The effect of processing parameters on the tensile

McMinn, A.; Page, R. A.; Wei, W.

doi:10.1007/bf02646161

Cited by 4 publications

(6 citation statements)

References 3 publications

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“…By applying costeffective manufacturing techniques such as squeeze casting, considerable expansion of these Mg composites is expected in the consumer goods, automotive, machinery, and aerospace industries. [1,2,3] Solidification of molten metal under higher pressures during squeeze casting offers high productivity and excellent near-net-shape formability, together with microstructural advantages such as a fine matrix microstructure and good fiber/matrix wettability.…”

Section: Introductionmentioning

confidence: 99%

Mechanical property and fracture behavior of squeeze-cast Mg matrix composites

Sohn

Euh

Lee

et al. 1998

Metall Mater Trans A

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The present study aims to investigate the microstructure and fracture properties of AZ91 Mg matrix composites fabricated by the squeeze-casting technique, with variations in the reinforcement material and applied pressure. Microstructural and fractographic observations, along with in situ fracture tests, were conducted on three different Mg matrix composites to identify the microfracture process. Two of them are reinforced with two different short fibers and the other is a whisker-reinforced composite. From the in situ fracture observation of Kaowool-reinforced composites, the effect of the applied pressure on mechanical properties is explained using a competing mechanism: the detrimental effects of fiber breakage act to impair the beneficial effects of the grain refinement and improved densification as the applied pressure increases. On the other hand, for the composites reinforced with Saffil short fibers, microcracks were initiated mainly at the fiber/matrix interfaces at considerably higher stress intensity factor levels, while the degradation of fibers was not observed even in the case of the highest applied pressure. This finding indicates that the higher applied pressure yields better mechanical properties, attributable to the Saffil short fibers having relatively high resistance to cracking. Although an improved microstructure was obtained by accommodating the appropriate applied pressure in the short fiber-reinforced composites, their mechanical properties were far below those of conventional Al matrix composites. In this regard, the Alborex aluminum borate whisker is suggested as a replacement for the short fibers used in the present investigation, to achieve better mechanical properties and fracture toughness.

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Section: Introductionmentioning

confidence: 99%

Mechanical property and fracture behavior of squeeze-cast Mg matrix composites

Sohn

Euh

Lee

et al. 1998

Metall Mater Trans A

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“…Hack et al 6 -8 have found a reaction zone containing MgO particles at fibre/matrix interfaces in cpMg and ZE41A alloy reinforced with˛-Al 2 O 3 fibres. The presence of the reaction zone composed of MgO in ZE41 has been reported also by McMinn et al 9 They have found that the mean MgO particle size increased with increasing casting temperature.…”

Section: Magnesium-based Composites Containing Alumina Fibresmentioning

confidence: 74%

Interfaces in magnesium‐based composites

Mordike

Lukáč

2001

Surface & Interface Analysis

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“…Young's modulus and shear modulus for the present materials and some magnesium-based materials 20,[23][24][25] are summarized in Table 1. The AZ91/C 60 -0% had similar elastic properties with cast AZ91.…”

Section: Elastic Propertiesmentioning

confidence: 99%

“…Though the small amount of SiC particles did not increase the Young's modulus in the AZ91/SiC composite, 23) a remarkable increase has generally been attained in magnesium alloys reinforced with a large amount of ceramic particles or fiber (V f ! 20%), 24,25) as listed in Table 1. The origin of the slight decrease in elastic moduli for the present composites is assumed to be resulting from low elastic moduli of the fullerene phase in the present composites.…”

Section: Elastic Propertiesmentioning

confidence: 99%

“…Yield strength, ultimate tensile strength, elongation-tofailure for the present materials (indicated by the arrows), AZ91 alloys processed by various processing routes and magnesium-based composites reported in the literature 20,[23][24][25][32][33][34][35][36][37][38][39][40] are summarized in Fig. 8 in the relationship between strength and elongation-to-failure.…”

Section: Tensile Propertiesmentioning

confidence: 99%

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Mechanical and Damping Properties of Fullerene-Dispersed AZ91 Magnesium Alloy Composites Processed by a Powder Metallurgy Route

et al. 2006

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The microstructures and mechanical properties of fullerene powder dispersed AZ91 magnesium alloy composites were examined. The AZ91 with 0, 1 and 5 mass% fullerene additions were produced by extruding a mixture of AZ91 machined chips and fullerene powder. The matrix grains of the extruded materials were equiaxed, and the size was $ 5 mm irrespective of the fullerene content. The agglomerated fullerene powder was aligned parallel to the extrusion direction in the composites. The addition of 1 mass% fullerene had little effect on the elastic moduli, tensile strength and ductility, whereas the addition of 5 mass% fullerene slightly decreased them. A comparison between the tensile properties of the present composites and those of AZ91 alloys processed by various methods was also made. The damping capacity increased steeply by the fullerene addition. The effectiveness of the fullerene addition for the enhancement of the damping capacity of metallic alloys was verified. A good combination of damping capacity, elastic moduli, strength and ductility was attained in the present composites.

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The effect of processing parameters on the tensile

Cited by 4 publications

References 3 publications

Mechanical property and fracture behavior of squeeze-cast Mg matrix composites

Mechanical property and fracture behavior of squeeze-cast Mg matrix composites

Interfaces in magnesium‐based composites

Mechanical and Damping Properties of Fullerene-Dispersed AZ91 Magnesium Alloy Composites Processed by a Powder Metallurgy Route

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