Effect of alumina and silicon carbide hybrid reinforcements on tensile, compressive and microhardness behavior of Mg–3Al–1Zn alloy

Rashad, Muhammad; Pan, Fusheng; Guo, Wei; Lin, Han; Asif, Muhammad; Han, Xiufeng

doi:10.1016/j.matchar.2015.06.033

Cited by 78 publications

(18 citation statements)

References 41 publications

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“…Some Mg alloys containing nano-sized or micro-sized ceramic particles, such as graphene, chromium oxide (Cr2O3), aluminium oxide (Al2O3) and silicon dioxide (SiO2) have shown improved mechanical properties, and decreased corrosion rates [182][183][184][185][186][187]. The use the ceramic particles to enhance the oxidation resistance in Mg alloys was first reported by…”

Section: Nano-sized or Micro-sized Particlesmentioning

confidence: 99%

Oxidation of magnesium alloys at elevated temperatures in air: A review

et al. 2016

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Highlights The oxidation behaviours of Mg alloys from low to high temperatures are reviewed. Characteristics of MgO during oxidation is discussed. Mechanisms of Mg oxidation is presented. Effect of various alloying elements is analysed. AbstractThis paper reviews (i) the oxidation of Mg alloys at elevated temperatures in air; (ii) the influence of alloying elements on the oxidation of Mg alloys; and (iii) the progress in the development of oxidation-resistant Mg alloys. Low oxidation rates have been shown by Mg alloys containing the alloying elements, Ca, Be and rare earth elements. However, these alloying elements may also decrease mechanical properties, such as ductility.

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Section: Nano-sized or Micro-sized Particlesmentioning

confidence: 99%

Oxidation of magnesium alloys at elevated temperatures in air: A review

et al. 2016

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“…Yield strength of AZ91 composite when mixed with nano Al 2 O 3 is found to have elevated due to the grain refinement and Orowan strengthening due to the presence of nanoparticles in the range of 50 nm [41]. The metal matrix of Mg-3Al-1Zn when reinforced with Al 2 O 3 -SiC has increased by 0.2%, which is due to the loss of strain at fracture when the SiC content is increased [38]. The yield strength of Magnesium based matrix composite has increased from 0 to 85 MPa when added with B 4 C particles at 9 wt% in a work done by N Bala [22].…”

Section: Yield Strengthmentioning

confidence: 95%

“…After this, hot extrusion is carried out at 400-degree Celcius [30]. In a work done by M Rashad et al Mg-3Al-1Zn matrix of 70 μm particle size is reinforced with Al 2 O 3, and SiC particles, which was manufactured by the powder metallurgy process was prepared, followed by a hot extrusion process [31]. N Selvakumar et al has proved that Mg matrix when reinforced with 10 wt% of TiC and 7.5 wt% MoS 2 (Molybdenum disulfide) has reduced the wear because of the proper dispersion and interfacial bonding of reinforcement particles [32].…”

Section: Powder Metallurgymentioning

confidence: 99%

“…The tensile strength is found to be more for nano alumina mixed Mg alloy when compared to the matrix prepared by micro alumina particles [30]. The increase in SiC content along with Al 2 O 3 has increased the tensile strength of an Mg-3Al-1Zn alloy by 0.2% [38]. The metal matrix composite has a network structure, and hence it does not show a brittle nature [39].…”

Section: Tensile Strengthmentioning

confidence: 99%

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Development and influence of tribomechanical properties on magnesium based hybrid metal matrix composites-a review

Anand

Subramanian

2020

Mater. Res. Express

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Composite materials are being widely studied for the last few decades, and it has optimized the day to day applications in the engineering field. In this advancement, the use and development of metal matrices was a significant outcome that concentrated on the addition of many particulate materials in a metal matrix at nano and micro levels. Among these Magnesium, metal matrices are having a high potential, especially in transport, defense, and aircraft industries. Many research works are being carried out to use the capabilities of Magnesium and has provided excellent results. This paper is an overview of the development, processing, and improvement of properties in Magnesium alloys. Various manufacturing processes such as self-propagating high-temperature method, stir casting, laser cladding, and powder metallurgy has been used to develop the magnesium composites for increasing the properties by using various wt% of reinforcements added in the matrix. The improvement in mechanical properties such as tensile strength, yield strength, hardness and tribological properties such as wear rate is reviewed. The different properties and capabilities of Magnesium alloys such as AZ31, AZ91, and ZE41 is also discussed from the various research works.

