The influence of Cu rich intermetallic phases on the microstructure, hardness and tensile properties of Al–15% Mg2Si composite

Emamy, M.; Nemati, N.; Heidarzadeh, Akbar

doi:10.1016/j.msea.2010.01.063

Cited by 76 publications

(26 citation statements)

References 14 publications

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“…Therefore, an extensive literature survey has been performed for available experimental results [22][23][24][25][26][27][28][29][30][31]. The experimental datasets are divided into three sets as training, validation and test dataset to avoid the over fitting problems.…”

Section: Results and Explicit Formulation Of Nn Modelmentioning

confidence: 99%

Formulation of the Effect of Different Alloying Elements on the Tensile Strength of the in situ Al-Mg2Si Composites

Kurt

Oduncuoğlu

2015

Metals

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Abstract:In this paper, the effect of different alloying elements on the ultimate tensile strength of Al-Mg2Si composites is theoretically studied. The feed forward back propagation neural network with sigmoid function is used. The extensive experimental results taken from literature are modeled and mathematical formula is presented in explicit form. In addition, it is observed that magnesium and copper have a stronger effect on the ultimate tensile strength of Al-Mg2Si composites comparison to other alloying elements. The proposed model shows good agreement with test results and can be used to find the ultimate tensile strength of Al-Mg2Si composites.

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Section: Results and Explicit Formulation Of Nn Modelmentioning

confidence: 99%

Formulation of the Effect of Different Alloying Elements on the Tensile Strength of the in situ Al-Mg2Si Composites

Kurt

Oduncuoğlu

2015

Metals

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“…1, the initial microstructure of the as-received material includes primary Mg2Si reinforcement phases, which are surrounded by the pseudo-eutectic structures (Mg2Si/aA|). In addition, a large number of Cu-rich phase (0 and Q [33]) distributed along the grain boundaries can also be traced in the microstructure. The cylindrical specimens with 12 mm in height and 8 mm in diameter were prepared according to ASTM E209 to conduct the compression tests.…”

Section: Methodsmentioning

confidence: 99%

High Temperature Flow Behavior and Microstructure of Al-Cu/Mg2Si Metal Matrix Composite

Shafieizad

Zarei-Hanzaki

Ghambari

et al. 2015

Journal of Engineering Materials and Technology

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The present work deals with the high temperature flow behavior and the microstructure of the AI-Cu/Mg2Si metal matrix composite. Toward this end, a set of hot compression tests was pet formed in a wide range of temperature (573-773 K) and strain rate (O.OOI-O. I s ). The results indicated that the temperature and strain rate have a signifi cant effect on the flow softening and hardening behavior of the material. The work hard ening rate may be offset due to the occurrence of the restoration processes, the dynamic coarsening, and spheroidization of the second phase particles. In this regard, two phe nomenological constitutive models, Johnson-Cook (JC) and Arrhenius-type equations, were employed to describe the high temperature deformation behavior o f the composite. The JC equation diverged from experimental curves mainly in conditions which are far from its reference temperature and reference strain rate. This was justified considering the fact that JC model considers thermal softening, strain rate hardening, and strain hardening as three independent phenomena. In contrast, the Arrhenius-type model was more accurate in modeling of the flow behavior in wide range of temperature and strain rate. The minor deviation at some specified conditions was attributed to the negative strain rate sensitivity of the alloys at low temperature deformation regime

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“…7 and 8, some major outcomes can be obtained. First, the primary Mg 2 Si are faceted with some white points [12] , as shown in Fig. 8.…”

Section: +023dmentioning

confidence: 99%

Effect of reinforcement amount, mold temperature, superheat, and mold thickness on fluidity of in-situ Al-Mg2Si composites

Barenji

2018

China Foundry

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A luminum matrix composites (AMCs) are frequently used in different industries. This is due to the fact that AMCs are light and have good specific strength and stiffness. Thus, these new materials can be an appropriate option for replacement of the heavy alloys such as steels [1][2][3][4][5][6][7][8] .AMCs can be produced using casting methods such as ex-situ and in-situ processes. In the ex-situ process, reinforcement particles are added to the molten metal, usually accompanied by a stirring action. In the insitu process, the reinforcements of secondary phase are produced either in molten metal or in solidification. Therefore, the wetting problem of the secondary phases is solved by the in-situ method, and hence the distribution of the reinforcements is more uniform than that of the ex-situ method. This advantage of the in-situ Abstract: In the present study, the effects of mold temperature, superheat, mold thickness, and Mg 2 Si amount on the fluidity of the Al-Mg 2 Si as-cast in-situ composites were investigated using the mathematical models. Composites with different amounts of Mg 2 Si were fabricated, and the fluidity and microstructure of each were then analyzed. For this purpose, the experiments were designed using a central composite rotatable design, and the relationship between parameters and fluidity were developed using the response surface method. In addition, optical and scanning electron microscopes were used for microstructural observation. The ANOVA shows that the mathematical models can predict the fluidity accurately. The results show that by increasing the mold temperature from 25 °C to 200 °C, superheat from 50 °C to 250 °C, and thickness from 3 mm to 12 mm, the fluidity of the composites decreases, where the mold thickness is more effective than other factors. In addition, the higher amounts of Mg 2 Si in the range from 15wt.% to 25wt.% lead to the lower fluidity of the composites. For example, when the mold temperature, superheat, and thickness are respectively 100 °C, 150 °C, and 7 mm, the fluidity length is changed in the range of 11.9 cm to 15.3 cm. By increasing the amount of Mg 2 Si, the morphology of the primary Mg 2 Si becomes irregular and the size of primary Mg 2 Si is increased. Moreover, the change of solidification mode from skin to pasty mode is the most noticeable microstructural effect on the fluidity.

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The influence of Cu rich intermetallic phases on the microstructure, hardness and tensile properties of Al–15% Mg2Si composite

Cited by 76 publications

References 14 publications

Formulation of the Effect of Different Alloying Elements on the Tensile Strength of the in situ Al-Mg2Si Composites

Formulation of the Effect of Different Alloying Elements on the Tensile Strength of the in situ Al-Mg2Si Composites

High Temperature Flow Behavior and Microstructure of Al-Cu/Mg2Si Metal Matrix Composite

Effect of reinforcement amount, mold temperature, superheat, and mold thickness on fluidity of in-situ Al-Mg2Si composites

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