Quantitative texture analysis in multiphase materials with overlapping Bragg reflections

Quantitative texture analysis provides information for the understanding of the physical behaviour of materials. Composites consist of at least two phases, which leads to problems in texture investigations. If both phases are crystalline, it may happen that Bragg reflections of the two phases totally or partially overlap. For this case, a program system has been developed using the series expansion method. The texture coefficients of both phases are calculated simultaneously. No line profile analysis is required, and pole figures from overlapping Bragg reflections as well as non-overlapping ones can be used as input data. The degree of overlapping is calculated during the pole figure inversion. The only information needed is which Bragg reflections of different phases may be contained in one pole figure. As an example, the texture analysis of a cold extruded Al-Cu composite specimen is presented, where a partial overlap between the Al(200) and Cu(111) reflections occurs. A comparison is made with texture analysis where the partial overlap is not taken into account. (orig.)