The effect of high-pressure torsion on microstructure and strength properties of high-nitrogen austenitic steel

被引：3
|
作者：
Astafurova, E. G. [1 ,2 ]
Tukeeva, M. S. [1 ]
Moskvina, V. A. [3 ]
Galchenko, N. K. [1 ]
Bataev, I. A. [4 ]
Bataev, V. A. [4 ]
机构：
[1] RAS, Inst Strength Phys & Mat Sci SB, 2-4 Akad Sky Ave, Tomsk 634055, Russia
[2] Nat Res Tomsk State Univ, Tomsk 634050, Russia
[3] Nat Res Tomsk Polytech Univ, Tomsk 634050, Russia
[4] Novosibirsk State Tech Univ, Novosibirsk 630073, Russia
来源：
LETTERS ON MATERIALS-PIS MA O MATERIALAKH | 2014年 / 4卷 / 04期
关键词：
high-pressure torsion; high-nitrogen steel; twinning; particle strengthening; austenite;
D O I：
10.22226/2410-3535-2014-4-269-272
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, we investigate the microstructure and microhardness of high-nitrogen austenitic steel after high-pressure upset and high-pressure torsion (6 GPa) at room temperature. As the result of deformation, steel microhardness increases by 1.5 times after high-pressure torsion per one revolution while the distribution of microhardness is quasi-homogeneous across the disks. The level of solid solution hardening of steel remains high after deformation processing, and the main mechanisms determining fragmentation of the steel structure are slip, twinning, formation of localized deformation microbands, and precipitation hardening.
引用
收藏
页码：269 / 272
页数：4
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