GAS CONTENT AND HOT SHORTNESS IN ALUMINUM ALLOYS

The hot shortness of aluminum alloys and the effects of hydrogen on it were studied at temperatures up to 850 C in an alloy containing 3% magnesium. The results showed that the brittleness increased with increasing temperatures. The crack length in alloys containing hydrogen was approximately 10 mm less than in those containing no hydrogen. The experimental procedure is described. (J.S.R.)