the joints, indicating the corrosion resistance of the joint has significantly improved.

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Section: Introductionmentioning

confidence: 99%

Effects of Micro-Arc Oxidation Surface Treatment on the Corrosion Resistance of Ti-6Al-4V Electron-Beam-Welded Joints

Mei

et al. 2023

Metals

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“…Titanium alloys have also been used widely in chemical processing, sports components, and marine applications [4]. Ti5Al2.5Sn has superior creep properties compared to Ti6Al4V and titanium alloys [5][6][7]. Welding is the most prevalent process for producing complicated structural elements made of titanium alloys [8].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Analysis of the Influence of Welding Current on Microstructure and Mechanical Properties in TIG Welded Ti5Al2.5Sn Alloy

Ur Rehman,

Nawaz Khan,

Asif

et al. 2023

Digit. Manuf. Technol.

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Tungsten inert gas (TIG) welding was performed on a 1.6 mm thick Ti5Al2.5Sn alloy sheet to analyze the influence of welding current on the resultant microstructure and mechanical properties in the weldments. Fusion zone (FZ) width was observed to increase with increasing the welding current. The heat-affected zone (HAZ) showed acicular α, primary α and α' martensite phases depending upon the cooling rate. FZ was comprised of α´ martensite at the high cooling rate, acicular α at a low cooling rate and some retained β. The ultimate tensile strength (UTS), notch tensile strength (NTS) and impact toughness in all the weldments increased from 754 MPa to 810 MPa, 703 MPa to 785 MPa, and 2.3 J to 3.3 J, respectively, by increasing the welding current. However, percentage elongation decreased from 10% to 6.5% by increasing the welding current from 12 A to 18 A. Moreover, the impact toughness value was observed to increase by increasing welding current owing to the formation of a higher proportion in acicular α, α' martensite phases within the FZ. Furthermore, higher microhardness was achieved at higher currents.

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“…As a strong electrolyte, seawater is corrosive to metal materials [14]. Zhao et al [15] studied the corrosion behavior in HAZ of FH32 steel in 3.5 wt% NaCl solution and found that the CGHAZ showed the worst corrosion resistance because the corrosion sensitivity of its microstructure is relatively high.…”

Section: Introductionmentioning

confidence: 99%

Study on Corrosion Resistance and Hydrogen Permeation Behavior in Inter-Critically Reheated Coarse-Grained Heat-Affected Zone of X80 Pipeline Steel

Zhao

Xiao

et al. 2022

Metals

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We studied the effects of peak temperature and cooling rate in the secondary welding thermal cycles on the martensite/austenite (M/A) constituents’ characteristics (including fraction, average size and distribution), corrosion resistance and hydrogen permeation behaviors in the inter-critically reheated coarse-grained heat-affected zone (ICCGHAZ) of X80 pipeline steel. We observed that the M/A constituents’ characteristics mainly depend on the secondary peak temperature and cooling rates, while the microstructure style and prior austenite grain size are dependent on the first peak temperature. In addition, the variations in the M/A constituents’ characteristics result in different corrosion resistance and hydrogen permeation behaviors by changing the micro-galvanic effect and the number of hydrogen trapping sites. The high fraction and coarse grain size of M/A constituents are against the corrosion resistance and hydrogen permeation in ICCGHAZs, and their functional relationships are established. Moreover, the effects of the fraction of M/A constituents on the corrosion resistance and hydrogen permeation behaviors are much greater than those of the average size.

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A comparative study of electrochemical corrosion behavior in Laser and TIG welded Ti–5Al–2.5Sn alloy

Cited by 16 publications

References 33 publications

Effects of Micro-Arc Oxidation Surface Treatment on the Corrosion Resistance of Ti-6Al-4V Electron-Beam-Welded Joints

Effects of Micro-Arc Oxidation Surface Treatment on the Corrosion Resistance of Ti-6Al-4V Electron-Beam-Welded Joints

A Comparative Analysis of the Influence of Welding Current on Microstructure and Mechanical Properties in TIG Welded Ti5Al2.5Sn Alloy

Study on Corrosion Resistance and Hydrogen Permeation Behavior in Inter-Critically Reheated Coarse-Grained Heat-Affected Zone of X80 Pipeline Steel

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