A Through-Process Experimental Approach to Enable Optimization of Cold Sprayed Al 7075 Consolidation Performance

Abstract

This work employs an example of a through process experiment systematic approach to study the relationship among powder properties, cold spray (CS) processing parameters, and consolidated specimen behavior through a combined effort of characterization methods and computational models. This process will allow for the systematic isolation of variables that can affect powder and CS deposit properties. In this study, Al 7075 powder was used as feedstock to produce a CS coating using industry-standard processing parameters. Techniques such as SEM, EDS, XRD, nanoindentation, and tensile testing were used to characterize the properties of both the feedstock powder and CS deposits. In addition, computational thermodynamic modeling was used to guide the interpretation of microstructural features of the powder and CS specimen. Finally, an additive yield strength model was employed to quantify the strengthening components introduced through the CS process.

The Influence of Shot Peening and Artificially Ageing Aluminium Alloy 7075 on Corrosion Behaviour

“…Crystallisation of the T-phase starts at 447 °C, and the S-phase at 463 °C. We can find the similar description of the phases calculated by Thermo-Calc in the research [33,34]. In aluminium alloy 7075, precipitation proceeds as follows: Super Saturated Solid Solution (SSSS)  GP-zones (GPZs)  metastable η' phase  stable η phase (MgZn2).…”

Solid-State Additive Deposition of AA7075 on AZ31B Substrate: Heat Treatment to Improve the Corrosion Fatigue Resistance

“…Mg is one of the lightest metallic materials, the potential candidate for light-weighting. The resistance to wear and corrosion of Mg alloys should be improved to extend the application of Mg alloys for structural applications, and surface modification is one of them [1][2][3][4][5][6]. The typical surface modification processes [7][8][9][10] of the Mg alloys are conversion coating, laser processing, physical vapor deposition, micro-arc oxidation, and solid-state additive deposition, namely cold spray (CS) deposition, etc.…”

“…The typical surface modification processes [7][8][9][10] of the Mg alloys are conversion coating, laser processing, physical vapor deposition, micro-arc oxidation, and solid-state additive deposition, namely cold spray (CS) deposition, etc. Among them, the CS process is the most effective and better for coating all materials [5,6]. In this process, the formed protective coatings improve the wear and corrosion resistance of different materials, including metals and ceramics.…”