A study of the mechanical properties of an Al–Si–Cu alloy (ADC12) produced by various casting processes

Okayasu, Mitsuhiro; Ohkura, Y; Takeuchi, Shuhei; Takasu, Satoshi; Ohfuji, Hiroaki; Shiraishi, Toshihiko

doi:10.1016/j.msea.2012.02.073

Cited by 120 publications

(60 citation statements)

References 25 publications

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“…On the other hand, only a slight increase was found in r 0.2 for HMC compared with the GC value. The r UTS , r 0.2 , and e f for the HMC sample are about 268, 156 MPa, and 8.6 pct, respectively, which are all higher than those for GC Al alloys [22] and high pressure die cast Mg alloy, [10] e.g., UTS @ 220 MPa and elongation @ 3 pct. [27,28] Excellent experimental approach was carried out by Tzamtzis et al, [10] where they have examined the tensile properties of the refined AZ91D die cast alloy (MC-HPDC).…”

Section: B Mechanical Propertiesmentioning

confidence: 75%

“…It should be noted that the uniformity of HMC-AZ91 in the TD direction is still weak compared with that of Al alloys produced by the HMC. [22,26] This might be attributed to the complicated shape of the hcp structure of Mg alloys in comparison with the fcc structure of Al alloys. It is seen in Figure 3(a) that twin formations are obtained in HMC-AZ91, as indicated by the dashed circles, whereas these are not clearly seen in GC-AZ91.…”

Section: Resultsmentioning

confidence: 99%

“…Two different cast AZ91 samples were prepared: one by HMC and the other by GC. The HMC system was a modification of the original system [22] in which the casting process was conducted in high-purity argon gas to prevent oxidization and ignition. The molten metal was fed continuously into a round graphite mold 5 mm in diameter through a runner.…”

Section: Methodsmentioning

confidence: 99%

“…The cast sample was cooled directly by a spray of water droplets at 80 mL/min, which is almost the same as used for Al alloys produced by the HMC process. [22] To make the sample, a dummy rod made of SUS304 stainless steel was inserted into the heated mold to retract the liquid Mg alloy to the exit of the mold. A round rod sample (diameter 5 mm 9 150 mm) was produced in each casting operation at a speed of 90 mm/min.…”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Mechanical Strength and Failure Characteristics of Cast Mg-9 pctAl-1 pctZn Alloys Produced by a Heated-Mold Continuous Casting Process: Tensile Properties

Okayasu

Takeuchi

Ohfuji

2014

Metall Mater Trans A

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MITSUHIRO OKAYASU, SHUHEI TAKEUCHI, and HIROAKI OHFUJIThe mechanical properties and failure characteristics of a cast Mg alloy (AZ91: Mg-Al 8.9 -Zn 0.6 -Mn 0.2 ) produced by a heated-mold continuous casting process (HMC) are investigated. In a modification of the original HMC process, the cooling of the liquid alloy by direct water spray is carried out in an atmosphere of high-purity argon gas. The HMC-AZ91 alloy exhibits excellent mechanical properties (high strength and high ductility) that are about twice as high as those for the same alloy produced by conventional gravity casting. The increased material strength and ductility of the HMC sample are attributed to nanoscale and microscale microstructural characteristics. The fine grains and tiny spherical eutectic structures (e.g., Mg 17 Al 12 and Al 6 Mn) distributed randomly in the matrix of the HMC alloy result in resistance to dislocation movement, leading to high tensile strength. Basal slip on (0001) planes in the relatively organized crystal orientation of the HMC alloy, as well as grain boundary sliding through tiny spherical eutectic structures, results in high ductility. Details of the failure mechanism under static loading in the HMC alloy are also discussed using failure models.

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Section: B Mechanical Propertiesmentioning

confidence: 75%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Mechanical Strength and Failure Characteristics of Cast Mg-9 pctAl-1 pctZn Alloys Produced by a Heated-Mold Continuous Casting Process: Tensile Properties

Okayasu

Takeuchi

Ohfuji

2014

Metall Mater Trans A

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“…Note that the different SDAS is observed for the HMC samples depending on the Al alloy despite the same cooling process. The cooling rates (CR), estimated by CR = 2 × 10 4 SDAS −2.67 [13], are 6.4 K/s for GC-AC8A, 135.1 K/s for HMC-AC8A, 0.9 K/s for GC-ADC6 and 23.6 K/s for HMC-ADC6. This is caused by different alloy elements.…”

Section: Methodsmentioning

confidence: 99%

Material Properties of Various Cast Aluminum Alloys Made Using a Heated Mold Continuous Casting Technique with and without Ultrasonic Vibration

Okayasu

Miyamoto

Morinaka

2015

Metals

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This work was carried out to develop high-quality cast aluminum alloys using a new casting technology. For this purpose, commercial Al alloys were created by heated mold continuous casting (HMC) with ultrasonic vibration (UV). With the HMC process, the grain size and the crystal orientation of the Al alloys were controlled, i.e., fine grains with a uniformly organized lattice formation. In addition, an attempt was made to modify the microstructural formation by cavitation. These microstructural characteristics made excellent mechanical properties. Using UV in the continuous casting process, more fine and spherical grains were slightly disordered, which was detected using electron backscattered diffraction. The mechanical properties of the UV HMC Al alloys were slightly higher than those for the related cast Al alloys without UV. Moreover, the severe vibration caused higher mechanical properties. The lattice and dislocation characteristics of the cast samples made with and without UV processes were analyzed systematically using electron backscattered diffraction.

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Effect of Homogenization Process on Microstructure and Mechanical Properties of 4047 Aluminum Alloy

Cheng,

Huang,

Zhang

et al. 2024

Adv Eng Mater

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This study investigated the homogenization heat treatment process and microstructural evolution of 4047 aluminum alloy. The results revealed that the homogenization process induced partial dissolution of metastable phases and modification of the fine needle‐shaped eutectic Si. Within the 4047 aluminum alloy, the fine needle‐shaped eutectic Si underwent granulation, involving two stages: crystal dissolution and granulation of broken crystals. After optimal homogenization heat treatment, the eutectic Si phase transformed from a fine needle‐shaped structure to small, regular spherical structures, reducing stress concentration and improving the interfacial bonding capability and internal structure of the alloy matrix. This significantly reduces the likelihood of microcrack formation within the alloy and effectively hinders crack propagation, enhancing the alloy’s mechanical properties.This article is protected by copyright. All rights reserved.

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A study of the mechanical properties of an Al–Si–Cu alloy (ADC12) produced by various casting processes

Cited by 120 publications

References 25 publications

Mechanical Strength and Failure Characteristics of Cast Mg-9 pctAl-1 pctZn Alloys Produced by a Heated-Mold Continuous Casting Process: Tensile Properties

Mechanical Strength and Failure Characteristics of Cast Mg-9 pctAl-1 pctZn Alloys Produced by a Heated-Mold Continuous Casting Process: Tensile Properties

Material Properties of Various Cast Aluminum Alloys Made Using a Heated Mold Continuous Casting Technique with and without Ultrasonic Vibration

Effect of Homogenization Process on Microstructure and Mechanical Properties of 4047 Aluminum Alloy

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