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Effects of grain-boundary phases on hydrogen embrittlement of Fe-Ni-Cr austenitic alloys
Zhang Jian; Li Xiuyan; Zhao Mingjiu; Rong Lijian
Corresponding AuthorRong Lijian(ljrong@imr.ac.cn)
2008-09-01
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume44Issue:9Pages:1095-1098
AbstractDynamic mechanical analyzer was used to investigate the hydrogen embrittlement of two Fe-Ni-Cr austenitic alloys with and without boron. The effects of boron, hydrogen and grain-boundary phases on internal friction of the alloys were analyzed. OM and SEM were used to observe the microstructures and grain-boundary phases. The results showed that abundant Ni3Ti (eta) phases and a few carbides precipitated at grain boundaries in the alloy without boron, while only a few carbides precipitated at grain boundaries in the alloy with 0.008%B. Thermal hydrogen charging caused two new internal friction peaks at about 26 and 36 degrees C in the alloys with and without boron, respectively. And the peaks are resulted from the interaction between hydrogen atoms and the grain boundaries decorated by precipitates. Boron decreased the temperature and activation energy of the hydrogen induced internal friction peak, so it is suggested that the inhibition of the grain-boundary phase precipitation by boron reduces the ability of grain boundary to trap hydrogen atoms. As a result, boron lowered the ductility loss of the alloy.
Keywordinternal friction hydrogen embrittlement Fe-Ni-Cr austenitic alloy
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000259475500013
PublisherSCIENCE CHINA PRESS
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/94757
Collection中国科学院金属研究所
Corresponding AuthorRong Lijian
AffiliationChinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Zhang Jian,Li Xiuyan,Zhao Mingjiu,et al. Effects of grain-boundary phases on hydrogen embrittlement of Fe-Ni-Cr austenitic alloys[J]. ACTA METALLURGICA SINICA,2008,44(9):1095-1098.
APA Zhang Jian,Li Xiuyan,Zhao Mingjiu,&Rong Lijian.(2008).Effects of grain-boundary phases on hydrogen embrittlement of Fe-Ni-Cr austenitic alloys.ACTA METALLURGICA SINICA,44(9),1095-1098.
MLA Zhang Jian,et al."Effects of grain-boundary phases on hydrogen embrittlement of Fe-Ni-Cr austenitic alloys".ACTA METALLURGICA SINICA 44.9(2008):1095-1098.
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