Effect of thermal charging of hydrogen on the microstructure of metastable austenitic stainless steel

Title
Effect of thermal charging of hydrogen on the microstructure of metastable austenitic stainless steel
Authors
서진유심재혁김동익이영수김한진M.P. Phaniraj김주헌이준호박성준
Issue Date
2017-02
Publisher
STEEL RESEARCH INTERNATIONAL
Citation
VOL 88, NO 2-1600063-9
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.
URI
http://pubs.kist.re.kr/handle/201004/69667
ISSN
1611-3683
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KIST Publication > Article
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