Original scientific paper

https://doi.org/10.21278/TOF.42401

Surface Integrity after Turning a Duplex Stainless Steel with Respect to Tool Geometry

Jiří Čapek orcid.org/0000-0002-0695-0619 ; Department of Solid State Engineering, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Prague, Czech Republic
Kamil Kolařík ; Department of Solid State Engineering, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Prague, Czech Republic
Miroslav Neslušan ; Faculty of Mechanical Engineering, University of Žilina, Žilina, Slovak Republic
Zdeněk Pitrmuc ; Department of Machining, Process Planning and Metrology, Faculty of Mechanical Engineering, Czech Technical University in Prague, Prague, Czech Republic
Libor Beránek ; Department of Instrumentation and Control Engineering, Faculty of Mechanical Engineering, Center of Advanced Aerospace Technology, Czech Technical University in Prague, Prague, Czech Republic
Karel Trojan ; Department of Solid State Engineering, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Prague, Czech Republic
Jakub Němeček ; Department of Solid State Engineering, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Prague, Czech Republic
Nikolaj Ganev ; Department of Solid State Engineering, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Prague, Czech Republic
Jiří Kyncl ; Department of Machining, Process Planning and Metrology, Faculty of Mechanical Engineering, Czech Technical University in Prague, Prague, Czech Republic
Petr Mikeš ; Department of Instrumentation and Control Engineering, Faculty of Mechanical Engineering, Center of Advanced Aerospace Technology, Czech Technical University in Prague, Prague, Czech Republic

Abstract

This study deals with surface integrity expressed in terms of stress state as well as microstructure alterations after turning a duplex stainless steel. Residual stresses and the presence of strain-induced martensite are studied as functions of the rake angle. Residual stresses of surface and sub-surface layers were determined by the use of the X-ray diffraction and hole-drilling techniques. X-ray diffraction enables us to distinguish between residual stresses in each phase separately, which is not possible when the hole-drilling method is applied. Furthermore, alterations in the near surface region are also analysed by the use of the magnetic Barkhausen noise and metallographic observation.

Keywords

duplex stainless steels; X-ray diffraction; residual stresses; strain-induced martensite; Barkhausen noise

Hrčak ID:

217493

URI

https://hrcak.srce.hr/217493

Publication date:

11.3.2019.

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