Open circle of currently approx. 35 persons working in the field of metallography / materials testing in the Aachen area. The Working Group meets two to three times a year in the afternoon at the company or institute of a member of the Working Group. This person gives a lecture on the work carried out on one or more projects following his or her area of responsibility. This is followed by an informal exchange of experiences. Besides, a regulars' table is held once a year in a beer garden after work, and a visit to the Aachen Christmas market is organized at Christmas time.