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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50198


    Title: Anodisation of friction stir welds in AA 5052-O alloy
    Authors: Shih,TS;Jhou,YJ;Wang,JW;Hwang,LR
    Contributors: 機械工程學系
    Keywords: ALUMINUM-ALLOY;NUGGET ZONE;MODEL
    Date: 2011
    Issue Date: 2012-03-27 17:06:14 (UTC+8)
    Publisher: 國立中央大學
    Abstract: An AA 5052-O alloy was used as the base metal for friction stir welding (FSW). The heat and maximum temperature developed in the matrix of the sample during FSW were computed. Optical observations showed grey strips that appeared on the surface of the sample after anodisation. These grey strips could be attributed to the emergence of a thermomechanically affected zone (TMAZ) from the bulk friction stir welded sample. Mg solubility in the TMAZ increased when Mg(2)Si particles that inherently existed in the matrix of the AA 5052-O alloy dissolved after being subjected to the maximum temperature. In addition, the TMAZ was also subjected to shear stress. Plastic deformation increased the dislocation density. The combined effects of the increased dislocation density and enriched Mg content led to a change in the corrosion resistance and anodic behaviour of this zone.
    Relation: SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
    Appears in Collections:[機械工程學系] 期刊論文

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