Effect of crystallographic orientations of grains on the global mechanical properties of steel sheets by depth sensing indentation

2nd International Conference on Rheology and Modeling of Materials

Burik, P.^1 ; Pesek, L.^2 ; Kejzlar, P.^3 ; Andrsova, Z.^3 ; Zubko, P.^2

Technical University of Liberec, Faculty of Mechanical Engineering, Department of Material Science, Liberec, Czech Republic^1

Technical University of Kosice, Faculty of Metallurgy, Department of Materials Science, Kosice, Slovakia^2

Technical University of Liberec, Institute for Nanomaterials, Advanced Technology and Innovation, Liberec, Czech Republic^3

关键词: Crystallographic orientations;    Depth sensing indentation;    Experimental investigations;    Indentation hardness;    Local mechanical properties;    Microstructure and mechanical properties;    Multiphase materials;    Nanomechanical testing;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/790/1/012003/pdf
DOI  :  10.1088/1742-6596/790/1/012003

来源: IOP

【 摘 要 】

The main idea of this work is using a physical model to prepare a virtual material with required properties. The model is based on the relationship between the microstructure and mechanical properties. The macroscopic (global) mechanical properties of steel are highly dependent upon microstructure, crystallographic orientation of grains, distribution of each phase present, etc. We need to know the local mechanical properties of each phase separately in multiphase materials. The grain size is a scale, where local mechanical properties are responsible for the behavior. Nanomechanical testing using depth sensing indentation (DSI) provides a straightforward solution for quantitatively characterizing each of phases in microstructure because it is very powerful technique for characterization of materials in small volumes. The aim of this experimental investigation is: (i) to prove how the mixing rule works for local mechanical properties (indentation hardness HIT) in microstructure scale using the DSI technique on steel sheets with different microstructure; (ii) to compare measured global properties with properties achieved by mixing rule; (iii) to analyze the effect of crystallographic orientations of grains on the mixing rule.