The structure and properties of PM composite materials based on EN AW-2124 aluminum alloy reinforced with the BN or Al2O3 ceramic particles

Dobrzański, L. A.; Włodarczyk, Anna; Adamiak, M.

doi:10.1016/j.jmatprotec.2005.04.031

Cited by 68 publications

(33 citation statements)

References 5 publications

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“…As a result, less-deformed components align with the extrusion direction to form bands. For example, Dobrzanski et al observed banded structures in Al matrix composites consolidated from powder mixtures containing an Al-based powder (EN AW-2124) and ceramic reinforcements (Al 2 O 3 and BN) by extrusion [24]. They concluded that extrusion could align reinforcement particles along the extrusion direction, thus resulting in bands filled with reinforcement particles.…”

Section: Extruded Materialsmentioning

confidence: 99%

Microstructural and mechanical characterisation of 7075 aluminium alloy consolidated from a premixed powder by cold compaction and hot extrusion

2014

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Abstract:The present work concerns the processing of 7075 Al alloy by cold compaction and hot extrusion of a pre-mixed powder. To this end, a premixed Al-Zn-Mg-Cu powder, Alumix 431D, was uniaxially cold pressed at 600 MPa into cylindrical compacts 25 mm in diameter and 15 mm thick. Subsequently, selected green compacts were subjected to either a delubrication or presintering heat treatment. Extrusion of the pow-der compacts was performed at 425 °C using an extrusion ratio of 25:1.No porosity was present in the microstructures of the extruded alloys. Heat treatment prior to extrusion had a great effect on the degree of alloy development in powder compacts and, as a direct consequence, remarkably affected the extru-sion process and the as-extruded microstructures and mechanical properties of the processed materials. Hot extrusion caused banded structures for the alloys consolidated from the green and delubricated pow-der compacts. The alloy extruded from the presintered powder compact showed a fine, recrystallized microstructure which resulted in a superior combination of mechanical properties for the consolidated material.

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Section: Extruded Materialsmentioning

confidence: 99%

Microstructural and mechanical characterisation of 7075 aluminium alloy consolidated from a premixed powder by cold compaction and hot extrusion

2014

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“…Mainly, the single (reference) particle particle cluster (area 5x reference ) particle [1,8,9,10,11]. Also, in these composites it is hard to compare the strength of composites with pure matrix due to the influence of particles on the precipitation processes.…”

Section: Tensile Strength -Young's Modulus Of Elasticitymentioning

confidence: 99%

Aluminium-based Composite Materials in Construction of Transport Means

Miloš¹,

Jurić²,

Škorput³

2012

PROMET

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“…Up to now, aluminum-silicon (Al-Si) alloys have been extensively used because of their excellent castability, low coefficient of thermal expansion, good corrosion resistance, and high strength-to-weight ratio [6][7][8]. Al-based metal matrix composites finds application in many industries, including automotive, military, aerospace, and electronics [9,10]. The limitation of aluminum is still with regard to its low mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Effects of Zr Additive on Microstructure, Mechanical Properties, and Fractography of Al-Si Alloy

Qian

Zhu

et al. 2018

Metals

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Abstract:The effects of Zr additive on the microstructure, mechanical properties, and fracture behavior of Al-Si alloy were systematically investigated. The additive of Zr obviously reduced the size of Si particles and changed its morphology. Grain size refinement was promoted by the reaction between Al and Zr forming Al 3 Zr and ZrSi 2 compounds. Compared to a Zr-free alloy, the additive enhanced the tensile strength, compressive strength, shear strength, and hardness. The optimized Zr content was 2.4 wt % corresponding to a tensile strength of 231.1 MPa, compressive strength of 343.1 MPa, shear strength of 174.9 MPa, and hardness of 85.5 HV, greater than those of the Zr-free alloy. This illustrates that fine-grain strengthening and the existence of a second phase can improve the mechanical properties of Al-Si alloy. The fracture surface of Al-Si alloy without Zr additive showed a brittle fracture mode and there were no pits on the fractured surface. In the presence of Zr addictive, a typical plastic deformation with a large amount of pits was evidenced.

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The structure and properties of PM composite materials based on EN AW-2124 aluminum alloy reinforced with the BN or Al2O3 ceramic particles

Cited by 68 publications

References 5 publications

Microstructural and mechanical characterisation of 7075 aluminium alloy consolidated from a premixed powder by cold compaction and hot extrusion

Microstructural and mechanical characterisation of 7075 aluminium alloy consolidated from a premixed powder by cold compaction and hot extrusion

Aluminium-based Composite Materials in Construction of Transport Means

Effects of Zr Additive on Microstructure, Mechanical Properties, and Fractography of Al-Si Alloy

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