2701 圧縮処理によるAl合金ダイカスト内の鋳巣挙動及び鋳巣接合評価(S19-1 アルミニウム合金,マグネシウム合金(1),S19 アルミニウム合金およびマグネシウム合金の創製と加工技術)

概要

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Die-casting tends to generate porosity during the production process. To reduce the porosity, we carried out the compression test of ADC12 aluminum alloy die castings at high temperature and room temperature. To evaluate bonding between the porosity surface, we carried out the tensile test of compressed specimens. To evaluate the deformation behavior of porosity, the nondestructive test was carried out by X-ray CT, and three-dimensional images were obtained from X-ray CT images by using "VOXELCON". From these three-dimensional images, closure of the porosity was occurred and reduction of porosity by compression loading was achieved. However closure of porosity at room temperature was re-opened by tensile test. On the other hand, closure of porosity at high temperature kept closing even after tensile test. This means bonding between the porosity surface was occurred. From these observations, compression process in high temperature has effect to porosity reduction.
社団法人日本機械学会の論文
2007-09-07