Crack propagation behavior of die-cast AlSiMgMn alloys with in-situ SEM observation and finite element simulation

Liu, Fei; Zhao, Haidong; Yang, Runsheng; Sun, Fengzhen

doi:10.1016/j.mtcomm.2019.01.009

Cited by 26 publications

(4 citation statements)

References 34 publications

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“…This is because the compounds dissolved into α-Al matrix during the solution process. The EDS analysis in Figure 2e proves that the intermetallics are α-Fe phase (Al 15 (FeMn) 3 Si), which has been also observed in other studies [25,26]. However, the Fe-rich intermetallics were not significantly affected by the T6 heat treatment as shown in Figure 2d, compared to Figure 2b.…”

Section: Resultssupporting

confidence: 83%

Microstructure and Mechanical Properties of High Vacuum Die-Cast AlSiMgMn Alloys at as-Cast and T6-Treated Conditions

et al. 2019

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Al–Si–Mg based alloys can provide high strength and ductility to satisfy the increasing demands of thin wall castings for automotive applications. This study has investigated the effects of T6 heat-treatment on the microstructures, the local mechanical properties of alloy phases and the fracture behavior of high vacuum die-cast AlSiMgMn alloys using in-situ scanning electron microscopy (SEM) in combination with nano-indentation testing. The microstructures of the alloys at as-cast and T6 treated conditions were compared and analyzed. It is found that the T6 heat treatment plays different roles in affecting the hardness and the Young’s modulus of alloy phases. This study also found that the T6 heat treatment would influence the failure modes of the alloys. The mechanisms of crack propagation in the as-cast and T6 treated alloys were also analyzed and discussed.

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Section: Resultssupporting

confidence: 83%

Microstructure and Mechanical Properties of High Vacuum Die-Cast AlSiMgMn Alloys at as-Cast and T6-Treated Conditions

et al. 2019

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“…Using threedimensional X-ray tomography technique can obtain 3D characteristics of pores, such as size, sphericity and spatial location. Therefore, the technique can describe the characteristics more accurately [16][17][18] .…”

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confidence: 99%

Influence of intensification pressures on pores in die-cast ADC12 alloys

Wang¹,

Yao²,

Zhao

et al. 2019

China Foundry

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Die casting process is widely applied in making Al parts. However, due to high speed of liquid metal flow in the die cavity, gases are prone to be entrapped in the filling, resulting in porosity defects. The X-ray computed tomography scanning technique was used to detect the pores in die-cast ADC12 alloys with different intensification pressures. The three-dimensional features of pores including pore size, number, sphericity have been obtained. The effect of different intensification pressures on two different kinds of pores, namely gas-pores and shrinkage pores, was analyzed. The results show that with increasing the pressure, the pore fractions and quantity gradually decrease. When the pressure increased to 85 MPa, the pores from gas entrapment during the mold filling were compressed, leading to a lower porosity fraction. The pressure cannot affect the pores in the samples with a thin wall (2 mm) due to a great solidification rate.

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“…Schnabel et al 7 stated that a fatigue assessment is based on the assessment concepts that are based on a wide range of experimental data. Leu and Yang 8 have investigated the crack propagation of this high strength and high ductile AlSiMgMn alloy die casting using the Scanning Electron Microscope (SEM) and using the finite element analysis. Dadic et al 9 found that the mould wear was inversely affected by the preheat temperature.…”

Section: Introductionmentioning

confidence: 99%

Exploring Casting Defects of AA7075 Alloy in the Gravity Die Casting Simulation of an IC Engine Block

Aneesh

Pawan

Mohan

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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The present work aims to investigate the different casting defects that arose during the gravity die casting process of an IC engine block made of AA 7075 alloy and also highlights the feasible solutions to eradicate those defects. The minimization of the casting defects is a very crucial task in an IC engine block. Experimental studies which are generally performed to reduce the casting defects are proven to be strenuous, costly, and time-consuming. To counter this, a thermal simulation model is proposed in the present study to identify the effect of the pouring temperature, mould temperature, and the number of chillers on the various casting defects such as cold shuts, air entrapment, mould erosion, and microporosity. A detailed parametric study is conducted on the proposed model to evaluate the outcomes of important process variables on the resulting casting defects. The simulation results predict, at pouring temperature of 963 K, mould temperature of 293.15 K and with the use of 2 chillers defect-free IC engine blocks can be casted. The optimum result obtained by the proposed model is validated by conducting a confirmative test predicting an average error of 6.98%. The proposed model is effective enough in getting rid of the numerous casting defects which cannot be identified using the traditional methods; thus increasing productivity. This can be used as an economical time-saving substitute to the experimental methods during casting of various engine parts.

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Crack propagation behavior of die-cast AlSiMgMn alloys with in-situ SEM observation and finite element simulation

Cited by 26 publications

References 34 publications

Microstructure and Mechanical Properties of High Vacuum Die-Cast AlSiMgMn Alloys at as-Cast and T6-Treated Conditions

Microstructure and Mechanical Properties of High Vacuum Die-Cast AlSiMgMn Alloys at as-Cast and T6-Treated Conditions

Influence of intensification pressures on pores in die-cast ADC12 alloys

Exploring Casting Defects of AA7075 Alloy in the Gravity Die Casting Simulation of an IC Engine Block

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