抄録
In connection with Be-Cu alloys containing about 2.2% of Be a number of investigations have already been carried out, but, the results of these investigations are quite at variance. In this research several quenched specimens of the same alloys prepared under various conditions were studied, by measuring the changes in differential dilatation, hardness, microscopic structure and crystalline configulation, which take place in these specimens during tempering.
The aspects of these changes indicated to vary according to the difference in the procedure of casting, working and annealing, to which specimens had previously been subjected, the variation being most noticeable with some of the specimens in their dilatometric change. It is confirmed that the aspect of these changes of the former investigations was essentially the same as one of those found in the present experiment, and that the discrepancy among the results formerly obtained by the different investigators, is chiefly attributed to the historv of the specimens.
