The deformation behaviour of Ti-25. 53at%Al at 1073K was investigated under the transmission electronmicroscope (TEM). A twinning-like deformation behaviour was observed. Accordins to the structure symine-try under TE...The deformation behaviour of Ti-25. 53at%Al at 1073K was investigated under the transmission electronmicroscope (TEM). A twinning-like deformation behaviour was observed. Accordins to the structure symine-try under TEM the twinning plane should be the prism plane. We believe that the twinnins-like deformationshould be carried out firstly on prism plane in (1120) direction, during which the DO19 structure was destroyed. Then an atom rearranging process would occur, after which the DO19 structure was recovered andtherefore the deformation trace could not be retained. That may be also the main reason that the twinning-likedeformation process was hardly observed previously.展开更多
文摘The deformation behaviour of Ti-25. 53at%Al at 1073K was investigated under the transmission electronmicroscope (TEM). A twinning-like deformation behaviour was observed. Accordins to the structure symine-try under TEM the twinning plane should be the prism plane. We believe that the twinnins-like deformationshould be carried out firstly on prism plane in (1120) direction, during which the DO19 structure was destroyed. Then an atom rearranging process would occur, after which the DO19 structure was recovered andtherefore the deformation trace could not be retained. That may be also the main reason that the twinning-likedeformation process was hardly observed previously.
