Stress-Corrosion and Corrosion-Fatigue Properties of Surface-Treated Aluminium Alloys for Structural Applications

Olugbade, Temitope Olumide; Omiyale, Babatunde Olamide; Ojo, Oluwole Timothy; Adeyeri, Michael Kanisuru

doi:10.1007/s42250-023-00606-6

Cited by 10 publications

(2 citation statements)

References 127 publications

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“…Unfortunately, plates with a thickness of no more than 3 mm can be welded in a single pass with the available welding techniques used in shipbuilding [43][44][45][46][47]. Usually, for plates with a thickness of more than 3 mm consisting of products made from aluminium alloys, several passes are required (two or more) to achieve fully penetrated welds.…”

Section: Introductionmentioning

confidence: 99%

Improving the Formation and Quality of Weld Joints on Aluminium Alloys during TIG Welding Using Flux Backing Tape

Mannapovich,

Touileb

2024

Metals

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This work aimed to compare the quality and properties of the welded joints of AMg6 aluminium alloy produced via conventional TIG welding with the properties of those produced with flux backing tape. This study focussed on the relative length of oxide inclusions (Δoi) and the amount of the excess root penetration (hroot) of the AMg6 alloy weld beads. The results show the influence of the thickness of the flux layer of the backing tape on the formation and quality on the AMg6 alloy welds, along with the effect of flux backing tape and edge preparation on the mechanical properties of the 6 and 8 mm thick welded plates. In accordance with the results obtained, the joints produced by means of TIG welding with flux back backing tape and without edge preparation have higher mechanical properties. Moreover, the TIG welding of AMg6 alloy using flux backing tape reduces the total welding time by 55%, reduces filler wire consumption by 35%, reduces shielding gas consumption by 43% and electricity consumption by 60% per 1 linear meter of the weld line.

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Section: Introductionmentioning

confidence: 99%

Improving the Formation and Quality of Weld Joints on Aluminium Alloys during TIG Welding Using Flux Backing Tape

Mannapovich,

Touileb

2024

Metals

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“…Research on corrosion fatigue includes corrosion fatigue life prediction and the influence of frequency, stress amplitude, stress ratio, corrosion medium, temperature, etc., on corrosion fatigue life [13][14][15][16][17][18][19][20][21][22][23][24][25][26]. Researchers have proposed the Paris model and the Form model for prediction of fatigue life of sucker rods and the method for estimating fatigue characteristics by measuring mechanical properties of sucker rod materials [27,28].…”

Section: Introductionmentioning

confidence: 99%

Low-Frequency Corrosion Fatigue Test Study of Sucker Rods under High-Salinity Well Fluids in Deep CBM Wells

Zhang,

Jing,

et al. 2023

Processes

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Corrosion fatigue test is the most direct and effective method to study the corrosion fatigue characteristics of sucker rod. At present, the commonly used test method is the high frequency fatigue test, but the working state of sucker rod is typical low-frequency and high-cycle corrosion fatigue, and the test with high frequency will reduce the impact of corrosion. Alloy steel 4330 is widely used in coalbed gas well high strength sucker rod, but the research on its low frequency corrosion fatigue life is relatively few. Therefore, in this paper, the corrosion fatigue test method of axial low-frequency and high-cycle was adopted to study the corrosion fatigue characteristics of 4330 steel sucker rod through the corrosion fatigue test under different typical corrosion media, temperature, and stress levels. The results show that the fatigue life of 4330 sucker rod drops sharply when the Cl− concentration in high salinity well fluid exceeds the threshold value of 155 mg/L. When this threshold is exceeded, the downward trend slows down. It can be seen that the significant factor affecting the corrosion fatigue life of 4330 material is not the concentration of Cl−, but the existence of Cl−. The presence of HCO3− promotes a further decrease in the corrosion fatigue life of the 4330 sucker rod by Cl−. The corrosion fatigue life of 4330 sucker rod decreases with the increase of temperature. When the well fluid temperature is less than 50 °C, the impact is relatively significant. When the well fluid temperature is more than 70 °C, the decline trend of corrosion fatigue life slows down. Based on the fitted S-N curve (stress-fatigue life curve), it is calculated that the fatigue limit of 4330 sucker rod at the stress ratio of 0.6 is 196 MPa in the solution of 10,000 mg/L Cl− at room temperature. These could provide valuable theoretical and technical guidance for design and selection of high-strength sucker rod in high-salinity corrosion well fluid environment.

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Strengthening and precipitation hardening mechanisms of surface-mechanically treated 17-4PH stainless steel

Olugbade,

Oladapo,

Zhao

et al. 2024

Int J Adv Manuf Technol

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Achieving ultra-high strength without sacrificing too much ductility is the focus of attention in nanostructured materials. Here, the strengthening mechanism and property enhancement of surface-mechanically treated 17-4PH stainless steel (SS17-4PH) were investigated. Our findings show that a grain refinement and elongated lath-like martensitic grain (~ 50 nm thick) could be produced after surface treatment. The grain size remains in the nanoscale, and random crystallographic orientations with the presence of nanocrystallites characterize the nanocrystalline grains formed on the treated sample. This contributes to the property enhancement with a yield strength of about 901 MPa and a reduced elongation to failure of about 17%. The atom probe tomography (APT) characterization unveiled the emergence of high-density precipitate (Cu-rich) at the material surface, with a number density of about 2.6255 × 1024 m−3 and an average radius of 2.22 nm. Besides, the dislocation activities caused by SMAT result in the gradual breakdown of precipitates into smaller sizes and final dissolution in the matrix, increasing the number of nucleation sites and leading to more grain refinement processes. The grain boundary, dislocation densities, and the Cu-rich precipitate greatly influence the strengthening mechanism of surface-treated SS17-4PH.

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Stress-Corrosion and Corrosion-Fatigue Properties of Surface-Treated Aluminium Alloys for Structural Applications

Cited by 10 publications

References 127 publications

Improving the Formation and Quality of Weld Joints on Aluminium Alloys during TIG Welding Using Flux Backing Tape

Improving the Formation and Quality of Weld Joints on Aluminium Alloys during TIG Welding Using Flux Backing Tape

Low-Frequency Corrosion Fatigue Test Study of Sucker Rods under High-Salinity Well Fluids in Deep CBM Wells

Strengthening and precipitation hardening mechanisms of surface-mechanically treated 17-4PH stainless steel

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