Effect of Strain Localization on Pitting Corrosion of an AlMgSi0.5 Alloy

Nickel, Dominik; Dietrich, D.; Mehner, Thomas; Frint, Philipp; Spieler, Dagobert; Lampke, Thomas

doi:10.3390/met5010172

Cited by 26 publications

(16 citation statements)

References 32 publications

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“…Therefore, those microstructural components that changed during the SPD processing caused an enhanced resistance to the dissolution of the material. A similar observation for this alloy was also reported in Nickel et al [ 40 ] It was shown that after ECAP processing, this phenomenon is enhanced due to local microstrains, although the resulting pits are shallower and more homogenous. The reduced size of the pits in the material after ECAP was attributed to cell size.…”

Section: Discussionsupporting

confidence: 89%

Effect of microstructural features on the corrosion behavior of severely deformed Al–Mg–Si alloy

Orłowska

Ura‐Bińczyk

Olejnik

et al. 2020

Materials & Corrosion

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The aim of this study was to determine the influence of severe plastic deformation processing and the changes in microstructure resulting therefrom on the corrosion resistance of an Al–Mg–Si alloy. The alloy was processed using incremental equal channel angular pressing, which caused a reduction in grain size from 15 to 0.9 µm. The grain refinement was accompanied by an increase in the number of grain boundaries and dislocations, and by changes in grain orientation. However, there was no change in the size and number of intermetallic particles, which presumably resulted in a constant number of galvanic couplings. Electrochemical experiments revealed only slight differences between the samples before and after processing. Higher potential transients/oscillations upon immersion and increased corrosion currents in the vicinity of corrosion potential point to slightly higher reactivity of the most refined material. This indicates that intermetallic particles are the most crucial microstructural elements in terms of corrosion resistance. Their impact exceeds that of grain boundaries, in particular, at the stage of corrosion initiation. The development of corrosion attack is controlled more by the microstructure of the matrix as the grain refinement resulted in a less pronounced corrosion attack in comparison with the coarse‐grained sample.

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Section: Discussionsupporting

confidence: 89%

Effect of microstructural features on the corrosion behavior of severely deformed Al–Mg–Si alloy

Orłowska

Ura‐Bińczyk

Olejnik

et al. 2020

Materials & Corrosion

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“…With increasing of holding time, the depth of corrosion pits becomes bigger and bigger so that the fatigue crack initiation life of aluminum alloy becomes shorter [9]. Most researchers have previously reported fatigue data of aluminum alloys under pre-corrosion mode based on the equivalent life concept according to airplane structure subjected to two main factors of environment corrosion and fatigue loading [9,[23][24][25]. These results indicated that the differences between the cyclic stress corrosion and prior-corrosion HCF damage behaviors of aluminum alloys are always existent.…”

Section: Fatigue Life Characteristicsmentioning

confidence: 99%

The Effects of Corrosive Media on Fatigue Performance of Structural Aluminum Alloys

Yang

Wang

et al. 2016

Metals

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Abstract:The effects of corrosive media on rotating bending fatigue lives (the cyclic numbers from 10 4 to 10 8 ) of different aluminum alloys were investigated, which involved the corrosion fatigue lives of five kinds of aluminum alloys in air, at 3.5 wt. % and 5.0 wt. % NaCl aqueous solutions. Experimental results indicate that corrosive media have different harmful influences on fatigue lives of different aluminum alloys, in which the differences of corrosion fatigue lives depend strongly on the plastic property (such as the elongation parameter) of aluminum alloys and whether to exist with and without fracture mode II. The other various influence factors (such as the dropping corrosive liquid rate, the loading style, and the nondimensionalization of strength) of corrosion fatigue lives in three media were also discussed in detail by using the typical cases. Furthermore, fracture morphologies and characteristics of samples, which showed the different fatigue cracking behaviors of aluminum alloys in three media, were investigated by scanning electron microscopy (SEM) in this paper.

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“…Grains smaller than 40 nm have been obtained. o Nickel et al [14] studied the effect of strain localization on pitting corrosion of an AlMgSi0.5 alloy.…”

Section: Open Accessmentioning

confidence: 99%