Manufacturing Technology 2020, 20(1):72-77 | DOI: 10.21062/mft.2020.007

Microstructural analysis of examined 33NiCrMoV15 steel and investigation of its nanome-chanical properties after machining

Jozef Majerík1,, Igor Barényi1,, Josef Sedlák2,, Roman Kusenda1,, Maroą Eckert1
1 Faculty of special technology, Alexander Dubcek University of Trencin. Pri Parku 19, 911 06 Trenčín. Slovak Republic
2 Institute of manufacturing technology, Faculty of mechanical engineering, Brno University of Technology. Technická 2896/2, 616 69 Brno. Czech Republic

The authors presented paper deals with experimental measurement and evaluation of nanomechanical properties of hard turned and grinded surfaces on the cross section specimens made of the 33NiCrMoV15 steel. 33NiCrMoV15 steel was selected to perform for all realized investigations. Even before the start of the experi-ments that investigated the effect of hard finish turning against grinding, it was necessary to subject the investi-gated 33NiCrMoV15 steel to basic research with regard to its chemical composition, fundamental microstructure and basic mechanical properties. The microstructure was performed on Neophot 32 optical microscope. Chemical composition was realized on the spectral analyzer Spectrolab Jr CCD. Mechanical properties, like nanohardness H and reduced Young modulus Er were subsequently performed on the Hysitron TI950 Triboindenter with a Cube Corner measuring tip, and evaluated by software Triboscan. Based on the acquired values, a 2D nanostructure of the distribution map of s H and Er was then evaluated in Matlab. This scientific research, together with all measured and calculated values, is the fundamental that will help to optimizing the quality and used all these results to optimize presented material and technological processes in term of surface integrity.

Keywords: Quasistatic nanoindentation, Nanohardness, Hard finish turning, Grinding, Microstructural analysis
Grants and funding:

Slovak Research and Development Agency under contract No. APVV-15-0710.
Brno University of Technology, Faculty of Mechanical Engineering, Specific research 2019, with the grant " Research of perspective production technologies ", FSI-S-19-6014.

Prepublished online: July 31, 2020; Published: August 6, 2020  Show citation

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Majerík J, Barényi I, Sedlák J, Kusenda R, Eckert M. Microstructural analysis of examined 33NiCrMoV15 steel and investigation of its nanome-chanical properties after machining. Manufacturing Technology. 2020;20(1):72-77. doi: 10.21062/mft.2020.007.
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