Metallurgical structure of A356 aluminum alloy solidified under mechanical vibration: An investigation of alternative semi-solid casting routes

Limmaneevichitr, Chaowalit; Pongananpanya, Songwid; Kajornchaiyakul, Julathep

doi:10.1016/j.matdes.2009.01.036

Cited by 64 publications

(27 citation statements)

References 15 publications

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“…Aluminium Alloys -Recent Trends in Processing, Characterization, Mechanical behavior and Applicationsbeen identiied to cause grain reinement, density increase, shrinkage, degassing, change size, shape and distribution of the second phase [43,44]. Reinement is produced through some mechanical means of breaking up newly developed dendrites, as in case of semisolid-metal (SSM) casting technique.…”

Section: Mechanical Modiication Techniquesmentioning

confidence: 99%

Effects of Modification Techniques on Mechanical Properties of Al-Si Cast Alloys

Ebhota¹,

Jen²

2017

Aluminium Alloys - Recent Trends in Processing, Characterization, Mechanical Behavior and Applications

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Mechanical, physical and chemical properties of a part depend on the size, morphology and dispersion of the constituents of the microstructure of the part's material. Therefore, this chapter discusses the diferent processes of altering the microstructure of Al-Si-based alloys to desired functional properties. These processes, commonly called modiication methods, were broadly categorised into three: chemical, thermal and mechanical methods. Chemical method, which involves the addition of some elements, in trace levels, to alloys to be modiied, is the best modiication option. The elements for modifying are called modiiers. The three commonly used modiiers (sodium, Na, strontium, Sr and antimony, Sb) are discussed. The chapter, however, notes that for optimal alloy's mechanical atributes, thermal treatment is usually combined with both chemical and mechanical modiication processes. The thermal method involves rapid cooling of alloy for modiication, while the mechanical method depends on force to break up large α-Al dendrites and plate-like Si phases.

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Section: Mechanical Modiication Techniquesmentioning

confidence: 99%

Effects of Modification Techniques on Mechanical Properties of Al-Si Cast Alloys

Ebhota¹,

Jen²

2017

Aluminium Alloys - Recent Trends in Processing, Characterization, Mechanical Behavior and Applications

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“…This makes the physical route a necessary option. The physical route mainly relies on the introduction of an external field into the molten alloys during solidification, such as ultrasonic vibration, electromagnetic stirring/vibration, pulse electric current and intensive shearing [10,11]. For example, Guo et al [12] introduced limited angular oscillation during initial solidification stage of AZ91 alloy and achieved well-refined microstructure and improved mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of rheo-squeeze casting AZ91-Ca magnesium alloy prepared by gas bubbling process

Zhang

Liu

et al. 2015

Materials & Design

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“…Other researchers report that by implementation of mechanical vibration, the nucle ation rate increased and grain size and porosity size decreased. Mechanical vibration leads to the average grain size of the primary phase became finer and more globular as the degree of vibration increased [5].…”

Section: Introductionmentioning

confidence: 99%

The effect of different melt treatments on alloying element distribution and mechanical properties of A356 aluminum alloy

Khodaei

Parvin²

2015

Russ. J. Non-ferrous Metals

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It is widely believed that needle plates of Fe rich intermetallic compounds decrease the mechan ical properties in A356 aluminium alloys. Moreover, the cooling rate has significant effect on the microstruc ture and the mechanical properties of this alloy and it can make the Fe rich intermetallic compounds finer. In this research the synergic effect of cooling rate and ultrasonic power and mechanical vibration on the microstructure of A356 has been investigated. Ultrasonic power was applied to the melt by a novel bath type ultrasonic power system. The distribution of alloying elements has also been studied by scanning electron microscope (SEM) and it has been analyzed by EDS. Mechanical properties of samples were investigated by hardness and tensile tests. Results indicate that ultrasonic power effectively modified the microstructure of A356 and it has better efficiency than mechanical vibration. The Fe rich phases in ultrasonically treated samples had the finest morphologies in the range of 10 micrometer. Ultrasonic power improves mechanical properties of samples even more than mechanical vibration. Comparison the obtained results with the results of other researchers, it is concluded that bath type ultrasonic power system are more effective than probe type ones.

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Metallurgical structure of A356 aluminum alloy solidified under mechanical vibration: An investigation of alternative semi-solid casting routes

Cited by 64 publications

References 15 publications

Effects of Modification Techniques on Mechanical Properties of Al-Si Cast Alloys

Effects of Modification Techniques on Mechanical Properties of Al-Si Cast Alloys

Microstructure and mechanical properties of rheo-squeeze casting AZ91-Ca magnesium alloy prepared by gas bubbling process

The effect of different melt treatments on alloying element distribution and mechanical properties of A356 aluminum alloy

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