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High strain rate deformation of ARMOX 500T and effects on texture development using neutron diffraction techniques and SHPB testing
Saleh M.a,e, Kariem M.M.b, Luzin V.a, Toppler K.f, Li H.d,e, Ruan D.c,e
a Australian Nuclear Science and Technology Organisation (ANSTO), Kirrawee DC, 2232, Australia
b Faculty of Mechanical and Aerospace Engineering, Bandung Institute of Technology, Bandung, 40132, Indonesia
c Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, 3122, Australia
d School of Mechanical Materials, Mechatronics Engineering, Faculty of Engineering and Information Sciences, University of Wollongong, Wollongong, 2500, Australia
e Defence Materials Technology Centre (DMTC) Level 2, Hawthorn, 3122, Australia
f School of Materials Science and Engineering, University of New South Wales, 2052, Australia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2017The authors evaluated the crystallographic texture, defined as the distribution of orientation of crystals (or grains), to gauge the deformation and microstructural evolution of ARMOX 500T armour plates at elevated strain rates. Using neutron diffraction, the authors examined a number of specimens deformed at room temperature and high strain rates and contrasted these with equivalent samples deformed quasi-statically. Since crystallographic texture can play a part in the armour’s ballistic response the authors were able to observe a rate dependent textural development, with the strengthening of the rolling α-fibre. The hot rolling process used in the manufacture of these steels leads to a through thickness texture variation that leads to an asymmetric transitional texture in the strain regime (1–2%) but with increased strain a symmetric texture develops irrespective of the strain rate, albeit with different intensities. By extending the testing program the authors were also able to deduce the strength parameters for the Johnson-Cook model through split Hopkinson pressure bar testing at high strain rates (1000–3000 s−1) and elevated temperatures (20–600 °C). The results, when compared with existing literature, show deviations in the strain rate sensitives of the tested specimens and, subsequently, variations in the computed flow stress parameters.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Armour,Crystallographic textures,Elevated temperature,High strain rate deformation,Johnson-Cook,Neutron diffraction technique,SHPB,Split Hopkinson pressure bars[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Armour,Johnson-Cook,Neutron-diffraction,SHPB,Texture[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]R Smith and D Shanmugam from THALES Protected Vehicles for the supply of the ARMOX 500T plate. J Davis, T Palmer and K Lu from NMDC, ANSTO for microscopy images and sample preparation. The authors gratefully thank R Robinson for his director’s discretionary beam time allocation (proposal DB3365) on the KOWARI strain scanner at ANSTO and L Edwards for useful discussions. The authors acknowledge J Sandlin (Armour program manager) and the support and funding of the Defence Materials Technology Centre (DMTC) for Armour Program 3. The DMTC was established and is supported under the Australian Government’s Defence Future Capability Technology Centres Program[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1016/j.msea.2017.09.022[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]