Microstructural stability and precipitate evolution of thermally treated 7075 aluminum alloy fabricated by cold spray
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F24%3APU152063" target="_blank" >RIV/00216305:26210/24:PU152063 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S1044580324006405" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1044580324006405</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.matchar.2024.114259" target="_blank" >10.1016/j.matchar.2024.114259</a>
Alternative languages
Result language
angličtina
Original language name
Microstructural stability and precipitate evolution of thermally treated 7075 aluminum alloy fabricated by cold spray
Original language description
In this work, the effects of post-deposition heat treatment on microstructural stability of cold sprayed AA7075 aluminum coatings were thoroughly characterized. The as-atomized powder and annealed coatings were investigated using scanning electron microscopy, electron back-scattered diffraction, and microhardness measurements. Scanning transmission electron microscopy was further employed to evaluate grain/subgrain structure near the particle interface region. Precipitation in the coating was studied through differential scanning calorimetry and X-ray diffraction. The feedstock powder revealed dendritic/cellular-like structure accompanied by microsegregations of the main alloying elements at dendrite boundaries. The high-pressure Cold Spray process led to formation of lamellar subgrains and UFG grains via dynamic recovery/recrystallization mechanisms. GP zones present in the AA7075 powder continuously reprecipitated into more stable η´/η phases owing to propellant gas heating and extensive plastic strains induced during cold spraying. The applied annealing resulted in progressive softening of the AA7075 coatings and gradual transformation of LAGBs into HAGBs. The solute-rich grain boundary network observed in powder microstructure was fully retained after CS deposition but decomposed into coarse η and S precipitates upon high-temperature annealing. The CS AA7075 coating showed decent thermal stability up to 300 °C and rapid grain growth at 400 °C. The relationship between precipitate size and thermal stability was further discussed in terms of the Zener pinning theory.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
<a href="/en/project/TN02000010" target="_blank" >TN02000010: National Competence Centre of Mechatronics and Smart Technologies for Mechanical Engineering</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
MATERIALS CHARACTERIZATION
ISSN
1044-5803
e-ISSN
1873-4189
Volume of the periodical
216
Issue of the periodical within the volume
114259
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
114259-114259
UT code for WoS article
001297004400001
EID of the result in the Scopus database
2-s2.0-85201195253