AN OBSERVATION OF UNHEALED POROSITIES AND CRYSTALLINE STEPS IN ALUMINIUM ALLOY FORGINGS |
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| Authors: | Zhou Jing Chang Xin Guo Ke-xin |
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| Affiliation: | Zhou Jing Chang Xin Guo Ke-xin (Kuo Ke-hsin)(Institute of Metal Research,Academia Sinica) |
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| Abstract: | Unhealed porosities and free surface of dendrites with crystalline steps were occasionally observed in aluminium alloy forgings. It was found that the dendrites grow preferentially along <100> directions and the crystalline steps belong mainly to {100} and {110} planes.In the neighbourhood of the unhealed porosities the alloy matrix appeared to be embrittled and in certain cases cleavage fracture was observed. |
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