Table of Contents
International Journal of Manufacturing Engineering
Volume 2014, Article ID 921081, 13 pages
Research Article

Experimental Investigation and Multiobjective Optimization of Turning Duplex Stainless Steels

1Institute for Machine Tools, University of Stuttgart, Holzgartenstraße 17, 70174 Stuttgart, Germany
2IMWF, University of Stuttgart, Pfaffenwaldring 32, 70569 Stuttgart, Germany

Received 6 September 2014; Accepted 10 November 2014; Published 3 December 2014

Academic Editor: Godfrey C. Onwubolu

Copyright © 2014 Rastee D. Koyee et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper addresses experimental investigations of turning EN 1.4462 and EN 1.4410 duplex stainless steel grades with multilayer coated carbide inserts. Single-point wet and dry longitudinal turning tests of cylindrical bars are conducted; cutting forces, effective cutting powers, and tool wear are measured. The parametric influences of cutting speed, feed rate, and process conditions on the cutting performances such as resultant cutting force, specific effective cutting power, and flank wear are analyzed and proper conclusions are drawn. Nature-inspired metaheuristic bat algorithm is employed to handle the multiobjective optimization of the conflicting performances. Finally, the optimum cutting condition for each process condition can be selected from calculated Pareto optimal fronts by the user according to the planning requirements.