Estimation of Dislocation Density in Metals from Hardness Measurements
A novel methodology to estimate the dislocation density in cubic metals by using microhardness measurements has been established. The proposed methodology is based on the Indention Size Effect (ISE) phenomena and strengthening mechanisms of materials at the micro-level. The methodology was validated by using experimental data of lean duplex stainless steel 2101 alloy. The results are confirmed via X-ray diffraction measurements and they substantiate that the proposed approach can be used as a general method to estimate dislocation density in metals.
KeywordsHardness Microstructure Dislocations Lean duplex
The authors would like to thank Prof. Sean Cadogan in the School of Physical, Environmental and Mathematical Sciences at The University of New South Wales Canberra for his support in performing X-ray diffraction experiments. Dr. Md. Quadir at Faculty of Science and Engineering, Curtin University is also acknowledged for his help with EBSD measurements. Moreover, the authors are grateful for the support of A/Prof. Jodie Bradby and Mr. Christopher Tanner in the Department of Electronic Materials Engineering in the Research School of Physics and Engineering at the Australian National University in conducting nanoindentation experiments.
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