Strengthening in a WE54 magnesium alloy containing SiC particles

Száraz, Zoltán; Trojanová, Zuzanka; Cabbibo, M.; Evangelìsta, E.

doi:10.1016/j.msea.2006.01.182

Cited by 104 publications

(36 citation statements)

References 15 publications

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“…Actually, T s determines the limit of applicability of a material at high temperatures Highest microhardness is the consequence of the role of nano-particles and fine grained structure which also maintain high thermal stability of Cu-2.5Al composite. It may be assumed that nano-sized Al 2 O 3 particles some of which are distributed at the grain boundaries and dislocations will slow down the grain growth in Cu-2.5Al composite [14]. Recrystallization is moved to temperatures even above 800 o C. The lower microhardness (nearly two times) compared to Cu-2.5Al is the direct consequence of increase of grain size in Cu-5Al 2 O 3 composite suggesting that the role of micro-sized commercial Al 2 O 3 particles in obstructing grain growth is less efficient.…”

Section: Thermal Stabilitymentioning

confidence: 99%

Copper alloys with improved properties: standard ingot metallurgy vs. powder metallurgy

Jovanović¹,

Rajković²,

Cvijović‐Alagić³

2014

Metall Mater Eng

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Three copper-based alloys: two composites reinforced with Al 2 O 3 particles and processed through powder metallurgy (P/M) route, i.e. by internal oxidation (Cu-2.5Al composite) and by mechanical alloying (Cu-4.7Al ) and Cu-0.4Cr-0.08Zr alloy produced by ingot metallurgy (vacuum melting and casting) were the object of this investigation. Light microscope and scanning electron microscope (SEM) equipped with electron X-ray spectrometer (EDS) were used for microstructural characterization. Microhardness and electrical conductivity were also measured. Compared to composite materials, Cu-0.4Cr-0.08Zr alloy possesses highest electrical conductivity in the range from 20 to 800 o C, whereas the lowest conductivity shows composite Cu-2.5Al processed by internal oxidation. In spite to somewhat lower electrical conductivity (probably due to inadequate density), Cu-2.5Al composite exhibits thermal stability enabling its application at much higher temperatures than materials processed by mechanical alloying or by vacuum melting and casting.

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Section: Thermal Stabilitymentioning

confidence: 99%

Copper alloys with improved properties: standard ingot metallurgy vs. powder metallurgy

Jovanović¹,

Rajković²,

Cvijović‐Alagić³

2014

Metall Mater Eng

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“…However, the compressive stress detected at any given strain was lower for AZ91/ZK60A/ 1.5 vol% AlN compared to monolithic AZ91/ZK60A as shown in Figure 4(b). The tensile strength increase in AZ91/ ZK60A/1.5 vol% AlN compared to monolithic AZ91/ ZK60A can be attributed to the following well-known factors (pertaining to reinforcement): (a) dislocation generation due to elastic modulus mismatch and coefficient of thermal expansion mismatch between the matrix and reinforcement [28][29][30][31], (b) Orowan strengthening mechanism [30][31][32], and (c) load transfer from matrix to reinforcement [28,30]. The lower compressive strength of AZ91/ZK60A/1.5 vol% AlN compared to monolithic AZ91/ZK60A can be attributed possibly to compressive shear buckling of brittle Mg-Zn nanorods in AZ91/ZK60A/1.5 vol% AlN as illustrated in Figure 5.…”

Section: Tensile and Compressivementioning

confidence: 99%

The Overall Effects of AlN Nanoparticle Addition to Hybrid Magnesium Alloy AZ91/ZK60A

