摘要

A method of trace analysis, the double edge-on one, is described and used to accurately determine the habit plane and interface of lath-shaped or plate-like transformation products including Widmansttaten precipitate, lath martensite and bainite plate. The results of measurements for four alloys and steels are presented; and the measured habit plane and interface were found in most cases in excellent agreement with the predictions from the relevant crystallographic theories of phase transformations.