scholarly journals Microstructure as an essential aspect of EN AW 7075 aluminum alloy quality influenced by electromagnetic field during continuous casting process

2021 ◽  
Vol 75 (1) ◽  
pp. 31-37
Author(s):  
Aleksandra Pataric ◽  
Marija Mihailovic ◽  
Branislav Markovic ◽  
Miroslav Sokic ◽  
Andreja Radovanovic ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Electromagnetic Field ◽  
Aluminum Alloy ◽  
Continuous Casting ◽  
Cast Alloy ◽  
Casting Process ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Continuous Casting Process

Microstructure assessment is crucial for the design and production of high-quality alloys such as cast aluminum alloy ingots. Along with the effect of a more homogeneous microstructure to result in much better mechanical properties, better as-cast alloy quality indicates a higher efficiency of the aluminum alloys production process. During the aluminum alloy solidification process many microstructural defects can occur, which deteriorate the mechanical properties and hence decrease the usability of such an ingot. Application of the electromagnetic field during the vertical continuous casting process significantly reduces occurrence of these defects. In the present study, EN AW 7075 alloy samples were cast with and without application of an electromagnetic field and examined regarding the microstructure, electrical conductivity, and changes in the phase composition. The obtained results clearly show that it is possible to decrease or avoid casting defects by the electromagnetic field application as verified by the microstructure characterization and quantification, electrical conductivity tests and differential thermal analysis (DTA).

Electromagnetic Continuous Casting Process for Near Net Shape Aluminum Alloy Billet

2010 ◽  
Vol 654-656 ◽  
pp. 1400-1403
Author(s):  
Jong Ho Kim ◽  
Myoung Gyun Kim ◽  
Joon Pyo Park ◽  
Gyu Chang Lee ◽  
Ju Bum Kim
Keyword(s):  
Electromagnetic Field ◽  
Aluminum Alloy ◽  
Continuous Casting ◽  
Casting Process ◽  
Continuous Casting Process ◽  
Electromagnetic Casting ◽  
New Process ◽  
Near Net Shape ◽  
The Cost ◽  
Electromagnetic Continuous Casting

A new method and apparatus for the fabrication of high-quality, near net shaped aluminum alloy billets is developed by the combination of continuous casting and electromagnetic casting/stirring technique. Traditional machine for continuous casting process involves round, square and rectangular billets; therefore it requires additional multistep forging process to fabricate final products of complicated shape. A new process for the fabrication of near net shaped aluminum billets offers some advantages: the process of extrusion and forging is simplified and the cost of plastic working can be greatly reduced. In order to reduce the peculiar problems such as surface crack and internal defect due to inhomogeneous heat transfer of solidified billets, electromagnetic casting and stirring technique were adopted. The effect of electromagnetic field was compared by observing the microstructure of billets. Grain refinement of aluminum billet was clearly observed by applying electromagnetic field to continuous casting process.

Study on the Composite Interface of 4045/3004/4045 Aluminum Alloy Ingot

2011 ◽  
Vol 396-398 ◽  
pp. 213-216
Author(s):  
Ke Qin ◽  
Hui Xue Jiang ◽  
Jian Zhong Cui
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Continuous Casting ◽  
Bonding Strength ◽  
Casting Process ◽  
Continuous Casting Process ◽  
Casting Technology ◽  
Metallurgical Bonding ◽  
Composite Interface ◽  
Thickness Of Diffusion Layer

In this research, 4045/3004/4045 composite ingots were obtained by a semi-continuous casting process. The macrostructure, microstructure, elements distribution, mechanical properties of 4045/3004/4045 triple layers composite were studied. The results show that the composite interface is planar and clean with little evidence of porosity can be achieved by an optimum semi-continuous casting technology. The thickness of diffusion layer near composite interface can be controlled less than 30 μm. The bonding strength can reach to 100MPa which belongs to a kind of metallurgical bonding.

Effect of Non-Conventional Aging Treatments on the Tensile Properties of Non-Hipped Castings of Aluminum Alloy 354

2014 ◽  
Vol 875-877 ◽  
pp. 1397-1405 ◽  
Author(s):  
G. Dinesh Babu ◽  
M. Nageswara Rao
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Aluminum Alloy ◽  
Tensile Properties ◽  
Artificial Aging ◽  
Natural Aging ◽  
Single Step ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Automobile Components

Cast aluminum alloy 354 is used extensively for production of critical automobile components, owing to its excellent castability and attractive combination of mechanical properties after heat-treatment. With the advent of higher performance engines, there has been a steady demand to further improve the mechanical behavior of the castings made of the alloy, among others, through improvements in processing. The present study explores the possibility of improving tensile properties of the alloy by adopting certain non-conventional aging treatments. The non-conventional treatments include aging cycles similar to T6I4 and T6I6 referred to in the published literature, artificial aging in two steps instead of in single step and artificial aging preceded by various natural aging times. The results show that none of these non-conventional treatments leads to improvement of all tensile properties compared to the standard T61 treatment. Significant hardening takes place in the alloy due to natural aging. Changing the time of natural aging preceding artificial aging was found to have little effect on tensile properties.

