High cycle fatigue behavior of the severely plastically deformed 6082 aluminum alloy with an anodic and plasma electrolytic oxide coating

Residual stress relaxation and duty cycle on high cycle fatigue life of micro-arc oxidation coated AA7075-T6 alloy

“…Besides, the path of the crack propagation would insignificantly deflect because the coating was not prone to local yield. This can be seen from the SEM images of the crack propagation in previous studies [13,59]. According to above analysis, the fatigue behavior of the coated samples with cracks on its surface became inferior seriously.…”

Fatigue Resistance of an Anodized and Hardanodized 6082 Aluminum Alloy Depending on the Coating Thickness in the High Cycle Regime

“…The experimental determined fatigue data points were curve‐fit using a logarithmic model provided by Rateick et al [ 9 ] This empirical model allows for a high compliance of the experimentally determined data points with the calculated progression of the fatigue life as it was developed by Rateick et al [ 9 ] for a hardanodized aluminum alloy and was successfully used in previous own studies representing the fatigue curve of coated specimens. [ 22,26,28 ] …”

“…The pronounced influence of the coating structure and in particular anodizing process‐induced cracks was also detected in previous own studies when comparing different coating types. [ 23,28 ] In addition to the thermal residual stress‐induced radial cracks, other defects like microvoids or micropores effect the fatigue strength of the hardanodic coatings. For thinner coatings, the defects, of which size is mostly determined by the size of the precipitates in the aluminum substrate, are larger in relation to the overall coating thickness and therefore these defects and irregularities have a more pronounced influence.…”

“…For the subsequent electrochemical treatment, the used electrolytes, bath temperatures, and current densities are listed in Table 3. These parameters were chosen according to previous own studies [7,26,28] showing their suitability to form functional coatings to enable a comparability. Anodizing and hardanodizing was performed in aqueous sulfuric acid due to the industrial relevance of this electrolyte.…”

Synthesizing high aspect ratio Aluminum Oxide nanowires from highly-ordered anodic self-assembled templates

“…Although, synthesizing the Aluminum Oxide nanostructures in large volume for industrial applications, due to their expensive and time consuming production methods such as: chemical vapor deposition (CVD) techniques or electrophoretic based methods [22][23][24][25][26][27][28][29][30][31][32], limited their application for opteoelectronic devices or water purification technologies. On the other hand, novel fabrication techniques such as electrochemical anodization methods have shown more accurate controllability over materials morphology and chemical composition of nanostructures in comparison to conventional production techniques as well as their easier scalability for industrial applications [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52]. As a result, the electrochemical anodization techniques have a potential to pave the way for the industrial scale production of nanostructures with a highly controlled morphology as well as their chemical composition and crystalline structure [53].…”