Paramsothy

Chan²,

Kwok³

et al. 2012

Journal of Nanotechnology

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A hybrid magnesium alloy nanocomposite containing AlN nanoparticle reinforcement was fabricated using solidification processing followed by hot extrusion. The nanocomposite exhibited similar grain size to the monolithic hybrid alloy, reasonable AlN and intermetallic nanoparticle distribution, nondominant (0 0 0 2) texture in the longitudinal direction, and 17% higher hardness than the monolithic hybrid alloy. Compared to the monolithic hybrid alloy, the nanocomposite exhibited higher tensile yield strength (0.2% TYS) and ultimate tensile strength (UTS) without significant compromise in failure strain and energy absorbed until fracture (EA) (+5%, +5%, −14% and −10%, resp.). Compared to the monolithic hybrid alloy, the nanocomposite exhibited unchanged compressive yield strength (0.2% CYS) and higher ultimate compressive strength (UCS), failure strain, and EA (+1%, +6%, +24%, and +6%, resp.). The overall effects of AlN nanoparticle addition on the tensile and compressive properties of the hybrid magnesium alloy is investigated in this paper.

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“…In this case of reduction in size of Mg-Al second phase, redistribution of smaller second phase (compare between predominantly aggregated type and dispersed type) assists in improving ductility [18]. Any hypothetical strength increase in the nanocomposite (effect 1) can be attributed to the following well known factors (pertaining to reinforcement): (a) dislocation generation due to elastic modulus mismatch and coefficient of thermal expansion mismatch between the matrix and reinforcement [19][20][21][22], (b) Orowan strengthening mechanism [21][22][23], and (c) load transfer from matrix to reinforcement [19,21]. However, any hypothetical strength decrease in the nanocomposite (effect 2) can be attributed to reduction in size of Mg-Al second phase (since there is no statistical change in grain size between AZ81 and AZ81/Si 3 N 4 ).…”

Section: Tensile/compressivementioning

confidence: 99%

Si₃N₄ Nanoparticle Addition to Concentrated Magnesium Alloy AZ81: Enhanced Tensile Ductility and Compressive Strength

Paramsothy

XingHe²,

Chan³

et al. 2012

ISRN Nanomaterials

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This study is aimed at understanding the tensile ductility and compressive strength-enhancing dual function of nanoparticles in a concentrated magnesium alloy (AZ81) nanocomposite. Si 3 N 4 nanoparticles were selected for reinforcement purposes due to the known affinity between magnesium and nitrogen. AZ81 magnesium alloy was reinforced with Si 3 N 4 nanoparticles using solidification processing followed by hot extrusion. The nanocomposite exhibited similar grain size and hardness to the monolithic alloy, reasonable nanoparticle distribution, and nondominant (0 0 0 2) texture in the longitudinal direction. Compared to the monolithic alloy in tension, the nanocomposite exhibited higher failure strain (+23%) without significant compromise in strength, and higher energy absorbed until fracture (EA) (+27%). Compared to the monolithic alloy in compression, the nanocomposite exhibited similar failure strain (+3%) with significant increase in strength (up to +20%) and higher EA (+24%). The beneficial effects of Si 3 N 4 nanoparticle addition on tensile ductility and compressive strength dual enhancement of AZ81 alloy are discussed in this paper.

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Strengthening in a WE54 magnesium alloy containing SiC particles

Cited by 104 publications

References 15 publications

Copper alloys with improved properties: standard ingot metallurgy vs. powder metallurgy

Copper alloys with improved properties: standard ingot metallurgy vs. powder metallurgy

The Overall Effects of AlN Nanoparticle Addition to Hybrid Magnesium Alloy AZ91/ZK60A

Si₃N₄ Nanoparticle Addition to Concentrated Magnesium Alloy AZ81: Enhanced Tensile Ductility and Compressive Strength

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Strengthening in a WE54 magnesium alloy containing SiC particles

Cited by 104 publications

References 15 publications

Copper alloys with improved properties: standard ingot metallurgy vs. powder metallurgy

Copper alloys with improved properties: standard ingot metallurgy vs. powder metallurgy

The Overall Effects of AlN Nanoparticle Addition to Hybrid Magnesium Alloy AZ91/ZK60A

Si3N4 Nanoparticle Addition to Concentrated Magnesium Alloy AZ81: Enhanced Tensile Ductility and Compressive Strength

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Product

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Si₃N₄ Nanoparticle Addition to Concentrated Magnesium Alloy AZ81: Enhanced Tensile Ductility and Compressive Strength