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

Han Jin Kim; M. P. Phaniraj; Ju Heon Kim; Young Su Lee; Dong Ik Kim; Jin Yoo Suh; Joonho Lee; Jae Hyeok Shim; Seong Jun Park

doi:10.1002/srin.201600063

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

Han Jin Kim, M. P. Phaniraj, Ju Heon Kim, Young Su Lee, Dong Ik Kim, Jin Yoo Suh, Joonho Lee, Jae Hyeok Shim, Seong Jun Park

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

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 15 MPa hydrogen gas at 300 °C for 72 h. Tensile behavior of the specimen is compared with the specimen aged in vacuum at 300 °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.

Original language	English
Pages (from-to)	243-251
Number of pages	9
Journal	Steel Research International
Volume	88
Issue number	2
DOIs	https://doi.org/10.1002/srin.201600063
Publication status	Published - 2017 Feb 1

Keywords

304 stainless steel
ductility and fracture
hydrogen embrittlement
martensitic transformation

ASJC Scopus subject areas

Condensed Matter Physics
Physical and Theoretical Chemistry
Metals and Alloys
Materials Chemistry

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Effect of Thermal Charging of Hydrogen on the Microstructure of Metastable Austenitic Stainless Steel. / Kim, Han Jin; Phaniraj, M. P.; Kim, Ju Heon; Lee, Young Su; Kim, Dong Ik; Suh, Jin Yoo; Lee, Joonho; Shim, Jae Hyeok; Park, Seong Jun.

In: Steel Research International, Vol. 88, No. 2, 01.02.2017, p. 243-251.

Research output: Contribution to journal › Article › peer-review

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abstract = "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 15 MPa hydrogen gas at 300 °C for 72 h. Tensile behavior of the specimen is compared with the specimen aged in vacuum at 300 °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.",

keywords = "304 stainless steel, ductility and fracture, hydrogen embrittlement, martensitic transformation",

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AU - Kim, Han Jin

AU - Phaniraj, M. P.

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AU - Lee, Young Su

AU - Kim, Dong Ik

AU - Suh, Jin Yoo

AU - Lee, Joonho

AU - Shim, Jae Hyeok

AU - Park, Seong Jun

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N2 - 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 15 MPa hydrogen gas at 300 °C for 72 h. Tensile behavior of the specimen is compared with the specimen aged in vacuum at 300 °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.

AB - 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 15 MPa hydrogen gas at 300 °C for 72 h. Tensile behavior of the specimen is compared with the specimen aged in vacuum at 300 °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.

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