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    Optimising grey iron powder compacts

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    Date
    2009
    Type
    Article
    Author
    Borgström, Henrik
    Nyborg, Lars
    Khraisat, Walid
    Abu Jadayil, Wisam
    Metadata
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    Abstract
    The grey iron microstructure Fe–2C–2Si powder based compact is tailored by different kinds of in situ and post sintering processing. This has been achieved by combining thermodynamic and kinetics modelling of microstructure development with sintering and controlled heat treatment experiments of tensile test specimens die compacted at 600 MPa. Applying optimised sintering conditions led to a grey iron like microstructure with 95% relative sintered density. Sinter hardening the compacts led to 500 MPa in yield strength and 600 MPa in ultimate tensile strength in combination with ductile fracture. Quenched and tempered condition showed the same strength values, but combined with brittle fracture due to martensitic structure. Pore rounding and partial pore filling by graphite were obtained by austenising isothermal hold during the cooling of the sintering cycle.
    URI
    https://dspace.adu.ac.ae/handle/1/3839
    DOI
    https://doi.org/10.1179/003258908X370168
    Citation
    Khraisat, W., Borgström, H., Nyborg, L., & Jadayil, W. A. A. (2009). Optimising grey iron powder compacts. Powder metallurgy, 52(4), 291-297.
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