Influence of Aging Temperatures and Times on Mechanical Properties of Vacuum High Pressure Die Cast Aluminum Alloy A356

2012 ◽  
Vol 445 ◽  
pp. 277-282 ◽  
Author(s):  
Xue Zhi Zhang ◽  
Kazi Ahmmed ◽  
Meng Wang ◽  
Henry Hu
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Thermal Treatment ◽  
Tensile Properties ◽  
Intermetallic Phase ◽  
Aged Alloy ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Die Cast ◽  
Wide Range

In this study a number of thermal treatment schemes over a wide range of temperatures between 120˚ to 350˚ C and times (30 120 minutes) have been experimented in an effort to understand the effect of thermal treatment on tensile properties of vacuum die cast modified aluminum alloy A356. The results show that, the morphology of eutectic silicon has a sound effect on the tensile properties of the tested alloy. The content of magnesium-based intermetallic phases, their morphology and distribution throughout the matrix affect the mechanical properties of the aged alloy as well. The reduction in the strengths of the alloy treated at 350°C for two hours should be at least attributed partly to the absence of the magnesium-based intermetallic phase. However the presence of sufficient amount of magnesium intermetallic phase had played important role in strengthening the alloy thermally treated at 200°C for 90 minutes.

scholarly journals 4032 aluminum alloy billet fabricated by continuous casting process with heat insulating and rapid cooling mold

2008 ◽  
Vol 58 (12) ◽  
pp. 650-655 ◽  
Author(s):  
Hidetoshi Takagi ◽  
Yasuhiro Uetani ◽  
Masayoshi Dohi ◽  
Toru Watanabe ◽  
Tomokazu Yamashita ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Continuous Casting ◽  
Casting Process ◽  
Continuous Casting Process ◽  
Rapid Cooling

scholarly journals Influence of MHD - plasma melt processing on the structure and properties of cast aluminum alloy A390

2021 ◽  
Vol 100 (4) ◽  
pp. 24-32
Author(s):  
A.V. Narivsky ◽  
◽  
O.M. Smirnov ◽  
V.E. Panarin ◽  
Yu.P. Skorobagatko ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Negative Impact ◽  
Structure Refinement ◽  
Physical And Mechanical Properties ◽  
Primary Silicon ◽  
Melt Processing ◽  
Cast Aluminum Alloy ◽  
Structure And Properties ◽  
Cast Aluminum

Growth of production of cast products and the desire of enterprises to reduce the cost of manufacturing metal products led to a significant increase in requirements for the structure and properties of aluminum alloys. Increasing of physical and mechanical properties of alloys is most effectively at the stages of their preparation in liquid state. At that, it is possible to affect effectively on the quality of cast metal by external actions on alloys, deep refining from gases and harmful impurities, active modifying of alloy, reducing or eliminating the negative impact of heredity of charge materials. The main disadvantage of the processes of structure refinement of alloys by using modifiers is instability of their results, which depends on various reasons. One of the most important reasons is providing conditions for the formation and preservation of active modifier particles in the melt volume. They are assimilating by liquid alloy and acting on crystal nucleus at crystallization. It is known that only ~10% particles are active of the total number of particles added with the ligature into the melt. Other particles dissolve in the melt, take away by the crystallization front, or push back on to intergranular boundaries. The considered methods of electromagnetic, MHD and plasma actions on liquid metal allow to refine and modify alloys without use of special reagents. The paper presents studying of the structure and properties of supereutectic silumin A390 after treatment in casting magnetodynamic installation (MDI) by submerged into melt the plasma argon jet and alternating electromagnetic field & magnetohydrodynamic (MHD) effects, including simultaneous combination. There are developed the scientific and technological bases of MHD-plasma processing of liquid hypereutectic silumin A390 and original equipment for their realization. It provides dispersed structure of solidified alloy. Thus, there is a significant decreasing of sizes both particles of primary silicon and dendrites of α-solid solution of aluminium. Also, strength characteristics of alloys increased to 10%, and elongation rises up in 1.5-2 times. Keywords: plasma jet, magnetodynamic installation (MDI), aluminum alloy, mechanical properties.

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