Journal ArticleDOI
Intergranular Corrosion and Stress Corrosion Cracking of Sensitised AA5182
Alison J. Davenport,Yudie Yuan,Rajan Ambat,Brian J. Connolly,Martin Strangwood,Andreas Afseth,Geoff Scamans +6 more
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In this article, the IGC and SCC susceptibility of AA5182 (Al-4.5 wt% Mg) was found to depend strongly on sensitisation heat treatments.Abstract:
AA5182 (Al-4.5 wt% Mg) can become susceptible to intergranular corrosion (IGC) with time at moderately elevated service temperatures owing to precipitation of Mg-rich β-phase at grain boundaries, which can lead to stress corrosion cracking (SCC). The IGC and SCC susceptibility of AA5182 was found to depend strongly on sensitisation heat treatments. AFM and TEM studies demonstrated that the degree of precipitation and thus susceptibility to attack for a boundary can be related to its crystallographic misorientation. Low angle boundaries (read more
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Journal ArticleDOI
Effect of sensitization heat treatment on properties of Al–Mg alloy AA5083-H116
TL;DR: In this article, the properties of AA5083-H116 were investigated using microhardness measurements, tensile testing, optical microscopy, Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDS), and Nitric Acid Mass Loss Test (NAMLT).
Book ChapterDOI
Durability and Corrosion of Aluminium and Its Alloys: Overview, Property Space, Techniques and Developments
Nazatul Liana Sukiman,Xiaorong Zhou,Nick Birbilis,Anthony E. Hughes,Johannes M. C. Mol,Santiago J. Garcia,George Thompson +6 more
TL;DR: Aluminium (Al) is an important structural engineering material, its usage ranking only behind ferrous alloys (Birbilis, Muster et al. 2011) as discussed by the authors.
Journal ArticleDOI
Spreading of intergranular corrosion on the surface of sensitized Al-4.4Mg alloys: A general finding
TL;DR: In this paper, the authors investigated the spreading of IGC to other precipitates, resulting in formation of large clusters of corroded grain boundaries such that IGC spreading is observed only for highly sensitized AA5083 at potentials above a critical spreading potential.
Journal ArticleDOI
A Survey of Sensitization in 5xxx Series Aluminum Alloys
TL;DR: In this article, the relevant works that have documented the degree of sensitization for various 5xxx series alloys, providing a holistic overview of the issue, along with attention to the bulk composition, heat treatment, and microstructure.
Journal ArticleDOI
The effect of grain size and grain boundary misorientation on the corrosion resistance of commercially pure aluminium
TL;DR: In this paper, the effect of microstructure on electrochemical response of commercially pure aluminium was investigated, and the results revealed insignificant differences for samples with different grain size, shape and fraction of HAGBs.
References
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Journal ArticleDOI
Stress corrosion cracking of sensitized AA5083 (Al-4.5Mg-1.0Mn)
TL;DR: In this article, constant extension rate tests were conducted under open-circuit conditions and under potential control in 3.5 pct NaCl on samples isothermally treated at 150 °C.
Journal ArticleDOI
Role of Mg in the stress corrosion cracking of an Al-Mg alloy
TL;DR: In this article, the progress of Mg enrichment at grain boundaries was measured for increasing thermal-treatment times, using auger electron spectroscopy (AES) of grain boundaries exposed by fracture within the spectrometer and by analytical electron microscopy of thin foils.
Book ChapterDOI
Stress-Corrosion Cracking of High-Strength Aluminum Alloys
TL;DR: In this paper, the chemical compositions for commonly used high-strength aluminum-base alloys are listed and a typical application for each of these alloys is listed in Table 2 and the heat treatments for the various tempers of each of them are given in Table 3.
Journal ArticleDOI
Grain boundary character distribution and intergranular corrosion behavior in high purity aluminum
Journal ArticleDOI
The nucleation and initial stages of growth of grain boundary precipitates in Al-Zn-Mg and Al-Mg alloys
TL;DR: In this paper, the early stages of grain boundary precipitation in two aluminium alloys, Al-6 %Zu-3 %Mg and Al-7 % Mg, have been examined by transmission electron microscopy, and are discussed in relation to the heat treatment procedure and the properties of individual boundaries.