An interactive program for crystal orientation and martensitic transformation investigations: COATI

An interactive program for comparison of experimental with theoretical martensitic transformation data and for orientation determination from Laue and zero-layer reciprocal-lattice photographs is described. The program can generate orthographic, gnomonic, Laue and zero-layer reciprocal-lattice projections of lattice vectors, circles and latitude-longitude nets. A utility for habit-plane calculation from surface trace data and its diagrammatical representation is provided. Drawings before and after transformation can be superimposed. Output from program MRTNST [Ledbetter & Wayman (1971). Mater. Sci. Eng. 7, 151-157] (altered to handle triclinic lattices) can be read directly by COATI, which also facilitates the graphical method of martensitic calculations. A lucid command language allows easy manipulation of previously complex procedures.