An investigation on the microstructural evolution and mechanical properties of A380 aluminum alloy during SIMA process

Parshizfard, E.; Shabestari, S.G.

doi:10.1016/j.jallcom.2011.07.068

Cited by 55 publications

(26 citation statements)

References 13 publications

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“…Materials are manufactured at the temperature of solid-liquid coexistence and perform good high temperature formability [3][4][5]. Magneto-hydrodynamic (MHD) stirring casting, spray casting and strain-induced melting activation (SIMA) are three common semi-solid process for getting fine and globular grains that can enhance formability at elevated temperatures [6,7].…”

Section: Strain-induced Melt Activation (Sima) Processmentioning

confidence: 99%

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Microstructural Characteristics and Mechanical Behaviors of New Type SIMA Processed Aluminum Alloy

Lin¹,

Hung²,

Lui³

2017

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

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In this chapter, a new type strain-induced melt activation (SIMA) process for Al-Mg-Si alloys was used. The microstructural characteristics, formability at elevated temperature and mechanical properties were estimated. The high-hardness globular grain boundaries are formed by eutectic phases. This new type SIMA process has proved that it can decrease high temperature compression resistance and improve ability of metal flowing at high temperature. After SIMA forming process, the mechanical properties of materials can be improved via artificial aging and can be competed with general artificial aged materials. All results show that this SIMA process is a potential process.

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Section: Strain-induced Melt Activation (Sima) Processmentioning

confidence: 99%

“…High liquid fraction results in improvement of high temperature formability according to Refs. [3,6,7].…”

Section: Microstructure Analysis and Globule Size Measuringmentioning

confidence: 99%

Microstructural Characteristics and Mechanical Behaviors of New Type SIMA Processed Aluminum Alloy

Lin¹,

Hung²,

Lui³

2017

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

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“…Magnetohydrodynamic casting, spray casting, and strain-induced melting activation (SIMA) are commonly used semi-solid processes for producing fine and globular grains that can enhance high-temperature formability [3,4]. The SIMA process is low-cost and utilizes stable procedures and simple equipment compared with other semi-solid processes such as magnetohydrodynamic casting and spray casting [5,6]. The steps of common and traditional SIMA process are: (1) casting, which produces a dendritic structure; (2) hot work, which disintegrates the initial structure; (3) cold work, which introduces strain energy into the alloy; and (4) heat treatment, which makes the material recrystallize and partially melt at the temperature of solid-liquid coexistence.…”

Section: Introductionmentioning

confidence: 99%

“…Our previous research showed that this SIMA process can promote high-temperature compressibility and formability, and that the mechanical properties of SIMA-processed alloys are sufficiently high for practical applications after artificial aging [7][8][9]. Casting, hot extrusion, and salt bath (to attain a regime in which solid and liquid phases coexist in equilibrium) [5,6] are the three major steps of this process. The microstructural evolution of this SIMA process is shown in Figure 1b.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure Evolution and Microstructural Characteristics of Al–Mg–Si Aluminum Alloys Fabricated by a Modified Strain-Induced Melting Activation Process

Lin

Hung

Lui

2017

Metals

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Abstract:A modified strain-induced melting activation (SIMA) process is shown to improve high-temperature formability. The microstructural characteristics of the spheroidized grains of SIMA-processed alloys affect high-temperature formability. The effects of hot extrusion parameters and chemical composition on the evolution of spheroidized grains were investigated using several 6xxx series aluminum alloys subjected to a modified SIMA process. The results show that 6066 aluminum alloy is the most suitable alloy for the SIMA process, as it contains sufficient Mg, Si, Cu, and Mn. Adequate amounts of Mg, Si, and Cu lead to a high liquid fraction, and a sufficient addition of Mn inhibits grain growth. Proper hot extrusion parameters are essential, because initial fine and uniform recrystallized grains lead to fine and uniform globules. The phases at the global grain boundaries of 6066 aluminum alloy are eutectic phases of Al and Si, Al and Mg 2 Si, and Al and Al 2 Cu, as analyzed using transmission electron microscopy.

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Thermomechanical treatment of A380 aluminum alloy for globular thixo feedstock

Dumanić

Krolo

Lela

et al. 2020

Materialwissenschaft Werkst

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The main aim of this paper is to present and evaluate thermomechanical treatment for semi‐solid feedstock production of A380 (AlSi9Cu3(Fe)) aluminum alloy. Equal channel angular pressing (ECAP) is used to heavily deform and refine as cast dendritic microstructure with needle like eutectic appearance. The deformed microstructure is easily changed to globular microstructure by recovery and recrystallization mechanisms during heating at the semi‐solid temperature range which is a crucial factor for quality semi‐solid feedstock preparation. The microstructural evolutions investigations during semi‐solid heating at different holding times is carried out utilizing optical microscope and scanning electron microscope accompanied by energy dispersive x‐ray spectroscopy. Homogeneous distribution of the silicon particles and intermetallic compounds around globular primary aluminum phase is observed. The used approach is appropriate and seems highly promising for preparation of the quality semi‐solid feedstock.

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An investigation on the microstructural evolution and mechanical properties of A380 aluminum alloy during SIMA process

Cited by 55 publications

References 13 publications

Microstructural Characteristics and Mechanical Behaviors of New Type SIMA Processed Aluminum Alloy

Microstructural Characteristics and Mechanical Behaviors of New Type SIMA Processed Aluminum Alloy

Microstructure Evolution and Microstructural Characteristics of Al–Mg–Si Aluminum Alloys Fabricated by a Modified Strain-Induced Melting Activation Process

Thermomechanical treatment of A380 aluminum alloy for globular thixo feedstock

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