Microstructural Characterisation of a High Strength Steel Subjected to Localised Blast Loading
The blast response of a High Strength Steel (HSS), classified as a High Hardness Armour (HHA), subjected to a 60 g charge mass at a Stand-Off Distance (SOD) of 25 mm has been investigated. Electron Backscatter Diffraction (EBSD) and microhardness measurements were used to determine the microstructural evolution in the through thickness and the associated mechanical properties changes. Results show that the blast wave travelling through the material increased the deformation and reduced the grain size. These observations correlated with the hardness increasing along the direction of travel of the blast wave.
KeywordsArmour steels Blast testing Microstructural evolution
This work was supported by DST-G Melbourne. The authors would like to thank the UNSW Canberra Technical Support Group (TSG) for their assistance in sample preparation and testing. Acknowledgment also goes to Curtin University Microscopy and Microanalysis Facility for their assistance with EBSD.
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