Microstructure evolution and semi-solid deformation behavior of an A356 aluminum alloy processed by strain induced melt activated method

Hassas-Irani, S.B.; Zarei-Hanzaki, A.; Bazaz, B.; Roostaei, Ali A.

doi:10.1016/j.matdes.2012.10.041

Cited by 63 publications

(28 citation statements)

References 35 publications

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“…The constitutive laws for semi-solid alloys presented in literature can only describe part of the semi-solid deformation behavior. Most of research work concentrated on the strain softening stage [14] or microstructural 3 evolution process [15]. At present there is no constitutive law that can be applied to comprehensively capture the behavior of thixoforming at different deformation stages.…”

Section: Introductionmentioning

confidence: 99%

Development of a visco-plastic constitutive modeling for thixoforming of AA6061 in semi-solid state

Wang

Phillion

2014

Journal of Alloys and Compounds

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A visco-plastic constitutive equation for thixoforming is proposed that takes into account the effect of the liquid fraction along with other factors i.e. strain rate and temperature. The incorporation of liquid fraction allows the model to be applied to any type of semi-solid aluminum alloys a significant improvement over the previous empirical models. Based on the thixotropic compression tests for the semi-solid AA6061 aluminum alloy, this visco-plastic constitutive model is validated by means of simulation on the ABAQUS platform.

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Section: Introductionmentioning

confidence: 99%

Development of a visco-plastic constitutive modeling for thixoforming of AA6061 in semi-solid state

Wang

Phillion

2014

Journal of Alloys and Compounds

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“…However, there is strong competition with highly economical and improved casting processes such as vacuum casting, squeeze casting, fully automated die casting and optimized casting aluminum alloys. [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Microstructure of A356 and Aa7075 Poured by Cooling Slope Casting at Different Pouring Temperatures.

Mohamed

2018

Journal of Al-Azhar University Engineering Sector

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Semisolid metal processing (SSMP) is a technology that involves the formation of metal alloys between solidus and liquidus temperatures. For the step to operate successfully, the microstructure of the starting material consist of solid near-globular grains surrounded by a liquid matrix and a wide solidus-to-liquidus transition area. Thus the process of SSMP relies on the thixotropic behavior of alloys with a spheroidal rather than a dendritic microstructure in semisolid state. Now, this process is industrially successful, generating a variety of products with high quality parts in many industrial sectors. This technology promises advantages over conventional metal forming technologies. Aluminum alloys are among the most prominent and well-known materials used in the mechanical construction and automotive industries. In this investigation, effect of pouring temperature and the type of the materials poured was studied. Molten A356 and AA7075 alloys with temperatures of 620 °C, 640 °C and 660 °C was poured on the surface of inclined plates then casting in the mould.

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“…Among the mentioned methods, the solid states have special advantages such as the reduced amount of entrapped liquid and more globular particles which subsequently enhance thixoformability. Numerous researches have been allocated to study and investigate the microstructure alteration of different alloys during SIMA and RAP processes [12][13][14][15]. SIMA is a potential method with the significant commercial advantages of simplicity and low equipment cost in fabrication process and has been demonstrated to be applicable to most engineering alloys, including aluminium, magnesium, copper and ferrous alloys [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…Most of the recent studies in the field of Semi-Solid Metal Forming (SSMF) have been paid to Al-Si alloys as potential thixoformable materials due to their wide processing window and high fluidity in the semi-solid region [13,21]. Therefore, a detailed knowledge about their thixotropic feedstock preparation criteria and rheological behavior as well as their final mechanical properties is very required.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Deformation Ratio and Heat Treatment Time on the Microstructure and Mechanical Properties of A356 Aluminium Alloy During SIMA Process

Elahi¹

2017

IJMPEM

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The influence of Strain Induced Melt Activated (SIMA) parameters on the globularization of α-Al and microstructure in A356 aluminium alloy were investigated in the present study. After production of samples using conventional permanent mold casting and cold rolling at various reduction, they were heat treated at 590°C for different holding time to spherodize the microstructure. The results indicated that, the grains became smaller, more spherical and having a homogenous distribution by increasing the deformation ratio. Increasing the holding time in heat treatment results the growth of globular grains. The necessary strain for recrystallization is about 15% and the optimum condition was achieved in the samples were 15% rolled and heat treated for 15 minutes at semi-solid temperature, regarding the maximum shape factor and minimum globular grains size. Further increasing in holding time is responsible for grain growth and hardness decline.

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Microstructure evolution and semi-solid deformation behavior of an A356 aluminum alloy processed by strain induced melt activated method

Cited by 63 publications

References 35 publications

Development of a visco-plastic constitutive modeling for thixoforming of AA6061 in semi-solid state

Development of a visco-plastic constitutive modeling for thixoforming of AA6061 in semi-solid state

Microstructure of A356 and Aa7075 Poured by Cooling Slope Casting at Different Pouring Temperatures.

The Effect of Deformation Ratio and Heat Treatment Time on the Microstructure and Mechanical Properties of A356 Aluminium Alloy During SIMA Process

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