Effect of intermetallic compound on the Al-Mg composite materials fabricated by mechanical ball milling and spark plasma sintering

Park, Kwang-jae; Park, Jehong; Kwon, Hansang

doi:10.1016/j.jallcom.2017.12.054

Cited by 36 publications

(12 citation statements)

References 24 publications

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“…According to the reasons mentioned above, the strengthening of the Al-Ti composites could have occurred due to the grain refinement caused by the formation of ICs in the matrices of the Al-Ti composites. In our previous research, we successfully manufactured Al-SUS316L composites [19] and Al-Mg composites [37] using SPS. The microstructures of these composites presented unusual phases which consisted of ICs.…”

Section: Resultsmentioning

confidence: 99%

Behavior of Intermetallic Compounds of Al-Ti Composite Manufactured by Spark Plasma Sintering

Park

Kim

et al. 2019

Materials

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In this research, we successfully fabricate high-hardness and lightweight Al-Ti composites. Al-Ti composites powders with three compositions (Al-20, 50, and 80 vol.% Ti) are mixed using ball milling and subsequently subjected to spark plasma sintering (SPS). The microstructures and phases of the Al-Ti composites are characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD) spectroscopy, and field emission-electron probe microanalysis (FE-EPMA). These tests confirm the presence of several intermetallic compounds (ICs) (Al3Ti, Al5Ti2, Al11Ti5) in the composites, and we are able to confirm that these ICs are produced by the reaction of Al and Ti during the SPS process. Furthermore, thermogravimetric-differential thermal analysis (TG-DTA) is used to analyze the formation behavior of the ICs. In addition, the mechanical properties of the composites are measured using their Vickers hardness and it is observed that the Al-80 vol.% Ti composite exhibits the highest hardness. Consequently, it is assumed that SPS is suitable for fabricating Al-Ti composites which represent the next-generation materials to be used in various industrial fields as high-hardness and lightweight materials.

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Section: Resultsmentioning

confidence: 99%

Behavior of Intermetallic Compounds of Al-Ti Composite Manufactured by Spark Plasma Sintering

Park

Kim

et al. 2019

Materials

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“…Low-density aluminum has a relatively lower hardness than other metals. Therefore, metals such as: Fe, Mg, Mo or Ti were used to improve the mechanical properties of aluminum [6][7][8][9]. Moreover, various methods have been used to obtain a good quality coating of various metals on the Al surface.…”

Section: Introductionmentioning

confidence: 99%

Influence of Heat Treatment on the Corrosion Resistance of Aluminum-Copper Coating

Scendo

Spadło

Staszewska-Samson

et al. 2020

Metals

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Influence of heat treatment on the corrosion resistance of the aluminum-copper (Al-Cu) coating on the aluminum substrate was investigated. The coating was produced by the electrical discharge alloying (EDA) method. The surface and microstructure of the specimens were observed by a scanning electron microscope (SEM). The phase analysis of the composite materials by X-ray diffraction (XRD) and energy-dispersive spectroscopy (EDS) indicated that intermetallic compounds (i.e., CuAl2 and Cu9Al4) were formed through reactions between Al and Cu. during the EDA process. A significant increase in the hardness of the Al-Cu coating was affected by the improvement of the alloy structure. The heat treatment of materials was carried out at 400 °C or 600 °C in the air atmosphere. A corrosion test of materials was carried out by using electrochemical methods. The corrosive environment was acidic chloride solution. After heat treatment at 400 °C the mechanical properties of the Al/Cu alloy increased significantly and the oxide layer protect of the alloy surface against corrosion. However, after heat treatment at elevated temperature, i.e., 600 °C it was found that the (Al2O3)ads and (CuO)ads coatings were destroyed. The mechanical properties of the Al/Cu alloy decreased, and its surface has undergone deep electrochemical corrosion.

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“…The addition of aluminium leading to the precipitation of β-Mg17Al12 phases that usually occurs at the grain boundaries [23][24][25]. Park et al [26] mentioned variation of precipitates form from the addition of Mg to Al sample, including Al3Mg2, Mg17Al12, and the oxides particles affected the Vickers hardness. Miao et al [25] suggested that the alloying addition to Mg-Al material significantly changed the morphology of Mg17Al12 phases and, consequently, enhanced the ageing response and strength.…”

Section: Introductionmentioning

confidence: 99%

Role of Aluminium on the Microstructure and Corrosion Behaviour of Magnesium Prepared by Powder Metallurgy Method

Alias¹

2020

IJAME

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Much research on magnesium (Mg) emphasises creating good corrosion resistance of magnesium, due to its high reactivity in most environments. In this study, powder metallurgy (PM) technique is used to produce Mg samples with a variation of aluminium (Al) composition. The effect of aluminium composition on the microstructure development, including the phase analysis was characterised by optical microscope (OM), scanning electron microscopy (SEM) and x-ray diffraction (XRD). The mechanical property of Mg sample was performed through Vickers microhardness. The results showed that the addition of aluminium in the synthesised Mg sample formed distribution of Al-rich phases of Mg17Al12, with 50 wt.% of aluminium content in the Mg sample exhibited larger fraction and distribution of Al-rich phases as compared to the 20 wt.% and 10 wt.% of aluminium content. The microhardness values were also increased at 20 wt.% and 50 wt.% of aluminium content, comparable to the standard microhardness value of the annealed Mg. A similar trend in corrosion resistance of the Mg immersed in 3.5 wt.% NaCl solution was observed. The corrosion behaviour was evaluated based on potentiodynamic polarisation behaviour. The corrosion current density, icorr, is observed to decrease with the increase of Al composition in the Mg sample, corresponding to the increase in corrosion resistance due to the formation of aluminium oxide layer on the Al-rich surface that acted as the corrosion barrier. Overall, the inclusion of aluminium in this study demonstrates the promising development of high corrosion resistant Mg alloys.

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Effect of intermetallic compound on the Al-Mg composite materials fabricated by mechanical ball milling and spark plasma sintering

Cited by 36 publications

References 24 publications

Behavior of Intermetallic Compounds of Al-Ti Composite Manufactured by Spark Plasma Sintering

Behavior of Intermetallic Compounds of Al-Ti Composite Manufactured by Spark Plasma Sintering

Influence of Heat Treatment on the Corrosion Resistance of Aluminum-Copper Coating

Role of Aluminium on the Microstructure and Corrosion Behaviour of Magnesium Prepared by Powder Metallurgy Method

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