Triaxial analysis of residual stress in surface layers after high feed machining using X-ray diffractometer

¹ Department of Machining and Manufacturing Technology, University of Zilina, Univerzitna 1, 010 26 Zilina
² Department of Machining, Assembly and Engineering Metrology, Technical University of Ostrava, 17. Listopadu 15/2172, 708 33 Ostrava - Poruba

^* Corresponding author: michal.sajgalik@fstroj.uniza.sk

Abstract

Continuously increasing of productivity is main cause of finding of new ways and methods of machining. High feed machining (HFM) is one of methods of high-productivity machining developed to achieve higher metal removal rates and decrease machining time. Each machining or treatment operation introduces residual stress into the material and its surface layers. Roughing methods of machining generate tensile residual stress obviously. Tensile character of residual stress is not suitable for functional properties of produced parts. In some cases, finishing methods of machining can improve residual stress to suitable character. New detection method of residual stress by applying of x-ray diffraction allows to measure residual stress as triaxial tensor and distribution of residual stress. When we know analyse the residual stress thoroughly, we can design right finishing method and so improve the character of residual stress. This article is focused on analysing given measuring method of residual stress in triaxial direction and next possibilities of their eventual improvement.