“…% of alumina. These are among the highest values reported in the literature (Ref 80 - 83 ) due to the fabrication strategy in this research that employs both matrix strengthening and dispersion strengthening mechanisms (Ref 33 ). In addition, the measured stiffness of our coatings varied from 28 GPa to 62 GPa for the Al-34 wt.…”
Section: Discussionmentioning
confidence: 74%
“…This process was conducted using a cylinder with a 20 mm diameter whose angular velocity and operating time were set to 20 RPM and 30 minutes, respectively. As shown by Shao et al (Ref 33 ), when deposited into coatings, the mixed powder blend with 60 wt.% Al 2 O 3 produced coatings that were Al-34 wt.% Al 2 O 3 and the mixed powder blend with 90 wt.% Al 2 O 3 produced coatings that were Al-46 wt.% Al 2 O 3 . Fig.…”
Section: Methodsmentioning
confidence: 82%
“…Our model culminated in an acceptable consistency between the numerical and experimental findings, both quantitatively (i.e., based on yield strain, yield strength, and stiffness) and qualitatively (i.e., based on initiation and propagation of damage mechanisms as well as the trends of stress versus strain histories), which lays the foundation to fill the gap in our computational knowledge of ceramic–metal composite coatings. The extended 3D models of Al-Al 2 O 3 MMC coatings were generated by Digimat software, where microstructural characteristics obtained by SEM micrographs and EDS analysis (Ref 33 ) were incorporated into the model, including the distribution of size, shape, and weight fraction (i.e., ~ 34wt. % and ~ 46wt.…”
Section: Discussionmentioning
confidence: 99%
“…1 (a), which was connected to a volumetric powder feeder (5MPE, Oerlikon Metco, Westbury, NY, USA). Based on previous studies (Ref 2 , 33 , 34 ), the air temperature and pressure were set to 375 °C and 620 kPa, respectively. The nozzle was manipulated by a robot (Motoman HP-20, Yaskawa Electric Corp., Waukegan, IL, USA).…”
Section: Methodsmentioning
confidence: 99%
“…To visualize the features of the macroscopic deformation of the specimen surface, the machine was equipped with an AOS PROMON U750 high-speed camera with a full resolution of 1280 × 1024 and a VIC 900170WOF LED laser light guide for illumination. This assembly was coupled with digital image correlation (DIC) capabilities using VIC-2D (v6 2018) software (Ref 35 ) (Correlated Solutions Irmo, SC, USA) to monitor the strain fields, which is detailed in Shao et al (Ref 33 ). The specimen was aligned between the loading platens made from M2-graded high-speed steel with a diameter of 1 inch (see Fig.…”
This study developed microstructure-based finite element (FE) models to investigate the behavior of cold-sprayed aluminum–alumina (Al-Al
2
O
3
) metal matrix composite (MMC) coatings subject to indentation and quasi-static compression loading. Based on microstructural features (i.e., particle weight fraction, particle size, and porosity) of the MMC coatings, 3D representative volume elements (RVEs) were generated by using Digimat software and then imported into ABAQUS/Explicit. State-of-the-art physics-based modeling approaches were incorporated into the model to account for particle cracking, interface debonding, and ductile failure of the matrix. This allowed for analysis and informing on the deformation and failure responses. The model was validated with experimental results for cold-sprayed Al-34 wt.% Al
2
O
3
and Al-46 wt.% Al
2
O
3
metal matrix composite coatings under quasi-static compression by comparing the stress versus strain histories and observed failure mechanisms (e.g., matrix ductile failure). The results showed that the computational framework is able to capture the response of this cold-sprayed material system under compression and indentation, both qualitatively and quantitatively. The outcomes of this work have implications for extending the model to materials design and for applications involving different types of loading in real-world application (e.g., erosion and fatigue).
“…% of alumina. These are among the highest values reported in the literature (Ref 80 - 83 ) due to the fabrication strategy in this research that employs both matrix strengthening and dispersion strengthening mechanisms (Ref 33 ). In addition, the measured stiffness of our coatings varied from 28 GPa to 62 GPa for the Al-34 wt.…”
Section: Discussionmentioning
confidence: 74%
“…This process was conducted using a cylinder with a 20 mm diameter whose angular velocity and operating time were set to 20 RPM and 30 minutes, respectively. As shown by Shao et al (Ref 33 ), when deposited into coatings, the mixed powder blend with 60 wt.% Al 2 O 3 produced coatings that were Al-34 wt.% Al 2 O 3 and the mixed powder blend with 90 wt.% Al 2 O 3 produced coatings that were Al-46 wt.% Al 2 O 3 . Fig.…”
Section: Methodsmentioning
confidence: 82%
“…Our model culminated in an acceptable consistency between the numerical and experimental findings, both quantitatively (i.e., based on yield strain, yield strength, and stiffness) and qualitatively (i.e., based on initiation and propagation of damage mechanisms as well as the trends of stress versus strain histories), which lays the foundation to fill the gap in our computational knowledge of ceramic–metal composite coatings. The extended 3D models of Al-Al 2 O 3 MMC coatings were generated by Digimat software, where microstructural characteristics obtained by SEM micrographs and EDS analysis (Ref 33 ) were incorporated into the model, including the distribution of size, shape, and weight fraction (i.e., ~ 34wt. % and ~ 46wt.…”
Section: Discussionmentioning
confidence: 99%
“…1 (a), which was connected to a volumetric powder feeder (5MPE, Oerlikon Metco, Westbury, NY, USA). Based on previous studies (Ref 2 , 33 , 34 ), the air temperature and pressure were set to 375 °C and 620 kPa, respectively. The nozzle was manipulated by a robot (Motoman HP-20, Yaskawa Electric Corp., Waukegan, IL, USA).…”
Section: Methodsmentioning
confidence: 99%
“…To visualize the features of the macroscopic deformation of the specimen surface, the machine was equipped with an AOS PROMON U750 high-speed camera with a full resolution of 1280 × 1024 and a VIC 900170WOF LED laser light guide for illumination. This assembly was coupled with digital image correlation (DIC) capabilities using VIC-2D (v6 2018) software (Ref 35 ) (Correlated Solutions Irmo, SC, USA) to monitor the strain fields, which is detailed in Shao et al (Ref 33 ). The specimen was aligned between the loading platens made from M2-graded high-speed steel with a diameter of 1 inch (see Fig.…”
This study developed microstructure-based finite element (FE) models to investigate the behavior of cold-sprayed aluminum–alumina (Al-Al
2
O
3
) metal matrix composite (MMC) coatings subject to indentation and quasi-static compression loading. Based on microstructural features (i.e., particle weight fraction, particle size, and porosity) of the MMC coatings, 3D representative volume elements (RVEs) were generated by using Digimat software and then imported into ABAQUS/Explicit. State-of-the-art physics-based modeling approaches were incorporated into the model to account for particle cracking, interface debonding, and ductile failure of the matrix. This allowed for analysis and informing on the deformation and failure responses. The model was validated with experimental results for cold-sprayed Al-34 wt.% Al
2
O
3
and Al-46 wt.% Al
2
O
3
metal matrix composite coatings under quasi-static compression by comparing the stress versus strain histories and observed failure mechanisms (e.g., matrix ductile failure). The results showed that the computational framework is able to capture the response of this cold-sprayed material system under compression and indentation, both qualitatively and quantitatively. The outcomes of this work have implications for extending the model to materials design and for applications involving different types of loading in real-world application (e.g., erosion and fatigue).
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