An advanced creep cavitation resistance Cu-containing 18Cr–12Ni–Nb austenitic stainless steel

Extensive creep cavitation precluded the beneficial effect of Cu addition on long-term creep rupture strength of 18Cr–12Ni–Nb (type 347) austenitic stainless steel. Microalloying with B and Ce suppressed creep cavitation to increase its creep rupture strength and ductility. Boron segregation on nucl...

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Bibliographic Details
Published inScripta materialia Vol. 56; no. 10; pp. 915 - 918
Main Authors Laha, K., Kyono, J., Shinya, N.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.05.2007
Subjects
Austenitic stainless steels
Cavitation
Copper
Creep
Creep (materials)
Creep rupture strength
Holes
Microalloying
Segregations
Steel
Stress-rupture
Surface segregation
Trace element
Trace element
Creep
Stress-rupture
Steel
Surface segregation
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Summary:Extensive creep cavitation precluded the beneficial effect of Cu addition on long-term creep rupture strength of 18Cr–12Ni–Nb (type 347) austenitic stainless steel. Microalloying with B and Ce suppressed creep cavitation to increase its creep rupture strength and ductility. Boron segregation on nucleated cavity surface instead of S retarded its growth. Cerium acted as a getter for soluble S to prevent its segregation on cavity surface.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2006.12.030