The effect of cerium additions on dent resistance of Al-0.5Mg-1.2Si-0.25Fe alloy for automotive body sheets

A. R. Daud, Karen M C Wong

    Research output: Contribution to journalArticle

    10 Citations (Scopus)

    Abstract

    Al-0.5Mg-1.2Si-0.25Fe alloy was prepared by casting and subjected to hot and cold rolling. The sheets were solutionized at 540 °C for 30 min, air-quenched to room temperature and naturally aged for 14 days to obtain the T4 temper. Additions of 0.05 to 0.20 wt.% of Ce to the alloy seemed to increase the hardness of the alloy during both a simulated paint-bake cycle and at the peak-hardness conditions. The paint-bake hardness of the Al-0.5Mg-1.2Si-0.25Fe alloy was 76 VHN and increased to 88.9 VHN when 0.20 wt.% of Ce was added to it. In the peak-hardness condition, the hardness of the Al-0.5Mg-1.2Si-0.25Fe alloy was 100.6 VHN and increased to 120 VHN for the alloy containing 0.20 wt.% Ce. The increase in hardness, hence increasing the dent resistance, is related to grain refinement and formation of precipitates.

    Original languageEnglish
    Pages (from-to)2545-2547
    Number of pages3
    JournalMaterials Letters
    Volume58
    Issue number20
    DOIs
    Publication statusPublished - Aug 2004

    Fingerprint

    Cerium
    cerium
    hardness
    Hardness
    paints
    Paint
    cold rolling
    Hot rolling
    Grain refinement
    Cold rolling
    Precipitates
    precipitates
    Casting
    cycles
    air
    room temperature
    Air

    Keywords

    • Dent-resistance
    • Grain refinement
    • Heat treatment
    • Microhardness
    • Microstructure
    • Natural aging

    ASJC Scopus subject areas

    • Materials Science(all)

    Cite this

    The effect of cerium additions on dent resistance of Al-0.5Mg-1.2Si-0.25Fe alloy for automotive body sheets. / Daud, A. R.; Wong, Karen M C.

    In: Materials Letters, Vol. 58, No. 20, 08.2004, p. 2545-2547.

    Research output: Contribution to journalArticle

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    KW - Natural aging

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