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نویسندگان مقالات پربازدید :
مواد و طراحی
جزئیات رویداد
اینستاگرام تی پی بین
همایش ، رویداد ، ژورنال
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  • investigation of microstructures and mechanical properties of a356 aluminum alloy produced by expendable pattern shell casting process with vacuum and low pressure

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    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 442
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     in this study, microstructures and mechanical properties of a356 aluminum alloy obtained by expendable pattern shell casting process with vacuum and low pressure (epsc-vl) were investigated. meanwhile, microstructures and mechanical properties of a356 alloy among epsc-vl, expendable pattern shell casting process under gravity casting (epsc-g), lost foam casting with vacuum and low pressure (lfc-vl) and lost foam casting under gravity casting (lfc-g) were compared. the results showed that the microstructure of a356 alloy fabricated by epsc-vl was finer and denser than the products from epsc-g, lfc-g and lfc-vl processes, and its grain size was only 147.2 μm compared to lfc-g (327.1 μm). moreover, its porosity defects were greatly reduced (0.16%) compared to lfc-g (1.97%). the tensile strength, elongation and hardness of castings produced by epsc-vl were all considerably higher than the products from epsc-g, lfc-g and lfc-vl. the a356 alloy made by epsc-vl exhibited morphology of dimple fracture that was very deep and well-distributed. in addition, the castings produced by epsc-vl process had better surface quality compared to lfc castings.

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