Effect of Heat Treatment on the Mechanical Properties of a Rheocast 357 Alloy Using the SEED Method

Samuel, E. Isaac; Zheng, Chang-Qing

doi:10.4028/www.scientific.net/msf.690.169

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…As stated, the data presented here above is for the alloy 357. The same approach was applied to other common Al-Si-Mg foundry alloys in die casting [6]. As a result, we can state, from the slurry characteristics and the mechanical properties of die cast parts, that the SEED process can be used in non-drained mode for the most common alloys with the same quality as in the drained version.…”

Section: Figure 5 Comparison Of Temperature Evolution -With and Witho...mentioning

confidence: 95%

“…Figures 6 and 7 present the similarities in the microstructures for both versions of the process. Table 1 compares the mechanical properties obtained in non-drained mode with those obtained in drainage mode [5] for similar T6 heat treatment. SEED with drainage T6 Temper SEED without drainage T6 Temper [5] UTS (MPa) 357 ± 7 354 ± 5 YS (MPa) 295 ± 7 298 ± 7 %El.…”

Section: Figure 5 Comparison Of Temperature Evolution -With and Witho...mentioning

confidence: 99%

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New Developments with the SEED Technology

Côté

Larouche

Chen

2012

SSP

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The SEED technology, a rheocasting process based on the slurry-on-demand approach, is an emerging technology that was developed in the mid-2000s. Many publications with regard to the process and to alloy development using this technology were made since, and several industrial units are operated worldwide. Moreover, the process is still actively developed and is fully supported by a team of scientists, engineers and technicians. With a global objective of addressing the user requirements and the industry needs, works were conducted toward optimization of the process and equipment. At first, the focus was on developing a simplified version of the SEED process to eliminate the so-called “drainage” phase while preserving the prime quality of the slurry produced. Improvement of some system components and integration of new features were also targeted to secure the overall equipment efficiency (OEE) and increase the process reliability. This work, backed with the optimization of process parameters and comprehensive techniques adapted for semi solid casting, led to the consolidation and even improvement of the properties of the parts produced for the common foundry alloys 356/357 and 319. Furthermore, the non-drained SEED version was applied to the validation of the process capabilities for uncommon cast alloys with works on 6061 wrought alloy, Duralcan metal matrix composite, and others. The results confirmed that the SEED process can efficiently be used in non-drained mode and achieve the same quality of slurry as the drained version originally developed. It is now proven in the industrial scale and actually integrated in the updated industrial equipment. Moreover, the capabilities of the process for special alloys and applications are still the subject of active development works.

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Section: Figure 5 Comparison Of Temperature Evolution -With and Witho...mentioning

confidence: 95%

Section: Figure 5 Comparison Of Temperature Evolution -With and Witho...mentioning

confidence: 99%

New Developments with the SEED Technology

Côté

Larouche

Chen

2012

SSP

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“…NRC-ATC has been involved with SEED rheocasting for the better part of a decade, having successfully obtained high integrity Al-Si castings, demonstrating very favorable levels of mechanical properties [6][7][8]. The present work serves to illustrate an offshoot study carried out on the mechanical performance of SEED-rheocast 357 alloy support bracket arms.…”

Section: Introductionmentioning

confidence: 92%

On the Rheocasting of High Integrity Hollow Shape Components for Automotive Applications Using 357 Aluminum Alloy

Samuel

Zheng

Côté

2012

SSP

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Recent studies regarding semi-solid casting as a viable alternative to conventional liquid metal casting have been met with considerable interest. The dual nature of semi-solid materials results in a marked decrease in internal defects otherwise associated with conventional casting methods. In recent years, the National Research Council Canada - Aluminum Technology Centre (NRC-ATC) has dedicated itself to better understanding the behaviour of semi-solid aluminum alloys, notably 357, using the SEED (Swirled Enthalpy Equilibration Device) rheocasting method. SEED is a novel process which relies on the mechanical agitation and cooling of molten aluminum to produce a semi-solid billet. This billet is then injected into a die to yield the desired cast shape. The current work focuses on the rheocasting of a 357 aluminum alloy support bracket, consisting of four rings. Material flow around a ring is known to result in a welding of the two metal fronts. Traces of porosity and oxides can sometimes be found at the weld, unless preventative measures are taken. These include the use of overflows attached to the ring via a web as well as a careful control of the casting parameters. At NRC-ATC, several parts were rheocast and then subjected to both destructive and non-destructive testing, in an effort to better understand the material flow behaviour around these rings. The results obtained are presented herein.

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Alloys for semisolid processing

Zoqui

2024

Comprehensive Materials Processing

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Effect of Heat Treatment on the Mechanical Properties of a Rheocast 357 Alloy Using the SEED Method

Cited by 4 publications

References 11 publications

New Developments with the SEED Technology

New Developments with the SEED Technology

On the Rheocasting of High Integrity Hollow Shape Components for Automotive Applications Using 357 Aluminum Alloy

Alloys for semisolid processing

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