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.

引用

页数：5

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