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PROCEEDINGS OF THE FIFTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING
Edited by: J. Kruis, Y. Tsompanakis and B.H.V. Topping
Model of the Relationship between Local and Global Mechanical Properties of Individual Microstructure Components in Steel Sheets Based on Depth Sensing Indentation Measurement
P. Burik1 and L. Pešek2
1Faculty of Mechanical Engineering, Technical University of Liberec, Czech Republic
, "Model of the Relationship between Local and Global Mechanical Properties of Individual Microstructure Components in Steel Sheets Based on Depth Sensing Indentation Measurement", in J. Kruis, Y. Tsompanakis, B.H.V. Topping, (Editors), "Proceedings of the Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 147, 2015. doi:10.4203/ccp.108.147
Keywords: mixture rule, depth sensing indentation, steel sheets, ferrite, pearlite, martensite.
The main idea of the work, described in this paper, is using a physical model to prepare a virtual material with the 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. The local mechanical properties of each phase must be known separately in multiphase materials. The grain size is a scale, where local mechanical properties are responsible for the behaviour. Nanomechanical testing using depth sensing indentation provides a straightforward solution for quantitatively characterizing each of the phases in microstructure because it is very powerful technique for characterization of materials in small volumes. Measuring the local properties (indentation hardness, Young's modulus, indentation energy: total elastic work, and plastic energy) of each microstructure component separately in multiphase materials gives information that is valuable for the development of new materials and for modeling.
The aim of this experimental investigation is to prove how the mixture rule works for local mechanical properties at the microstructure scale using the depth sensing indentation technique on steel sheets with different microstructure and to compare measured properties with properties achieved by the mixture rule.
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