STRESS CORROSION CRACKING OF WELDED JOINTS OF Al-Mg ALLOYS

Czechowski, M.

doi:10.5604/12314005.1133154

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…It is considered that Al-Mg alloys resistant to IGC have a NAMLT value ≤15 mg cm -2 , and those susceptible, greater than 25 mg cm -2 [22]. NAMLT test is the most common method for evaluating the susceptibility of Al-Mg alloys to IGC, and it is used to evaluate the susceptibility to IGC welded material and compare to base material [23][24][25]. The welding process involves the local heating which affects to microstructure, physical and mechanical properties and stress around the weld.…”

Section: Introductionmentioning

confidence: 99%

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Effect of sensitization on corrosion properties of TIG welded Al-Mg alloy

Radović¹,

Marinković²

2020

Sci Tech Rev

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The effect of sensitization on the intergranular corrosion (IGC) of TIG welded AlMg6Mn was investigated by means of scanning electron microscopy (SEM) and corrosion NAMLT tests. The as-received hot rolled AlMg6Mn alloy plates with a thickness of 8 mm were welded by TIG welding with S-AlMg5 as a filler material. Specimens were sensitized at 100°C for 7 days. It was found that welded specimens are sensitive to IGC. The. mass loss in NAML test was 106.7 mg/cm². The welding increases the susceptibility to IGC, since the mass loss of the base metal at the same test was 70.7 mg/cm². The increase of susceptibility to IGC is attributed to significant continually precipitated Mg-rich phase along the grain boundaries during the sensitization treatment.

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Section: Introductionmentioning

confidence: 99%

“…Many authors investigated the effects of welding on the corrosion of Al-Mg alloys containing up to 5 % Mg, mostly about alloy containing Mn (EN AW-5083) 14, 17, 28-30, but lack of results regarding alloy with higher content of Mg [19,24,[28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Effect of sensitization on corrosion properties of TIG welded Al-Mg alloy

Radović¹,

Marinković²

2020

Sci Tech Rev

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“…Also, the influence of yield stress, tensile strength and constraint on the stress and plastic strain distribution in the soft-affected zone is determined. Czechowski (2007) compared the stress corrodibility of the 5083 aluminum alloy with the new 5059 (Alustar) alloy, MIG-and FSW-welded. Stress corrosion cracking was examined via the slow-strain-rate-testing.…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of stresses in weld metal subjected to tensile load

S¹,

Rammohan²,

Shetty³

et al. 2016

WJE

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Purpose Stainless steel is one of the most important elements in structural design and application, and due to its excellent properties, it is widely used in industries for conventional structural engineering applications, such as thermal power plants, nuclear power plants, civil constructions, etc. (Mishra et al., 2014). A traditional tensile testing machine cannot determine the transversal stress–strain curves (Olden, 2002, 2013). Design/methodology/approach In the present study, identical mild steel specimen parts are welded at different intervals and then subjected to tensile loading. Welding is carried along the length of the specimen. Induced stresses are determined at the welded intervals and the stress–strain curve is obtained. Findings By considering the temperature of the weld at the interface, thermal stresses are determined. Brinell hardness number is determined at the interface and the base metal. Also, the change in the hardness at the heat-affected zone (HAZ) is found. Validation is carried out by comparing the results with the original stress–strain curve. Originality/value In the HAZ, there is a drop in the hardness number, which means that there is a change in the material property due to welding. The thermal stresses which develop at the interface can also play a very important role for property change. Results show that the stress developed due to the rise in temperature is lesser than that of normal stresses.

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Study of the corrosion resistance of aluminum alloy AMg6 and steel 12Kh18N10T in conditions of loading under the impact of environmental factors

Abramova

Goncharov

Nikitin

2021

Zavod. lab., Diagn. mater.

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Stress corrosion cracking is one of the most dangerous types of corrosion damage in metallic materials. We present the results of studying the impact of environmental factors on the susceptibility of AMg6 aluminum alloy and 12Kh18N10T stainless steel to stress corrosion cracking under four-point bending. Tests of loaded samples were carried out in laboratory and field conditions of the moderately warm climate of the coastal zone over a period of six months. The samples were examined daily with fixation of the time to their destruction and upon completion of the tests the appearance of the samples and the depth of intergranular corrosion on microsections were assessed. A 3D relief was constructed using macro photography of the surface with the determination of the depth of corrosion foci. We also carried out a comparative analysis of the frequency of stress-induced destruction of steel samples of various grades both in atmospheric and laboratory conditions. It is shown that in atmospheric conditions characterized by the presence of dust particles acting as concentrators for the formation of corrosion foci, the aggressiveness of the corrosive effect of the environment increases, whereas the general corrosion resistance of materials decreases. The most pronounced effect of the environment was recorded in AMg6 alloy samples when exposed under a ventilated canopy in conditions of periodic spraying of seawater aerosols. The depth of surface corrosion damage was up to 0.1 mm. When the test samples were exposed under other conditions (salt fog chamber and louvered storage) the corrosion damage was absent. The results obtained can be used to predict the corrosion resistance of the products made of AMG6 alloy and 12Kh18N10T steel when operated in conditions of loading under the impact of environmental factors.

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STRESS CORROSION CRACKING OF WELDED JOINTS OF Al-Mg ALLOYS

Cited by 3 publications

References 3 publications

Effect of sensitization on corrosion properties of TIG welded Al-Mg alloy

Effect of sensitization on corrosion properties of TIG welded Al-Mg alloy

Experimental analysis of stresses in weld metal subjected to tensile load

Study of the corrosion resistance of aluminum alloy AMg6 and steel 12Kh18N10T in conditions of loading under the impact of environmental factors

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