The Influence of Stored Energy on Grain Boundary Chemistry and Intergranular Corrosion Development in AA2024-T3 Alloy

Zhang, Xinxin; Zhou, Xiaorong; Cai, Guangyi; Yu, Yang; Lü, Xueqin; Jiao, Yanbin; Dong, Zehua

doi:10.3390/ma11112299

Cited by 7 publications

(2 citation statements)

References 41 publications

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“…Therefore, the chance of corrosion in these zones is higher to reduce the energy level. 52 In addition, different crystallographic orientations lead to electrochemical potential differences and many micro galvanic cells form the pits inside the grains. The inhomogeneous distribution of strained and unstrained regions which is left behind by the metallurgical processes (such as fabrication, annealing, and shaping) gives rise to an inhomogeneous distribution of many micro-sized galvanic cells, which, in a corrosive environment, initiate and extend the localized corrosion.…”

Section: Resultsmentioning

confidence: 99%

Analysis of Mechanisms Affecting the Tool in Pulsed Electrochemical Machining

Ghasemiansafaei,

Schaefer,

Hall

et al. 2023

J. Electrochem. Soc.

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Electrochemical machining (ECM) is an important technology in machining difficult-to-cut materials. The contactless nature of ECM and anodic dissolution of the workpiece propound no tool ablation. Nevertheless, in a few studies, tool damages, namely the formation of pits and geometrical changes, have been observed, which is the investigative goal of this work. This study considers three hypotheses to investigate tool changes during pulsed electrochemical machining (PECM) which are hydrogen embrittlement, cavitation erosion, and cathodic corrosion. A systematic study of monitoring possible tool (1.4112 martensitic stainless steel) changes during ECM and PECM in aqueous NaNO3 electrolyte is performed. Experimental results of this study show that hydrogen embrittlement and cavitation erosion are not the reason for causing changes in the tool. Cathodic corrosion might be the reason for the changes in the tool in this study; however, more investigation is needed. The approach in this study is investigating the microstructure of the tool regarding different aspects before and after ECM and PECM, as the microstructure stores information regarding phenomena occurring during any process.

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Section: Resultsmentioning

confidence: 99%

Analysis of Mechanisms Affecting the Tool in Pulsed Electrochemical Machining

Ghasemiansafaei,

Schaefer,

Hall

et al. 2023

J. Electrochem. Soc.

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“…However, it has been proposed that corrosion susceptibility of steels increases with increasing deformation due to the formation of less compact and thin oxide films and a negative offset in pitting potential [28,29]. In addition, various studies have also shown that the pitting and IGC susceptibility of aluminum alloys increases with the introduction of pre-deformation treatment due to the distribution of residual strain across grains [30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Enhancing the intergranular corrosion resistance and mechanical properties of Al–Mg–xSi–Cu–Zn alloys by synergistic intergranular and intragranular precipitation behaviors

Zhu

Guo

et al. 2022

J Mater Sci

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The intergranular corrosion (IGC) resistance of age-hardening Al-Mg-Si-Cu alloys is closely related to the precipitation behavior adjacent to grain boundaries. In this study, we proposed to regulate the interaction of solute atoms and solute partitioning of Zn-containing Al-Mg-xSi-Cu alloys by introducing dislocations, which can synergistically decorate the intergranular and intragranular precipitation behavior. Consequently, the continuity of grain boundary precipitates and width of solute-depleted precipitate-free zones are inhibited accompanied with high number density or coarse precipitate in the matrix. As a result, the IGC resistance is greatly improved without strength and ductility loss, and the related mechanism has been proposed.

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