On mechanism of in-situ microwave casting of aluminium alloy 7039 and cast microstructure

Mishra, Radha Raman; Sharma, Apurbba Kumar

doi:10.1016/j.matdes.2016.09.041

Cited by 79 publications

(27 citation statements)

References 23 publications

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“…In recent years different advanced methods, like microwave energy [5][6][7], electromagnetic technology [8], and ultrasonic technology [9][10][11] were employed as material processing techniques for the processing of materials including aluminum alloy. Ultrasonic assisted manufacturing technology has been studied for decades in metal manufacture.…”

Section: Introductionmentioning

confidence: 99%

Possible Effects and Mechanisms of Ultrasonic Cavitation on Oxide Inclusions during Direct-Chill Casting of an Al Alloy

Zhang

et al. 2018

Metals

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Oxide films or inclusions can reduce the continuity and integrity of materials and they always lead to a significant reduction in the mechanical properties of an aluminum alloy. They can greatly reduce the plastic flow behavior of materials, thus affecting the subsequent processing performance. Therefore, an effective ultrasonic assisted preparation technology has been applied to industrial manufacturing of large-scale aluminum alloy ingots (with diameter: Φ = 1250 mm and height: h = 3750 mm). However, the mechanisms of ultrasonic purification on the large-scale ingots are not clear. Therefore, a number of aluminum alloy casting experiments were carried out to produce a conventional hot top semi-continuous ingot (CHTI) and an ultrasonic hot top semi-continuous ingot (UHTI) in this work. The microstructures of CHTI and UHTI were analyzed by optical microscopy (OM) and scanning electron microscopy (SEM). The results indicated that there were some oxide film defects in the CHTI but some finely dispersed inclusion particles were discovered in the UHTI. The X-ray diffraction (XRD) data showed that the component of inclusion was Al2O3. According to the different cavitation effects of the different areas of the molten aluminum, the process of ultrasonic purification was divided into three periods and the mechanisms in each period were separately studied.

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Section: Introductionmentioning

confidence: 99%

Possible Effects and Mechanisms of Ultrasonic Cavitation on Oxide Inclusions during Direct-Chill Casting of an Al Alloy

Zhang

et al. 2018

Metals

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“…Therefore, the waste material will receive the heat produced in the crucible mainly by conduction, in a direct manner. Therefore, it is important to analyse the influence of the microwave field on the temperature produced in the melting crucible [8], [9]. To determine the temperature at which the charge is heated in the microwave furnace, the amount of heat generated by the microwave in the crucible was determined by the wave -material energy balance [7].…”

Section: Introductionmentioning

confidence: 99%

Simulation of the Microwave Field Influence on Wastes Melting

Serban¹,

Imnr²,

Dumitrescu³

et al. 2020

ENS

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The paper determines the influence of the microwave field on the temperature produced in the melting crucible during the recovery process of nonferrous metals from industrial wastes. The particularities of the practical system are taken into account. An entire energetic layout, including the wave generation, wave propagation and the wave interaction with the SiC crucible, was performed using the MatLab simulation program.

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“…However, the applications of magnesium alloys are greatly restricted due to their poor corrosion resistance [12,13]. 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%

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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On mechanism of in-situ microwave casting of aluminium alloy 7039 and cast microstructure

Cited by 79 publications

References 23 publications

Possible Effects and Mechanisms of Ultrasonic Cavitation on Oxide Inclusions during Direct-Chill Casting of an Al Alloy

Possible Effects and Mechanisms of Ultrasonic Cavitation on Oxide Inclusions during Direct-Chill Casting of an Al Alloy

Simulation of the Microwave Field Influence on Wastes Melting

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

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