Modeling homogenization behavior of Al-Si-Cu-Mg aluminum alloy

Sadeghi, Ida; Wells, Mary A.; Esmaeili, Shahrzad

doi:10.1016/j.matdes.2017.05.006

Cited by 20 publications

(11 citation statements)

References 37 publications

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“…It is well-known that both the matrix phase and second phase fragment during the rolling process, which in this study reduced the average length of the silicon particles nearly as well as the T6 treatment did. Meanwhile, as an indispensable step in rolling processing, homogenization treatment mainly caused the spheroidization of the Si eutectic phases, solute redistribution, and the removal of micro-segregation [23], as well as solution treatment [24]. Although the fragmentation of the eutectic Si took place mostly at the early stage, solute redistribution and the removal of micro-segregation with a long-time homogenization treatment were beneficial to quality improvement of rolling microstructure.…”

Section: Discussionmentioning

confidence: 99%

A Study of the Mechanical and Thermal Characteristics of an Al-Si-Fe Alloy Fabricated by Rolling and Heat Treatment

Guo

Wang

Yang

et al. 2018

Metals

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The effects of a rolling process and heat treatment on the mechanical and thermal properties of an Al-Si-Fe alloy were studied. The achieved thermal conductivity of the as-rolled alloy treated by a T6 heat treatment was 188.22 W/(m·K), which is as good as that of the as-cast alloy treated by the T6 heat treatment directly, mostly because of changes in the silicon morphology. The results also revealed that the lower quantity of precipitated Al8Fe2Si and Mg2Si phases had no obvious effect on the thermal properties of the material because the interphase spaces between precipitated phases were larger than the mean free path of electrons. However, the precipitated second phases influenced the elongation. The best mechanical properties of the Al-Si-Fe alloy were obtained by rolling and T6 treatment. The corresponding best tensile strength, yield strength, and elongation were 244 MPa, 295 MPa, and 9.56%, respectively, which are attributed to the near-spherical shape, small size, homogeneous distribution of the Si particles, and the precipitation strengthening of Mg2Si.

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Section: Discussionmentioning

confidence: 99%

A Study of the Mechanical and Thermal Characteristics of an Al-Si-Fe Alloy Fabricated by Rolling and Heat Treatment

Guo

Wang

Yang

et al. 2018

Metals

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“…Homogenization processing has a critical contribution by allowing the precipitation of excessive alloying elements in the solid solution before subsequent thermomechanical processing. However, the high solidification rate encountered in TRC (twin-roll casting) not only favours the supersaturation and metastable condition of the alloying elements, but also hinders their micro-segregation [21,22].…”

Section: Methodsmentioning

confidence: 99%

“…However, the high solidification rate encountered in TRC (twin-roll casting) not only favours the supersaturation and metastable condition of the alloying elements, but also hinders their microsegregation. [21,22] In the present study, the microstructural evolution of the typical dilute Al-Fe-Si (EN AW 8006) foil alloy during homogenization was investigated using optical and electron microscopy as well as differential scanning calorimetry (DSC). The effect of different homogenization practices on the formation of intermetallic phases was analysed.…”

Section: Introductionmentioning

confidence: 99%

Effects of Homogenization Conditions on the Microstructure Evolution of Aluminium Alloy EN AW 8006

Vončina

Kresnik

Volšak

et al. 2020

Metals

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The industrial production of products, such as foil and aluminium alloy strips, begins with the production of semi-finished products in the form of slabs. These are produced by the continuous casting process, which is quick and does not allow the equilibrium conditions of solidification. Non-homogeneity—such as micro and macro segregation, non-equilibrium phases and microstructural constituents, as well as stresses arising during non-equilibrium solidification—are eliminated by means of homogenization annealing. In this way, a number of technological difficulties in the further processing of semi-finished products can be avoided. The aim of this research was the optimization of the homogenization annealing of the EN AW 8006 alloy. With the Thermo-Calc software, a thermodynamic simulation of equilibrium and non-equilibrium solidification was performed. Differential scanning calorimetry (DSC) was performed on selected samples in as-cast state and after various regimes of homogenization annealing and was used for the simulation of homogenization annealing. Using an optical microscope (OM), a scanning electron microscope (SEM) and an energy dispersion spectrometer (EDS), the microstructure of the samples was examined. Based on the results, it was concluded that homogenization annealing has already taken place after 8 h at 580 °C to the extent, that the material is then suitable for further processing.

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“…Penambahan Cu dalam aloi Al-Si boleh meningkatkan kekuatan bahan dengan ketara dan menggalakkan berlakunya proses pemendakan pengerasan akibat daripada pembentukan fasa Al 2 Cu dan sebatian antara logam yang lain (Sadeghi et al 2017). Bagaimanapun, penambahan unsur Cu boleh menyebabkan kemuluran aloi Al berkurang serta rintangan karatan dan koyakan panas semakin lemah.…”

Section: Keputusan Dan Perbincangan Jangkaan Termodinamikunclassified

Kebolehbentukan-tikso Aloi 2014 dengan Penambahan Si dan Pengurangan Cu

Arif¹,

Omar²,

Sajuri³

2020

JSM

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Dalam kajian ini, kebolehbentukan-tikso aloi aluminium (Al) 2014 dengan penambahan unsur silikon (Si) dan pengurangan unsur kuprum (Cu) dikaji. Kandungan Si dan Cu dalam aloi 2014 diubah suai supaya kriteria kebolehbentukan-tikso dapat dipenuhi. Kebolehbentukan-tikso aloi 2014 dan aloi Al-terubah suai diukur secara termodinamik dengan menggunakan pakej perisian JMatPro dan seterusnya dibuktikan secara uji kaji melalui analisis terma dan analisis fasa. Hasil kajian ini mendapati bahawa sifat kebolehbentukan-tikso aloi 2014 dapat dipenuhi dengan penambahan Si dan pengurangan Cu. Apabila kandungan Si dalam aloi 2014 bertambah, kandungan fasa eutektik pada titik 'lutut' tertinggi yang terbentuk di atas lengkung pecahan cecair meningkat dengan ketara, manakala julat suhu pemejalan pula semakin mengecil. Di samping itu, pengurangan Cu pula menyebabkan julat suhu pemprosesan untuk pembentukan-tikso menjadi semakin luas lalu mengakibatkan sensitiviti pecahan cecair pada titik 'lutut' tertinggi menurun. Selain pembentukan fasa Al 2 Cu dan fasa θ-Al 5 Cu 2 Mg 8 Si 6 , kemunculan fasa π-Al 8 FeMg 3 Si 6 dengan struktur yang padat hasil daripada pengurangan Cu juga dijangka menyumbang kepada peningkatan sifat mekanik aloi Alterubah suai. Akhir sekali, aloi Al-terubah suai tersebut dijangka mampu digunakan untuk menghasilkan komponen otomotif seperti rod penyambung, aci sesondol dan aci engkol melalui proses pembentukan-tikso.

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Modeling homogenization behavior of Al-Si-Cu-Mg aluminum alloy

Cited by 20 publications

References 37 publications

A Study of the Mechanical and Thermal Characteristics of an Al-Si-Fe Alloy Fabricated by Rolling and Heat Treatment

A Study of the Mechanical and Thermal Characteristics of an Al-Si-Fe Alloy Fabricated by Rolling and Heat Treatment

Effects of Homogenization Conditions on the Microstructure Evolution of Aluminium Alloy EN AW 8006

Kebolehbentukan-tikso Aloi 2014 dengan Penambahan Si dan Pengurangan Cu

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