Effect of Particle Cracking on the Strength and Ductility of Al-SiCp Powder Metallurgy Metal Matrix Composites

Mazen, A. A.; Emara, Mohamed M.

doi:10.1361/10599490417579

Cited by 13 publications

(9 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to the analytical expressions of these contributions in the related references, these contributions to YSc increase when the particle size decreases. When a high-yield-strength matrix is used, the yield strength of the composite increases [ 32 ]. With an improper high-strength matrix is used, the stress on the particle may exceed the particle strength, which would lead to particle cracking.…”

Section: Discussionmentioning

confidence: 99%

“…The existence of the particle increases the strain-hardening effect [ 34 , 35 ]. Conversely, the particle will also continually crack during deformation of the composite [ 10 , 32 , 36 ], which reduces the contributions to the composite strength and the effective loading area of the specimen. The higher the matrix strength or the larger the particle size, the more particle cracking occurs [ 32 , 33 , 36 ].…”

Section: Discussionmentioning

confidence: 99%

“…Conversely, the particle will also continually crack during deformation of the composite [ 10 , 32 , 36 ], which reduces the contributions to the composite strength and the effective loading area of the specimen. The higher the matrix strength or the larger the particle size, the more particle cracking occurs [ 32 , 33 , 36 ]. The particle-cracking-induced damage reduces the flow stability of the composite, which usually causes early fracture [ 11 , 37 ].…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Strengthening and Weakening Effects of Particles on Strength and Ductility of SiC Particle Reinforced Al-Cu-Mg Alloys Matrix Composites

et al. 2021

View full text Add to dashboard Cite

The strengthening and weakening effects of SiC particles on composite strength and ductility were studied. Al-Cu-Mg alloys matrices with three different mechanical properties were used. Their yield strength, ultimate strength, and elongation range from 90 to 379 MPa, 131 to 561 MPa, and 18% to 31%, respectively. SiC particles with sizes of 4, 8, 12, 15, 20, and 30 μm were used to reinforce these three matrices, separately, and the composites of eighteen combinations of the particle sizes and matrix strengths were manufactured. Yield strength, ultimate strength, elongation, and fracture morphology of these composites were characterized. Based on the analysis, the strengthening to weakening behavior on strength and ductility were comprehensively discussed. The critical particle size having the best ductility was obtained. The strengthening limit and match range of the particle and the matrix to achieve effective strengthening were defined as a function of the particle size and matrix strength. This work offers an important reference for optimization of mechanical properties of the particle-reinforced metal matrix composites.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Strengthening and Weakening Effects of Particles on Strength and Ductility of SiC Particle Reinforced Al-Cu-Mg Alloys Matrix Composites

et al. 2021

View full text Add to dashboard Cite

show abstract

“…These include residual porosity which is a characteristic of PM materials, presence of clusters of particles which could: (i) incorporate voids within the cluster, (ii) hinder good bonding between the matrix and the reinforcement particles, and (iii) could promote stress triaxiality in the nearby area of the composite [14,15]. Another factor that could negatively affect the strength of the composite is reinforcement particle cracking during processing or during deformation [16]. Fig.7a, shows a micrograph of Al-5 wt% SiC p showing cracked reinforcement particles and residual porosity close to them.…”

Section: -2 Effect Of Reinforcement Weight Fractionmentioning

confidence: 99%

HIGH TEMPERATURE DEFORMATION BEHAVIOR OF Al-SiCp METAL MATRIX COMPOSITES

Mazen

Emara²

2007

International Conference on Aerospace Sciences and Aviation Tec

View full text Add to dashboard Cite

Aluminum-silicon carbide (Al-SiC p) metal matrix composite (MMC) materials were fabricated using the powder metallurgy (PM) techniques of hot compaction followed by hot extrusion. Different reinforcement weight fractions were used, i.e. 0, 2.5, 5, and 10 wt% SiC p. Hot tensile deformation tests were used to characterize the ductility deformation and strength at different temperatures, i.e. T = 0.3 T m , 0.4 T m , 0.5 T m , and 0.6 T m (where T m is the absolute melting point of the matrix material), and at different strain rates, i.e. ε • = 2 x10-3 s-1 , and 0.6 T m 100x 10-3 s-1. Brief microscopic examination was used to support the analysis of results. It was found that the stress-strain behavior is dominated by work-hardening at the lower temperature range. The work-hardening exponent (n) decreased as T increased and as reinforcement weight fraction increased but increased as ε • increased. As reinforcement weight fraction increased, considerable strengthening was achieved compared to the unreinforced matrix. The reinforcement particles dominated the plastic flow and reduced the effect of high temperature in reducing the flow stress. However, as reinforcement weight fraction increased, the tensile strength σ u , as well as the yieled strength, σ y were negatively affected specially at high deformation temperatures and at high strain rates. σ u was found to be more negatively affected than σ y. σ y and σ u of the unreinforced material increased as ε • increased, for all tested temperatures. As reinforcement particles were introduced to the matrix, the two parameters increased with strain rate up to ε • = 50 x 10-3 s-1 , then decreased as ε • = 100 x 10-3 S-1. Maximum reduction in σ y was obtained at T = 0.4 T m at ε • = 100 x 10-3 s-1. Ductility expressed by the strain to facture, ε f , decreased with the increase in ε • , for all investigated materials. Minimum ε f was obtained for Al-10 wt% SiC p as T = 0.4 t m and ε • = 100 x 10-3 s-1 was applied.

show abstract

“…The automotive and aerospace industries have been interested in metal matrix composites (MMCs) and metal matrix nanocomposites (MMNCs) due to the growing demand for lightweight, high-performance materials (Mazen and Emara, 2004). MMCs and MMNCs have been considered as replacements for conventional metals and alloys because they have higher stability at elevated temperatures, good strength-to-mass ratios and superior wear resistance, along with high stiffness and strength (Zhou et al, 1999).…”

mentioning

confidence: 99%

Deformation behaviour of aluminium low-micron MMCs and MMNCs at warm working temperatures (0.3-0.5 Tm)

Gxowa

Chown

Govender³

et al. 2016

J. South. Afr. Inst. Min. Metall.

View full text Add to dashboard Cite

Effect of Particle Cracking on the Strength and Ductility of Al-SiCp Powder Metallurgy Metal Matrix Composites

Cited by 13 publications

References 16 publications

Strengthening and Weakening Effects of Particles on Strength and Ductility of SiC Particle Reinforced Al-Cu-Mg Alloys Matrix Composites

Strengthening and Weakening Effects of Particles on Strength and Ductility of SiC Particle Reinforced Al-Cu-Mg Alloys Matrix Composites

HIGH TEMPERATURE DEFORMATION BEHAVIOR OF Al-SiCp METAL MATRIX COMPOSITES

Deformation behaviour of aluminium low-micron MMCs and MMNCs at warm working temperatures (0.3-0.5 Tm)

Contact Info

Product

Resources

About