Al-Al₂O₃合金熱間圧延板の深絞りについて

抄録

For the purpose of investigating the drawability of S.A.P., hot-rolled Al-Al₂O₃ alloys containing Al₂O₃ from 1.2 to 15.5 wt% were deep drawn at high and room temperatures. As to the maximum deep drawability, the limiting drawing ratio of 2.10 was obtained on Al-3.5%Al₂O₃ alloy. The cup profile obtained on Al-Al₂O₃ (3.5%) alloy showed 50° ears from the rolling direction. The ears disappeared at over 9.8 wt%Al₂O₃, and the new ears pararell to the rolling direction were formed. The pole figures of Al-Al₂O₃ alloys with 3.5 wt%Al₂O₃ showed that the preferred orientation is (110)[\bar335], and the relation between the ears and pole figures are discussed. The mechanism of forming the (110)[\bar335] texture seemed to be due to the operation of a new slip system other than the primary and conjugate slip systems. It appears that the new slip system has the same slip plane as the primary or the conjugate slip plane and its slip direction is equal to the crossing line between the primary and conjugate slip planes.