Corrosion resistance of repair welded naval aluminium alloys

Katsas, S.; Nikolaou, J.; Papadimitriou, G.

doi:10.1016/j.matdes.2005.11.005

Cited by 27 publications

(9 citation statements)

References 5 publications

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“…Özellikle alaşımın 400 °C üzerindeki sıcaklıklardan yavaş olarak soğuması, diğer bir deyişle uzun süre ısıya maruz kalması, β fazının tane sınırlarına çökelmesini tetiklemektedir. β fazı, kendisini çevreleyen α fazına göre elektrokimyasal olarak daha anodiktir ve deniz suyu gibi korozif ortamlarda seçici korozyona uğramaktadır [14,21,22,23,24]. Özellikle ısı girdisinin yüksek ve kaynak dikişinin geniş olduğu 55-C numunesinde, Mg içeriği AA5754 ana malzemesine göre daha yüksek olan kaynak telinde, katılaşma esnasında anodik karakteristiğe sahip β fazının daha fazla çökelmiş olduğu düşünülmektedir.…”

Section: Materyal Ve Metodunclassified

Soğuk Metal Transferi ile Birleştirilen AA5754 Alaşımı İnce Sacların Korozyon Davranışı

Durmuş¹,

Çömez²

2018

Journal of Polytechnic

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Section: Materyal Ve Metodunclassified

Soğuk Metal Transferi ile Birleştirilen AA5754 Alaşımı İnce Sacların Korozyon Davranışı

Durmuş¹,

Çömez²

2018

Journal of Polytechnic

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“…AghaAli [21] found that the HAZ of repair specimen is more sensitive to pitting corrosion and the corrosion sensitivity of HAZ was increased with repair number increases. As far as the corrosion resistance is concerned, repair welding can be safely employed as a means of extending the service life of the junction [22]. Raja et al [23] compared the SCC behavior of as-welded and repair-welded joint while using the slow strain rate technique (SSRT).…”

Section: Introductionmentioning

confidence: 99%

A Study on Microstructure, Residual Stresses and Stress Corrosion Cracking of Repair Welding on 304 Stainless Steel: Part I-Effects of Heat Input

Luo

Peng

et al. 2020

Materials

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In this paper, the effect of repair welding heat input on microstructure, residual stresses, and stress corrosion cracking (SCC) sensitivity were investigated by simulation and experiment. The results show that heat input influences the microstructure, residual stresses, and SCC behavior. With the increase of heat input, both the δ-ferrite in weld and the average grain width decrease slightly, while the austenite grain size in the heat affected zone (HAZ) is slightly increased. The predicted repair welding residual stresses by simulation have good agreement with that by X-ray diffraction (XRD). The transverse residual stresses in the weld and HAZ are gradually decreased as the increases of heat input. The higher heat input can enhance the tensile strength and elongation of repaired joint. When the heat input was increased by 33%, the SCC sensitivity index was decreased by more than 60%. The macroscopic cracks are easily generated in HAZ for the smaller heat input, leading to the smaller tensile strength and elongation. The larger heat input is recommended in the repair welding in 304 stainless steel.

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“…Najčešći problemi koji se sreću pri zavarivanju Al-Mg legura su: degradacija mehaničkih osobina u ZUT [5], smanjenje 6 ZAVARIVANJE I ZAVARENE KONSTRUKCIJE, 1/2016, str. 05-12 corrosion resistance [6][7][8], the appearance of pores -as a result of the absorption of hydrogen in the air, cracking -primarily as a result of the warm phase transformations that occur in the weld metal and heat affected zone and the occurrence of inclusions -usually oxide Al 2 O 3 [9]. High thermal conductivity of aluminum influences on the width of the HAZ, and thus the degradation of the mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

“…However, they differ from each other. Helium is one of the lightest gas, compared with the korozione postojanosti [6][7][8], pojava pora -kao posledica apsorpcije vodonika iz vazduha, pojava prslina -prvenstveno toplih kao posledica faznih transformacija koje se javljaju u metalu šava i zoni uticaja toplote i pojava uključaka -najčešće oksida Al 2 O 3 [9]. Visoka toplotna provodljivost aluminijuma utiče na širinu ZUT, a samim tim na degradaciju mehaničkih karakteristika.…”

Section: Introductionunclassified

Influence of gas shielding atmosphere on weldability of AIMg4.5Mn alloy

Cvetković-Prokić¹,

Popović²,

Kastelec-Macura³

et al. 2016

Zavarivanje i zavarene konstrukcije

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Kljucne reči: aluminijum, legura AlMg4.5Mn, metal šava, zavarljivost, zaštitna atmosfera, poroznost Key words: aluminium, AlMg4.5Mn alloy, weld metal, weldability, gas shielding atmosphere, porosity AbstractIn this paper is shown the influence of gas shielding atmosphere on the weldability of AlMg4.5Mn alloy. Prepared plates were welded using tungsten inert gas (TIG) with four different shielding atmospheres. Metallographic testing, tensile testing and hardness testing of welded joints were carried out. It has been shown that composition of shielding atmosphere has effect on the weld appearance, depth of penetration, overflowing of filler material, porosity in the weld metal, as well as on values of tensile strength and hardness. Weldments obtained by welding in a shielding atmosphere Ar + 50% He + 0.015% N 2 have the best appearance of the weld metal, good overflowing of filler material and satisfactory width to hight ratio. It was also established that these welds have the lowest weld metal porosity. IzvodU ovom radu je prikazano kako vrsta zaštitne atmosfere utiče na zavarljivost legure aluminijuma AlMg4.5Mn. Pripremljene ploče su zavarene TIG postupkom u četiri različite zaštitne atmosfere. Posle izvedenog zavarivanja, urađena su metalografska ispitivanja, ispitivanje zatezne čvrstoće zavarenog spoja u celini, kao ispitivanje tvrdoće zavarenog spoja. Pokazano je kako vrsta zaštitne atmosfere utiče na oblik šava, dubinu uvarivanja, razlivanje dodatnog materijala, pojavu poroznosti u metalu šava, kao i na vrednosti zatezne čvrstoće i tvrdoće. Šavovi dobijeni zavarivanjem u zaštitnoj atmosferi Ar+50%He+0,015%N 2 pokazali su najbolji izgled metala šava, pri čemu je dobro razlivanje dodatnog materijala a odnos širine i visine šava zadovoljavajući. Takođe je pokazano da ovako dobijeni šavovi imaju najmanju poroznost metala šava.

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Corrosion resistance of repair welded naval aluminium alloys

Cited by 27 publications

References 5 publications

Soğuk Metal Transferi ile Birleştirilen AA5754 Alaşımı İnce Sacların Korozyon Davranışı

Soğuk Metal Transferi ile Birleştirilen AA5754 Alaşımı İnce Sacların Korozyon Davranışı

A Study on Microstructure, Residual Stresses and Stress Corrosion Cracking of Repair Welding on 304 Stainless Steel: Part I-Effects of Heat Input

Influence of gas shielding atmosphere on weldability of AIMg4.5Mn alloy

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