Impact Toughness and Dynamic Compression of Ultrafine-Grained Pure Copper Produced by Equal-Channel Angular Pressing. / Smirnov, Ivan; Konstantinov, Alexander.
EIGHTH POLYAKHOV'S READING. ed. / E Kustova; G Leonov; N Morosov; M Yushkov; M Mekhonoshina. American Institute of Physics, 2018. (AIP Conference Proceedings; Vol. 1959).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
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TY - GEN
T1 - Impact Toughness and Dynamic Compression of Ultrafine-Grained Pure Copper Produced by Equal-Channel Angular Pressing
AU - Smirnov, Ivan
AU - Konstantinov, Alexander
N1 - Conference code: 8
PY - 2018
Y1 - 2018
N2 - This work presents studies the effect of ultrafine-grained (UFG) structure on Impact toughness and dynamic compression of pure copper MI (99.9%). The UFG structure was provided by means of equal-channel angular pressing (ECAP) on the Conform scheme with four and eight passes. Impact toughness tests on samples with U-shaped notch were performed using a drop weight impact machine. Dynamic compression test of cylindrical samples were performed with a setup with the Split-Elopkinson pressure bar (SHPB-20) by the Kolsky method. The results showed that the impact toughness of the UFG copper states was not less than that of the coarse-grained (CG) counterpart. Moreover, the fracture process of the UEG material requires more energy. An increase of compression strain rate by 6 orders resulted in the well-known strain-rate dependence of the yield strength for the CG material and the UFG material after eight ECAP passes. The yield strength of the material after four ECAP passes remained at the level corresponding to a quasi-static loading.
AB - This work presents studies the effect of ultrafine-grained (UFG) structure on Impact toughness and dynamic compression of pure copper MI (99.9%). The UFG structure was provided by means of equal-channel angular pressing (ECAP) on the Conform scheme with four and eight passes. Impact toughness tests on samples with U-shaped notch were performed using a drop weight impact machine. Dynamic compression test of cylindrical samples were performed with a setup with the Split-Elopkinson pressure bar (SHPB-20) by the Kolsky method. The results showed that the impact toughness of the UFG copper states was not less than that of the coarse-grained (CG) counterpart. Moreover, the fracture process of the UEG material requires more energy. An increase of compression strain rate by 6 orders resulted in the well-known strain-rate dependence of the yield strength for the CG material and the UFG material after eight ECAP passes. The yield strength of the material after four ECAP passes remained at the level corresponding to a quasi-static loading.
KW - STRAIN-RATE
KW - NANOCRYSTALLINE MATERIALS
KW - TEMPERATURE
KW - STRENGTH
U2 - 10.1063/1.5034708
DO - 10.1063/1.5034708
M3 - статья в сборнике материалов конференции
T3 - AIP Conference Proceedings
BT - EIGHTH POLYAKHOV'S READING
A2 - Kustova, E
A2 - Leonov, G
A2 - Morosov, N
A2 - Yushkov, M
A2 - Mekhonoshina, M
PB - American Institute of Physics
Y2 - 29 January 2018 through 2 February 2018
ER -
ID: 39115936