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jwri34_02_063
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論文情報
タイトル
Role of Sigma Phase on Hydrogen Embrittlement of Super Duplex Stainless Steels
著者
Ikeuchi, Kenji
Ikeuchi, Kenji
キーワード等
Duplex stainless steel
Hydrogen Embrittlement
Corrosion
Microstructure
Sigma phase
Secondary austenite
Fractography
抄録
The role of sigma phase on corrosion and hydrogen embrittlement of super duplex stainless steels was investigated by using corrosion tests, transmission electron microscopy (TEM) and fractography. The materials used were type 329J1, SAF2205 and SAF2507 duplex stainless steels. The specimens were heated at 923K to 1223K in order to investigate the precipitation of sigma phase (Fe-Cr-Mo compound). The evaluation of corrosion was made using a 10% oxalic acid test (ASTM A262A) and Strauss test (ASTM A262E). Hydrogenation of the specimens was achieved by cathodic charging in a 5%H₂SO₄ solution and the hydrogen embrittlement was evaluated using slow strain rate testing (SSRT). The duplex stainless steels consist of ferrite and austenite microstructure. The secondary austenite was preferentially corroded but the sigma phase was hardly corroded by using ASTM A-262A and A262E tests. The sigma phase enhanced hydrogen embrittlement. The fracture morphology showed that the fracture facet size was related to the sigma phase precipitated around austenite. The crack due to hydrogen embrittlement occurred and propagated at the sigma-ferrite interface on the basis of the 3-D reconstruction system of fractography.
公開者
大阪大学接合科学研究所
公開者の別表記
Joining and Welding Research Institute, Osaka University
公開者 (ヨミ)
オオサカ ダイガク セツゴウ カガク ケンキュウジョ
掲載誌名
Transactions of JWRI
巻
34
号
2
開始ページ
63
終了ページ
68
刊行年月
2005-12
ISSN
03874508
NCID
AA00867058
URL
http://hdl.handle.net/11094/11360
言語
英語
カテゴリ
紀要論文 Departmental Bulletin Paper
Transactions of JWRI / Vol.34 No.2 (2005-12)
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DCTERMS.bibliographicCitation
Transactions of JWRI.34(2) P.63-P.68
DC.title
Role of Sigma Phase on Hydrogen Embrittlement of Super Duplex Stainless Steels
DC.creator
Ikeuchi, Kenji
DC.publisher
大阪大学接合科学研究所
DC.language" scheme="DCTERMS.RFC1766
英語
DCTERMS.issued" scheme="DCTERMS.W3CDTF
2005-12
DC.identifier" scheme="DCTERMS.URI
http://hdl.handle.net/11094/11360
DC.subject
Duplex stainless steel
Hydrogen Embrittlement
Corrosion
Microstructure
Sigma phase
Secondary austenite
Fractography
DCTERMS.abstract
The role of sigma phase on corrosion and hydrogen embrittlement of super duplex stainless steels was investigated by using corrosion tests, transmission electron microscopy (TEM) and fractography. The materials used were type 329J1, SAF2205 and SAF2507 duplex stainless steels. The specimens were heated at 923K to 1223K in order to investigate the precipitation of sigma phase (Fe-Cr-Mo compound). The evaluation of corrosion was made using a 10% oxalic acid test (ASTM A262A) and Strauss test (ASTM A262E). Hydrogenation of the specimens was achieved by cathodic charging in a 5%H₂SO₄ solution and the hydrogen embrittlement was evaluated using slow strain rate testing (SSRT). The duplex stainless steels consist of ferrite and austenite microstructure. The secondary austenite was preferentially corroded but the sigma phase was hardly corroded by using ASTM A-262A and A262E tests. The sigma phase enhanced hydrogen embrittlement. The fracture morphology showed that the fracture facet size was related to the sigma phase precipitated around austenite. The crack due to hydrogen embrittlement occurred and propagated at the sigma-ferrite interface on the basis of the 3-D reconstruction system of fractography.
citation_title
Role of Sigma Phase on Hydrogen Embrittlement of Super Duplex Stainless Steels
citation_author
Ikeuchi, Kenji
citation_publisher
大阪大学接合科学研究所
citation_language
英語
citation_date
2005-12
citation_journal_title
Transactions of JWRI
citation_volume
34
citation_issue
2
citation_firstpage
63
citation_lastpage
68
citation_issn
03874508
citation_public_url
http://hdl.handle.net/11094/11360
citation_keywords
Duplex stainless steel
Hydrogen Embrittlement
Corrosion
Microstructure
Sigma phase
Secondary austenite
Fractography