Machining of functional graded workpieces

Biermann, D.1, a; Zabel, A.1, b; Grünert, S.1, c; Sieben, B.1, d

Institut für Spanende Fertigung, Technische Universität Dortmund, Baroper Str. 303, 44227 Dortmund

a); b); c); d)


Increasing diversity in industrial requirements in practice needs parts or components with custom-designed material properties. Functional graded workpieces represent a new approach for achieving this goal. With the help of a thermomechanically coupled forming process, it is now possible to produce functional graded axi-symmetric components consisting of heat-treated steel and to regulate the different values of hardness as per the requirement. The machining of such functional graded components is a very challenging task owing to the difference in their hardness along the length and e. g. the radius of the shaft. Usually, the cutting tool material is selected based on the characteristics of the workpiece material. In order to machine a workpiece with varying material properties with only one cutting tool, a compromise regarding cutting tool material and geometry has to be determined. In this research, recent results of turning and drilling of functional graded workpieces are presented.


Functional graded workpiece, turning, drilling, combined machining of hard and soft workpiece zones


In: Proceedings of the 3rd CIRP International Conference High Performance Cutting (HPC), 12.6.-13.6. 2008, Dublin, Irland, Byrne, G.; O'Donnel, G. (Hrsg.), ISBN 978-1-905254-32-3, S. 723-732