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Dynamic shear testing of 2024 T351 aluminium at elevated temperature
Edwards N.J.a,b, Kariem M.A.c, Rashid R.A.R.a,b, Cimpoeru S.J.d, Lu G.a, Ruan D.a,b
a Department of Mechanical and Product Design Engineering, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, 3122, Australia
b Defence Materials Technology Centre, Hawthorn, 3122, Australia
c Mechanical Design Research Group, Faculty of Mechanical and Aerospace Engineering, Bandung Institute of Technology, Bandung, 40132, Indonesia
d Defence Science and Technology Group, Fishermans Bend, 3207, 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]© 2019 Elsevier B.V. 2024-T351 aluminium hat-shaped specimens have been used to experimentally investigate the effect of different initial test temperatures on the strain at which a thermo-plastic instability occurs. A universal testing machine and split Hopkinson pressure bar (SHPB) were used to determine resolved shear stress—nominal plastic shear strain for specimens tested at room temperature, 125 °C and 250 °C, respectively. The shear strain rates was 2 × 10 −3 for quasi-static tests and ranged between 5 × 10 3 to 17.8 × 10 3 s −1 for dynamic tests. Microstructural observations using optical, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) were presented to explain the observed mechanical properties. The flow stress of the 125 °C specimens tested at intermediate and high strain rate (γ˙ > 10 × 10 3 s −1 ) was higher than the flow stress of the room temperature specimens at the same rates. This is believed to be due to different precipitate types, leading to variable strain rate sensitivity as a function of temperature. No quantifiable effect of initial temperature on the strain at which the thermo-plastic instability occurs was identified.[/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]Adiabatic shear band,Elevated temperature,Energy dispersive X ray spectroscopy,High strain rates,Micro-structural observations,Split Hopkinson pressure bars,Strain rate sensitivity,Universal testing machines[/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]Adiabatic shear band,Aluminium 2024,Elevated temperature,High strain rate,Split Hopkinson pressure bar[/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]This paper includes research that was supported by DMTC Limited (Australia). The authors have prepared this paper in accordance with the intellectual property rights granted to partners from the original DMTC project.[/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.2019.03.033[/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]