A Crystallography Study of Bainitic Transformation in a Cu-Zn-Al Alloy

The crystallographic nature of initialisothermal phase transformation in Cu-26Zn-4Al(wt-％) was investigated. The kinetic transforma-tion curve, morphology, crystal structure,substructure, orientation relationship and twinrelationship of bainite plates have been studiedby means of optical and transmission electronmicroscopy. The experimental results showedthat the characteristics of initial 8→bainitetransformation are not exactly consistent withthat found in martensite transformation, forexample, orientation relationship between matrixand bainite does not exist in martensitetransformation.