Tailoring the mechanical properties of hypereutectic in situ Al–Mg2Si composites via hybrid TiB2 reinforcement and hot extrusion

• Autorzy: Moazami Mohammad Rasool , Razaghian Ahmad , Mirzadeh Hamed , Emamy Massoud

Identyfikatory

DOI

10.1007/s43452-022-00416-6

• Języki publikacji: EN

Abstrakty

EN

Microstructure and mechanical properties of Al-15Mg 2 Si-xTiB 2 hybrid composites in the as-cast and wrought conditions were studied. TiB 2 addition led to a significant refinement and modification of primary Mg2Si particles (up to 3 wt% TiB 2 addition) via the heterogeneous nucleation mechanism, which improved the as-cast tensile properties. Further additions led to the appearance of coarse needle-shaped Al 3Ti particles with the consequent deterioration of tensile properties. Hot deformation by extrusion process and elevated-temperature exposure resulted in the fragmentation, dispersion, and spheroidization of pseudo-eutectic Mg 2 Si constituents, which led to a significant enhancement of tensile properties. The ultimate tensile strength of the extruded Al-15Mg 2 Si-3TiB 2 composite was 285 MPa with the total elongation of ~ 8%, which revealed a good strength-ductility balance. The corresponding value for the as-cast Al-15Mg 2 Si composite was only 198 MPa%. Accordingly, this study revealed that the presence of optimum amount of TiB 2 combined with high-temperature thermo-mechanical processing could remarkably improve the mechanical properties of the hypereutectic Al-Mg-Si composites in terms of strength-ductility balance, quality index, and tensile toughness.

Słowa kluczowe

EN

metal-matrix composites; microstructure; dynamic recrystallization; DRX; mechanical performance; hot extrusion

PL

kompozyt z osnową metaliczną; mikrostruktura; rekrystalizacja dynamiczna; DRX; właściwości mechaniczne; wytłaczanie na gorąco

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2022
• Tom: Vol. 22, no. 2
• Strony: art. no. e87, 1--9
• Opis fizyczny: Bibliogr. 32 poz., rys., tab., wykr.

Twórcy

autor

Moazami Mohammad Rasool

• Department of Materials Engineering, Imam Khomeini International University, Qazvin, Iran

autor

Razaghian Ahmad

• Department of Materials Engineering, Imam Khomeini International University, Qazvin, Iran

autor

Mirzadeh Hamed

• School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Iran

• https://orcid.org/0000-0001-7179-0052

autor

Emamy Massoud

• School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Iran

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023)