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Section: Nano-sized or Micro-sized Particlesmentioning

confidence: 99%

Influence of trace addition of Be on the oxidation behaviour of Mg alloys

Tan¹

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As the lightest structural metallic materials, magnesium (Mg) alloys have attracted increasing interest in the automotive and aerospace industries. However, low oxidation resistance of Mg alloys limits their wider applications at elevated temperatures. Beryllium (Be) has long been considered as one of the most effective alloying elements in improving the oxidation resistance of Mg alloys even at ppm concentration. However, a convincing mechanism of this unique effect of Be in Mg alloys still remains unclear. Two mechanisms have been proposed. The BeO hypothesis assumes that the BeO layer forms prior to the MgO, whereas the reactive element effect model considers that the segregation of Be 2+ cations along the MgO grain boundaries inhibits the outward diffusion of Mg 2+ cations. Both models have never been experimentally verified. The present work aims to comprehensively investigate the effects of trace additions of Be on the high temperature oxidation behaviour of Mg alloys and, therefore, to understand the mechanism of how Be improves the oxidation resistance of Mg alloys.Be-containing AZ91 alloys were produced with trace additions of Be (10 ppm-60 ppm) into the alloy melt. Thermogravimetric analysis (TGA) and long-term furnace oxidation (LTFO) were used to characterize the oxidation behaviours of the alloys. All results showed that trace additions of Be significantly improved the oxidation resistance of the AZ91 alloy at 400 C, even at 10 ppm. In order to investigate the effectiveness of Be in other Mg alloys, 60 ppm Be was added to Mg-2Zn, Mg-2Sn, Mg-2Y, AS21, AM60, ZK20 and ZC63. Similar to the AZ91 alloy, experimental results showed that microalloying with Be effectively lowered the oxidation rates at 500 C and increased the ignition temperatures of the Mg-2Zn, Mg-2Sn, AS21, and ZC63 alloys. But, Be addition marginally influenced the oxidation behaviours of the ZK20, AM60 and Mg-2Y alloys.In order to understand the mechanisms behind why Be improves the oxidation resistance of cast Mg alloys, the oxidation layers were characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nanoindentation. No continuous BeO surface layers were observed on the surfaces of the alloys tested and no Be segregation was detected along the grain boundaries of MgO. However, TEM examination detected the accumulation of Be in the initially formed MgO layer during the oxidation process, which led to the formation of fine-grained (Mg,Be)O solid solutions. As a result, the initially formed surface oxide was effectively strengthened. The nanoindentation and nanoscratch analyses verified that the reinforced (Mg,Be)O layers on the Becontaining AZ91, Mg-2Zn, Mg-2Sn, AS21 and ZC63Be alloys exhibited a higher hardness and strength than the MgO layer on the alloys without Be. Hence, it is considered that during high temperature oxidation, the accumulation of Be on the surface of Mg alloys reinforced the initially XI My special thanks also go to Prof. Fusheng Pan for his insightful advices on my projec...

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Effect of alumina and silicon carbide hybrid reinforcements on tensile, compressive and microhardness behavior of Mg–3Al–1Zn alloy

Cited by 78 publications

References 41 publications

Oxidation of magnesium alloys at elevated temperatures in air: A review

Oxidation of magnesium alloys at elevated temperatures in air: A review

Development and influence of tribomechanical properties on magnesium based hybrid metal matrix composites-a review

Influence of trace addition of Be on the oxidation behaviour of Mg alloys

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