Compressive Behavior and Microstructural Characteristics of Iron Hollow Sphere Filled Aluminum Matrix Syntactic Foams
Abstract
:1. Introduction
2. Results and Discussion
2.1. Microstructure
2.2. Compressive Behavior and Properties
3. Experimental Section
3.1. Production of the AMSF Blocks and Samples
Matrix | Chemical Element (wt %) | Young Modulus, E0 (GPa) | Density, ρ (g·cm−3) | |||||
---|---|---|---|---|---|---|---|---|
Al | Mg | Si | Cu | Fe | Other | |||
Al99.5 | 99.5 | – | 0.1 | – | 0.1 | 0.3 | 69.0 | 2.71 |
AlSi12 | 86.0 | 0.1 | 12.8 | – | 0.1 | 1.0 | 78.6 | 2.65 |
AlMgSi1 | 97.0 | 1.1 | 1.1 | – | 0.5 | 0.3 | 70.0 | 2.70 |
AlCu5 | 95.0 | – | – | 4.5 | – | 0.5 | 73.1 | 2.81 |
Fe sphere wall | – | – | – | – | 99.9 | 0.1 | 212.0 | 7.80 |
3.2. Sample Preparation and Microstructural Analysis
Abrasive | Time (min) | Load (N) | Revolution (min−1) | Direction |
---|---|---|---|---|
P 320 SiC | 1 | 22 | 220 | counter |
P 600 SiC | 1 | 22 | 220 | counter |
P 1200 SiC | 1 | 22 | 220 | counter |
P 2400 SiC | 1 | 22 | 220 | counter |
6 μm diamond | 15 | 27 | 150 | counter |
3 μm diamond | 6 | 27 | 150 | counter |
0.05 μm SiO | 3 | 27 | 125 | comply |
3.3. Mechanical Tests
4. Conclusions
- Low-pressure inert gas infiltration is a proper method to produce AMSFs with high volume fraction of hollow sphere inclusions.
- Depending on the matrix material, a thin interface layer may be formed between the hollow spheres and the matrix. This layer ensures good bonding and load transfer, resulting in favorable mechanical properties. EBSD investigations showed that the average grain size in the vicinity of the hollow spheres was lower than in the matrix, far from the hollow spheres. The grains had no distinguished directions and were equiaxed.
- The standardized mechanical tests revealed beneficial specific mechanical properties. The matrix material had significant effect on the mechanical properties, as well as the T6 heat treatment (solution treated and artificially aged). The yield strength (at 1% deformation), the plateau strength (between 10% and 40% deformation) and the energy absorption capabilities up to the initialization of fracture (1% deformation) and up to the end of the test (50% deformation) were increased by ~30% in the case of T6 treatment. The structural stiffness was also varied with the matrix material, but remained almost unchanged in the case of T6 treatment.
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Szlancsik, A.; Katona, B.; Májlinger, K.; Orbulov, I.N. Compressive Behavior and Microstructural Characteristics of Iron Hollow Sphere Filled Aluminum Matrix Syntactic Foams. Materials 2015, 8, 7926-7937. https://doi.org/10.3390/ma8115432
Szlancsik A, Katona B, Májlinger K, Orbulov IN. Compressive Behavior and Microstructural Characteristics of Iron Hollow Sphere Filled Aluminum Matrix Syntactic Foams. Materials. 2015; 8(11):7926-7937. https://doi.org/10.3390/ma8115432
Chicago/Turabian StyleSzlancsik, Attila, Bálint Katona, Kornél Májlinger, and Imre Norbert Orbulov. 2015. "Compressive Behavior and Microstructural Characteristics of Iron Hollow Sphere Filled Aluminum Matrix Syntactic Foams" Materials 8, no. 11: 7926-7937. https://doi.org/10.3390/ma8115432