Effect of annealing on the microstructures and mechanical properties of Al/Mg/Al laminates

Nie, Hongqi; Liang, Wei; Chen, Hongsheng; Zheng, Liuwei; Chi, Chengzhong; Li, Xianrong

doi:10.1016/j.msea.2018.06.065

Cited by 57 publications

(16 citation statements)

References 28 publications

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“…The Cu / 1Mg-composite contains the largest amount of magnesium and, therefore, after annealing at 200°C it becomes the strongest one due to the annealing hardening phenomenon of pure magnesium. A similar result was obtained before in the investigation of Al / Mg / Al laminates, which exhibited the best mechanical properties after annealing at 200°C for 1-4 hours [21].…”

Section: Confirms This Conclusionsupporting

confidence: 87%

Cu / Mg-composites: processing, structure and properties

2019

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The copper-based alloys with high strength and low electrical resistivity are of interest for many practical applications. In this study, Cu / Mg-composites with 1, 7 and 49 magnesium filaments in Cu-matrix have been obtained by hyrdoextrusion at room temperature. The structure, mechanical and electrical properties of the composite rods and thin wires in the deformed and annealed states have been investigated. The strength of the deformed Cu / Mg-composite with a minimal volume fraction of magnesium was found to be abnormally high. The increase of magnesium microhardness was revealed to be near the interface. A change in the lattice constant of the Cu-matrix in the deformed Cu / Mg-composites is discovered by the XRD-method. It has been concluded that, under severe plastic deformation, different solid solutions form on the Cu / Mg-interfaces due to mechanical alloying processes. The Cu / Mg-composite with a maximal volume fraction of Mg has the lowest strength in the deformed state, however, it becomes the strongest one after annealing at 200°C due to annealing hardening of magnesium. The temperature dependences of the electrical resistivity of Cu / Mg-composites differ significantly from each other. During heating, three eutectic transformations are realized in the composite with 7 Mg-filaments. As a result, the electrical resistivity of the deformed Cu / 7Mg-composite increases almost two times. The specific electrical resistivity of the composite with 49 Mg-filaments is a bit different from the electrical resistivity of deformed copper. The mechanisms of structure formation during the heating of these composites have been shown to be significantly different. The obtained results can be used for the development of high-strength Cu-based conductors.

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Section: Confirms This Conclusionsupporting

confidence: 87%

Cu / Mg-composites: processing, structure and properties

2019

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“…Moreover, the degree of recrystallization on the side of the A356 alloy is low. Nie et al 23 reported similar research results in which the number of recrystallized Al grains shows little difference at low annealing temperatures. After annealing, the proportion of LAGB at the AZ31B side decreases to 4.3%, which is significantly lower than the 29.8% measured on the A356 side.…”

Section: Evolution Of Microstructure Near the Interfacial Transition mentioning

confidence: 52%

Effect of Annealing Process on the Microstructures and Mechanical Properties of AZ31B/A356 Composite Plate Fabricated by Cast Rolling

Yang

Dong

et al. 2019

Mat. Res.

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“…In contrast, aluminum alloys are widely used in mechanical and aerospace fields due to their excellent properties, including light weight, high corrosion resistance, low cost, and good plastic formability [14][15][16]. Therefore, the Mg/Al laminated composites which combine the advantages of substrates and achieve appropriate coordination have attracted worldwide attention [7,[17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…However, problems, such as poor plate warpage and low bonding strength, still exist in the Mg/Al laminated composites. Al/Mg/Al laminated composites are prepared by hot rolling at 400 • C and annealed for 1-4 h in the temperature range of 200-400 • C, as reported by Nie [17]. Their results show that the thicker intermetallic compounds (IMCs) greatly deteriorate the bonding strength and plasticity due to the nucleation and quick propagation of cracks along Mg/Al interface after annealing at 400 • C. Abbasi [23] produced a Mg/Al composite by accumulative roll bonding (ARB) at different rolling temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…Their results show that the thicker intermetallic compounds (IMCs) greatly deteriorate the bonding strength and plasticity due to the nucleation and quick propagation of cracks along Mg/Al interface after annealing at 400 • C. Abbasi [23] produced a Mg/Al composite by accumulative roll bonding (ARB) at different rolling temperatures. Results reveal that the UTS of the composite is below 150 MPa with a rolling temperature of 400 • C. Furthermore, previous studies [17,21,22,24] mainly focus on the longitudinal tensile properties of Mg/Al laminated composite, and a few experiments have examined the transverse tensile properties. Shimoyama [25] analyzed the longitudinal and transverse tensile properties of AZ31 sheets prepared by periodical straining rolling.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure Characterization and Mechanical Property of Mg/Al Laminated Composite Prepared by the Novel Approach: Corrugated + Flat Rolling (CFR)

Wang

Ren

et al. 2019

Metals

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In this paper, Mg/Al laminated composites were successfully prepared at 400 °C by corrugated + flat rolling (CFR) with reduction ratios of 35% and 25% and subsequent annealing treatments were conducted at 200–350 °C for 30 min. A two-dimensional model was established to analyze the strain distribution during the first corrugated rolling process. Simulation results indicated that severe plastic deformation was formed at trough positions, which included more numerous refined grains than in the peak positions. The interfacial microstructure and mechanical property of the flattened composites along the rolling direction (RD) and the transverse direction (TD) were investigated. The results revealed that longitudinal discontinuous and transverse continuous interfacial intermetallic compounds (IMCs) were observed of the flattened as-rolled sample. Spatial distribution was provided for the grain microstructure along the thickness and rolling direction for AZ31B magnesium alloys of the CFR as-rolled composite. Mechanical property results showed that the longitudinal ultimate tensile strength (UTS) and elongation (EL) of the as-rolled sample reached 255 MPa and 4.14%, respectively. The as-rolled UTS along TD reached 325 MPa, about 30% higher than that along the RD. After heat treatment, the anisotropy of mechanical properties remained. The microstructure evolution and mechanical properties were discussed in detail.

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Effect of annealing on the microstructures and mechanical properties of Al/Mg/Al laminates

Cited by 57 publications

References 28 publications

Cu / Mg-composites: processing, structure and properties

Cu / Mg-composites: processing, structure and properties

Effect of Annealing Process on the Microstructures and Mechanical Properties of AZ31B/A356 Composite Plate Fabricated by Cast Rolling

Microstructure Characterization and Mechanical Property of Mg/Al Laminated Composite Prepared by the Novel Approach: Corrugated + Flat Rolling (CFR)

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