Microstructure evolution and tribological properties for new AlSi9Cu3/5%GrCu composite

Moldovan, Petru; Csáki, Ioana; Popescu, Gabriela; Lucaci, Mariana; Lungu, M.; Butu, Mihai

doi:10.1016/j.compositesb.2015.07.006

Cited by 11 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the wear debris of Al/Gr composites are a mixture of fine and coarse powder. Moldovan et al [83] and Jahanmir et al [84] stated that the plastic strain and dislocation movements in the subsurface result in nucleation of microcracks at the subsurface. The material flow at the reinforcing-matrix interfaces results in stress concentration at the interface and initiates cracks at the subsurface.…”

Section: Wear Debrismentioning

confidence: 99%

Fabrication characteristics and tribological behavior of Al/SiC/Gr hybrid aluminum matrix composites: A review

Singh

2016

Friction

116

View full text Add to dashboard Cite

Improvement in surface properties and retainment of bulk properties are essential requirements for the design of components for wear resistance applications. This paper summarizes various features of Al/SiC/Gr hybrid composites that can be employed in different tribological applications. The study has revealed that the processing route plays a significant role in obtaining a homogeneous structure of these composites. In powder metallurgy, the selection of sizes of the matrix and reinforcement powders is crucial, whereas the wettability between the reinforcement particles and molten alloy is a major challenge in liquid metallurgy. The incorporation of SiC particles increases the mechanical strength and wear performance of Al composites. However, ejection of these particles can reduce the wear performance of Al composites under severe conditions. The addition of Gr particles helps in the formation of a thick and extensive tribolayer on the wear surface. This layer reduces direct contact between the rubbing surfaces, thereby decreasing the wear rate under certain conditions. Morphological analysis of worn surfaces has confirmed that the hybrid composites exhibit superior wear properties than the pure Al alloy and the ceramic-reinforced composite. However, increase in the Gr content beyond a limiting value can deteriorate the tribological properties of these composites. Therefore, true optimization of a tribosystem (of the hybrid composite and counterface) can be achieved by selecting appropriate reinforcement contents.

show abstract

Section: Wear Debrismentioning

confidence: 99%

Fabrication characteristics and tribological behavior of Al/SiC/Gr hybrid aluminum matrix composites: A review

Singh

2016

Friction

116

View full text Add to dashboard Cite

show abstract

“…Fe-rich α-Al 15 (Fe,Mn) 3 Si 2 , β-Al 5 FeSi, and α-Al 15 (Fe,Mn,Cr) 3 Si 2 , Cu-rich ϴ-Al 2 Cu, and Al 5 Mg 8 Cu 2 Si 6 and π-Al 5 Si 6 Mg 8 Fe 2 are intermetallic compounds that may be formed in AlSi 9 Cu 3 alloys. 50–54 In this study, α-Al 15 (Fe,Mn) 3 Si 2 in the shape of the skeleton (Chinese script) and Al 15 (Fe,Mn,Cr) 3 Si 2 with polyhedral shape (sludge) (Figures 8 and 9) were formed in the microstructures of the samples. These Fe-rich compounds formed in AlSi 9 Cu 3 alloy were proved by XRD (Figures 10 and 11) and EDX analysis (Table 2).…”

Section: Resultsmentioning

confidence: 51%

Microstructure and mechanical properties of Al–Si–Cu–Fe alloy-based ceramic particle-reinforced nanocomposites and microcomposites and a modified model to predict the yield strength of nanocomposites

Diler

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

The effects of volume fraction, size, and type of reinforcement particles on the microstructure and mechanical properties of Al–Si–Cu–(Fe) alloy matrix composites were investigated and an analytical model was modified to predict the yield strength of the particle-reinforced nanocomposites. Nano- and micro-particle-reinforced Al–Si–Cu-(Fe) matrix composites (N-AMCs and M-AMCs) were manufactured by adding two different types and sizes of reinforcement particles to Al–Si–Cu–(Fe) alloys at different volume fractions using a two-step stir casting method combined with a high-energy ball milling process and a high-pressure die-casting method. Microstructural analyzes of N-AMCs and M-AMCs were performed using SEM, EDX, and XRD. The Brinell hardness test and the tensile test were carried out to determine the mechanical properties of the N-AMCs and M-AMCs. The hardness of the N-AMCs and M-AMCs was continuously enhanced by increasing the volume fraction of the reinforcement particles, while the yield strength and ultimate tensile strength of the N-AMCs and M-AMCs were improved up to 1.5 vol.% and 4 vol.% of nano-particles and micro-particles, respectively. An analytical model was modified to predict the yield strength of N-AMCs by integrating the effective volume ratio of nano-particles into each strengthening mechanism. The results predicted by the modified model reached nearly 98% agreement with the experimental results up to 1.5 vol.% of the reinforcement particles. Nano-particles had a much greater effect on strengthening mechanisms compared to micro-particles.

show abstract

“…One of the aims of our research refers to the obtaining of alloys with a cellular /porous structure directly from casting, which must have high porosity, adjustable size and distribution of pores and high thermo-mechanical properties, alloys that can be adapted for applications in the field of fluids filtration at temperatures above 100°C, fluids that can be chemically corrosive. The components of composite materials [2][3][4] were chosen to confer high thermo-mechanical and filtration properties to cellular materials [5]:…”

Section: Introductionmentioning

confidence: 99%

Research on Using AlMg10-SiC Cellular Alloys for Fluids Filtering

Rusu

2017

KEM

View full text Add to dashboard Cite

The paper presents some aspects of theoretical-experimental researches on the possibility of obtaining filters from a cellular metallic composite, based on theoretical considerations and practical aspects of the fluid environment, filter elements and the specific equipment that can accommodate this kind of filter. Thus, development of such new and performant filtering technologies, based on multifunctional materials, is currently conditioned by the design and development of cellular structures, with properties adapted to the filtering and functioning demands, structures that can reach operating temperatures between 150 and 2000oC. It was examined the possibility of obtaining alloys with cellular structure directly from casting process, alloys with high porosity, adjustable size and distribution of pores and high thermo-mechanical properties, which can be adapted for applications in the field of fluids filtration at temperatures above 100°C, fluids which can be chemically corrosive. The AlMg10-15% SiC cellular composite was obtained by means of melt bubbling method. We chose this type of material due to its achieved overall morphology: pores are uniform distributed throughout the mass of the material and they are connected through communication channels in the entire volume of the metallic composite. Through the conducted filtration tests we obtain the following values: filter fineness 97 μm, filtering capacity β97 = 8 and filtration efficiency E97 = 87.5 %. In accordance with determined filtering characteristics, the cellular metallic composite AlMg10-15% SiC belongs to the filters materials class that ensure a purity of the filtered fluid corresponding to a purity grade 6, in accordance with NAS 1638 and ISO 4406-1999.

show abstract

Microstructure evolution and tribological properties for new AlSi9Cu3/5%GrCu composite

Cited by 11 publications

References 8 publications

Fabrication characteristics and tribological behavior of Al/SiC/Gr hybrid aluminum matrix composites: A review

Fabrication characteristics and tribological behavior of Al/SiC/Gr hybrid aluminum matrix composites: A review

Microstructure and mechanical properties of Al–Si–Cu–Fe alloy-based ceramic particle-reinforced nanocomposites and microcomposites and a modified model to predict the yield strength of nanocomposites

Research on Using AlMg10-SiC Cellular Alloys for Fluids Filtering

Contact Info

Product

Resources

About