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Acta Metall Sin  1978, Vol. 14 Issue (3): 246-329    DOI:
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AN OBSERVATION OF UNHEALED POROSITIES AND CRYSTALLINE STEPS IN ALUMINIUM ALLOY FORGINGS
Zhou Jing Chang Xin Guo Ke-xin (Kuo Ke-hsin)(Institute of Metal Research; Academia Sinica)
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Zhou Jing Chang Xin Guo Ke-xin (Kuo Ke-hsin)(Institute of Metal Research; Academia Sinica). AN OBSERVATION OF UNHEALED POROSITIES AND CRYSTALLINE STEPS IN ALUMINIUM ALLOY FORGINGS. Acta Metall Sin, 1978, 14(3): 246-329.

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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.
Received:  18 March 1978     
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