Microhardness Homogeneity and Microstructure of High-Nitrogen Austenitic Steel Processed by High-Pressure Torsion
| Parent link: | AIP Conference Proceedings Vol. 1909 : Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2017 (AMHS’17).— 2017.— [020129, 4 p.] |
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| Other Authors: | , , , , , , |
| Summary: | Title screen The authors investigate microhardness homogeneity and microstructure of the high-nitrogen austenitic steel Fe-23Cr-19Mn-0.2C-0.5N (wt %) subjected to high-pressure torsion. High-pressure torsion causes a significant increase in the microhardness of steel from 300 HV in the initial state up to 600 HV after torsion for one full revolution. Experimental results reveal a homogeneous distribution of microhardness values across the discs after deformation for N=1/4 revolution. The control of the top and bottom surfaces of steel specimens shows that microhardness radial distributions are independent of the side of the specimens (position of a moving plunger during plastic deformation). Under high-pressure torsion, the spacings between twin boundaries decrease, while the dislocation density increases. The formation of a twin net in high-nitrogen steel in high-pressure torsion for N=1/4-1 revolutions provides a homogeneous distribution of microhardness across the discs under torsion. Режим доступа: по договору с организацией-держателем ресурса |
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2017
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| Online Access: | https://doi.org/10.1063/1.5013810 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=657147 |
| Summary: | Title screen The authors investigate microhardness homogeneity and microstructure of the high-nitrogen austenitic steel Fe-23Cr-19Mn-0.2C-0.5N (wt %) subjected to high-pressure torsion. High-pressure torsion causes a significant increase in the microhardness of steel from 300 HV in the initial state up to 600 HV after torsion for one full revolution. Experimental results reveal a homogeneous distribution of microhardness values across the discs after deformation for N=1/4 revolution. The control of the top and bottom surfaces of steel specimens shows that microhardness radial distributions are independent of the side of the specimens (position of a moving plunger during plastic deformation). Under high-pressure torsion, the spacings between twin boundaries decrease, while the dislocation density increases. The formation of a twin net in high-nitrogen steel in high-pressure torsion for N=1/4-1 revolutions provides a homogeneous distribution of microhardness across the discs under torsion. Режим доступа: по договору с организацией-держателем ресурса |
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| DOI: | 10.1063/1.5013810 |