Intermetallic compounds and antiphase domains in Al/Mg compound casting

Hajjari, E.; Divandari, M.; Razavi, Seyed Hossein; Homma, Tomoyuki; Kamado, Shigeharu

doi:10.1016/j.intermet.2011.12.001

Cited by 43 publications

(24 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The chemical composition of the grey phase area (analysis at point 3: 58.88 at.% Al, 40.52 at.% Mg and 0.6 at.% Si) is similar to that of the Mg2Al3 intermetallic phase, which confirms the above findings that the grey matrix in the bonding zone near the AlSi17 is this phase. [18][19][20][21], the bonding zone in the Mg/Al couples fabricated by compound casting in the vicinity of Mg was also composed of the eutectic (Mg17Al12 and a solid solution of Al in Mg). The microstructure and phase composition of the bonding zone change gradually with increasing distance from the AZ91 alloy.…”

Section: Resultsmentioning

confidence: 99%

“…In this process, a metal alloy in the liquid state is cast directly onto a solid metal alloy substrate. The literature concerning this method has discussed the joining of commercially pure Mg to AlMg1 aluminum alloy [17], pure Mg to pure Al [18][19][20][21]. A continuous transition bonding zone forms between Mg and Al as a result of diffusion processes occurring at the reactive interface.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microstructure of the Bonding Zone Between AZ91 and AlSi17 Formed by Compound Casting

Mola

Bucki

Dziadoń

2017

Archives of Foundry Engineering

View full text Add to dashboard Cite

This paper discusses the joining of AZ91 magnesium alloy with AlSi17 aluminium alloy by compound casting. Molten AZ91 was cast at 650 o C onto a solid AlSi17 insert placed in a steel mould under normal atmospheric conditions. Before casting, the mould with the insert inside was heated up to about 370 o C. The bonding zone forming between the two alloys because of diffusion had a multiphase structure and a thickness of about 200 µm. The microstructure and composition of the bonding zone were analysed using optical microscopy, scanning electron microscopy and energy dispersive X-ray spectroscopy. The results indicate that the bonding zone adjacent to the AlSi17 alloy was composed of an Al3Mg2 intermetallic phase with not fully consumed primary Si particles, surrounded by a rim of an Mg2Si intermetallic phase and fine Mg2Si particles. The bonding zone near the AZ91 alloy was composed of a eutectic (an Mg17Al12 intermetallic phase and a solid solution of Al and Si in Mg). It was also found that the compound casting process slightly affected the AZ91alloy microstructure; a thin layer adjacent to the bonding zone of the alloy was enriched with aluminium.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructure of the Bonding Zone Between AZ91 and AlSi17 Formed by Compound Casting

Mola

Bucki

Dziadoń

2017

Archives of Foundry Engineering

View full text Add to dashboard Cite

show abstract

“…As can be seen from Figure 6a, Ni metal completely reacted with the base alloys to form a reaction layer with a thickness of approximately 500 µm, and the as-sprayed continuous Ni layer was absent with a pouring temperature of 720 • C. According to the EDS results (Table 2) and the phase diagrams [26][27][28], the layers adjacent to the AZ31 and 6061 base alloys were characterized as eutectic structure ( form a reaction layer with a thickness of approximately 500 μm, and the as-sprayed continuous Ni layer was absent with a pouring temperature of 720 °C. According to the EDS results (Table 2) and the phase diagrams [26][27][28], the layers adjacent to the AZ31 and 6061 base alloys were characterized as eutectic structure (Al12Mg17 + Mg) and intermetallic phase Al3Mg2, respectively, whereas the middle layer was characterized as complex Mg-Al-Ni intermetallic compounds maybe including Al3Ni, Mg17Al12, and Mg2Ni. The elemental distribution in Figure 6b also reveals that there is a clear diffusion zone between AZ31 and 6061 alloys, in which the Mg and Al elements diffuse into each other across the interface, whereas the Ni element diffuse to both base alloys.…”

Section: Methodsmentioning

confidence: 96%

Microstructure and Mechanical Properties of Mg/Al Clad Bars with Ni Interlayer Processed by Compound Castings and Multi-Pass Caliber Rolling

Chen

Yin

et al. 2018

Metals

View full text Add to dashboard Cite

Magnesium/aluminium clad bars were fabricated by compound casting and multi-pass warm caliber rolling. A Ni interlayer prepared using a plasma spraying process was inserted between the parent metals to improve the interfacial characteristics during the casting process, and the effect of caliber rolling on the evolution of the interfacial microstructure and mechanical properties of the Mg/Ni/Al composites was investigated. The results show that the formation of Mg-Al intermetallic phases was impeded effectively by the Ni interlayer and a typical AZ31/Ni/6061 multilayer structure with metallurgical bonding was formed during the compound casting process. In addition, an inhomogeneous strain distribution in the AZ31 and 6061 alloys were characterized during the rolling process. The AZ31 clad layer accommodated a larger proportion of the plastic strain during the initial passes, while the strain in the Mg core layer increased with increasing number of passes. The Ni interlayer fragmented during the rolling process, and transformed into the dispersed particles at the interface. Meanwhile, the fresh AZ31 and 6061 base alloys squeezed out and bonded together under the rolling force, and a well-bonded interface with no visible defects was formed.

show abstract

“…금속/ 금속 하이브리드 부품의 제조방법으로는 침투법, 분말야금공 정 등이 활용될 수 있으나 생산성이 비교적 낮고 제조원가가 높은 단점이 있으며, 이에 비해 공정이 간단한 복합주조공정 에 대한 연구가 주목을 받고 있다 [2][3][4][5][6] …”

Section: 서 론unclassified

Interfacial Characteristics of Al/Cu Hybrid Materials Prepared by Compound Casting

Kim¹,

Kim²

2015

Journal of Korea Foundry Society

View full text Add to dashboard Cite

Aluminum-based hybrid parts were fabricated through a compound casting process with Al or Cu inserts which can be used for applications requiring high conductivity. Because the interface stability between the insert and the aluminum matrix is important, the effects of process variables on the interfacial adhesion strength were investigated. Additions of Cu and Mg to Al melt were found to enhance the adhesion strength, though the melt fluidity was slightly deteriorated when a small amount of Mg was added. An isothermal heating process after casting further improved the strength. However AlCu intermetallic compounds formed and their thickness increased during the heating process. As a result, deterioration in the interfacial adhesion strength was observed after an excessive annealing treatment.

show abstract

Intermetallic compounds and antiphase domains in Al/Mg compound casting

Cited by 43 publications

References 18 publications

Microstructure of the Bonding Zone Between AZ91 and AlSi17 Formed by Compound Casting

Microstructure of the Bonding Zone Between AZ91 and AlSi17 Formed by Compound Casting

Microstructure and Mechanical Properties of Mg/Al Clad Bars with Ni Interlayer Processed by Compound Castings and Multi-Pass Caliber Rolling

Interfacial Characteristics of Al/Cu Hybrid Materials Prepared by Compound Casting

Contact Info

Product

Resources

About