Effect of Thermal Charging of Hydrogen on the Microstructure of Metastable Austenitic Stainless Steel

被引：2

作者：

Kim, Han-Jin ^{[2
,3
]}

Phaniraj, M. P. ^{[1
]}

Kim, Ju-Heon ^{[2
]}

Lee, Young-Su ^{[2
]}

Kim, Dong-Ik ^{[2
]}

Suh, Jin-Yoo ^{[2
]}

Lee, Joonho ^{[3
]}

Shim, Jae-Hyeok ^{[2
]}

Park, Seong-Jun ^{[4
]}

机构：

[1] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151742, South Korea

[2] Korea Inst Sci & Technol, High Temp Energy Mat Res Ctr, Seoul 136791, South Korea

[3] Korea Univ, Dept Mat Sci & Engn, Seoul 136701, South Korea

[4] Korea Inst Mat Sci, Dept Adv Metall Mat, Chang Won 642831, Gyeongnam, South Korea

来源：

STEEL RESEARCH INTERNATIONAL | 2017年 / 88卷 / 02期

关键词：

hydrogen embrittlement; martensitic transformation; ductility and fracture; 304 stainless steel; STRAIN-INDUCED MARTENSITE; INTERNAL HYDROGEN; CRACK-GROWTH; EMBRITTLEMENT; DEFORMATION; 304-STAINLESS-STEEL; TRANSFORMATION; SOLUBILITY; RESISTANCE; BEHAVIOR;

D O I：

10.1002/srin.201600063

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The tensile behavior of hydrogen-charged 304-type austenitic stainless steel, with and without prestrain, is investigated. The specimens are thermally charged with hydrogen in 15MPa hydrogen gas at 300 degrees C for 72h. Tensile behavior of the specimen is compared with the specimen aged in vacuum at 300 degrees C. The effect of the charging condition on the stability of microstructure is determined by characterizing prestrained specimens before and after charging. The hydrogen content in the specimens is determined using thermal desorption spectroscopy (TDS). Analysis of X-ray diffraction (XRD) data and electron backscattered diffraction (EBSD) shows that the fraction of martensite increases after charging in hydrogen by 5-10%. The fracture surfaces of the uncharged and charged specimens are examined for characteristic features. Flow stress and ductility of the charged and prestrained and charged specimens are discussed in terms of the martensite fraction and hydrogen content.

引用

页码：243 / 251

页数：9

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