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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/27083


    Title: SUPERPLASTIC FORMING OF AN AL-LI-CU-MG-ZR ALLOY USING VARIOUS FORMING PATHS
    Authors: WU,HY;CHERN,JT;LEE,S
    Contributors: 機械工程研究所
    Keywords: ENHANCED GRAIN-GROWTH;DEFORMATION
    Date: 1995
    Issue Date: 2010-06-29 18:07:18 (UTC+8)
    Publisher: 中央大學
    Abstract: A series of experiments were performed by use of various forming paths during superplastic forming of an el-Li based alloy. A fully recrystallized Al-Li-Cu-Mg-Zr alloy could be formed superplastically using paths of either a constant or a variable strain rate. The distribution of thickness along-the formed sheet was confirmed by the results as being not much sensitive to the forming paths. The uniformity of the formed part affected the microstructural characteristics; the grain size was larger in regions at which the plastic deformation was larger, an effect was believed due to strain-induced grain growth. Static growth of grain showed little effect on an Al-Li based alloy during superplastic forming. The strain-induced grain growth influenced the distribution of grain size, resulting in cavitation occurring in the regions of large grain size. A two-step variable forming path could reduce cavitation in the formed part.
    Relation: MATERIALS AND MANUFACTURING PROCESSES
    Appears in Collections:[機械工程研究所] 期刊論文

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