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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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铝合金压铸件微观孔洞三维特征及分布的研究
DOI: 10.3724/SP.J.1037.2012.00553, PP. 284-290
Keywords: 铝合金,压铸,微观孔洞,三维X射线断层扫描
Abstract:
基于高精度三维X射线断层扫描技术,对实际ADC12铝合金压铸件试样内部的微观孔洞进行了观察,测量和计算了孔洞的体积、表面积、圆整度等特征参数,分析了微观孔洞体积的总体特征.根据孔洞的三维形貌和特征参数,对气孔、气缩孔和缩孔3类微观孔洞的体积、圆整度和压力进行了分析与对比,探讨了各类孔洞的形成机制.研究表明,气孔、气缩孔和缩孔空间形貌复杂性增加,而圆整度和压力下降,气缩孔具有最大的平均体积,缩孔具有最小的平均体积.使用统计方法对微观孔洞的体积进行了分析,结果表明,微观孔洞的体积符合三参数对数正态分布,其拟合程度优于二参数对数正态分布.
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