Influence of Hydrogen-Charging on Microstructure and Microhardness of High-Nitrogen Austenitic Steel Processed by High-Pressure Torsion

被引：1
|
作者：
Maier, Galina [1 ]
Astafurova, Elena [1 ]
Moskvina, Valentina [1 ]
Melnikov, Eugene [1 ]
Astafurov, Sergey [1 ]
Fortuna, Anastasia [1 ]
Galchenko, Nina [1 ]
Smirnov, Alexander [2 ]
Bataev, Vladimir [2 ]
机构：
[1] RAS, Inst Strength Phys & Mat Sci SB, Tomsk 634055, Russia
[2] Novosibirsk State Tech Univ, Novosibirsk 630073, Russia
来源：
PROCEEDINGS OF THE ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES | 2018年 / 2051卷
关键词：
PHASE-TRANSFORMATIONS; STAINLESS-STEELS; EMBRITTLEMENT;
D O I：
10.1063/1.5083425
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of hydrogen-charging on microstructure and microhardness of a high-nitrogen austenitic Fe- 1 9Cr-21Mn-1.5V-0.3C-0.8N (wt. %) steel processed by high-pressure torsion (HPT) was investigated. X-rays diffraction data indicate that hydrogenation of HPT-deformed specimens leads to an additional broadening of X-rays lines and their shifting, which testify to the formation of the stacking-faults and high residual stresses. Hydrogen-charging of HPT-processed steel promotes to gamma-epsilon martensitic transformation. Due to hydrogen-induced phase hardening, the microhardness of HPT-deformed specimens increases up to 6.8 GPa in hydrogen-charged condition (6.5 GPa in hydrogen-free one). After following exposure of hydrogen-charged specimens for 170 h at air condition, the release of hydrogen atoms occurs, and the X-rays lines shift back to positions corresponded to hydrogen-free HPT-processed specimens.
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页数：5
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