Electron Microscope Study of the Banded β′ Martensite in Cu–Sn Alloy

* This work was carried out partly in (i) Institute of Scientific and Industrial Research, Osaka University, Osaka, Japan and partly in (ii) Tokyo Research Institute, Yawata Iron & Steel Co., Ltd., Kawasaki, Japan. ** Tokyo Research Institute , Yawata Iron & Steel Co., Ltd., Kawasaki, Japan. *** Institute of Scientific and Industrial Research , Osaka University, Osaka, Japan. aluminium alloy and obtained the following results: