Addition of cerium and yttrium to ferritic steel weld metal to improve hydrogen trapping efficiency

Sung Jin Kim; Kang Mook Ryu; Min-suk Oh

doi:10.1007/s12613-017-1422-5

Volume 24 Issue 4

Apr. 2017

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2017 > 24(4): 415-422

Sung Jin Kim, Kang Mook Ryu, and Min-suk Oh, Addition of cerium and yttrium to ferritic steel weld metal to improve hydrogen trapping efficiency, Int. J. Miner. Metall. Mater., 24(2017), No. 4, pp. 415-422. https://doi.org/10.1007/s12613-017-1422-5

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Sung Jin Kim, Kang Mook Ryu, and Min-suk Oh, Addition of cerium and yttrium to ferritic steel weld metal to improve hydrogen trapping efficiency, Int. J. Miner. Metall. Mater., 24(2017), No. 4, pp. 415-422. https://doi.org/10.1007/s12613-017-1422-5

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Research Article

Addition of cerium and yttrium to ferritic steel weld metal to improve hydrogen trapping efficiency

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Corresponding authors:
Sung Jin Kim E-mail: sjkim56@sunchon.ac.kr

Min-suk Oh E-mail: misoh@kitech.re.kr
Received: 8 August 2016; Revised: 9 November 2016; Accepted: 10 November 2016

Abstract

Abstract

The applicability of Ce and Y as promising candidate elements to form irreversible traps in weld metal was investigated by thermal desorption spectroscopy (TDS) with gas chromatography (GC).The precise nature of the precipitate particles newly formed in the weld metal by the addition of Ce and Y to a certain alloy system was characterized.Moreover,the hydrogen trapping efficiency expressed as the reduction of the diffusible hydrogen in the weld metal was analyzed.The results showed that the addition of Ce and/or Y to this alloy system led to the formation of a mixed type of (Ce,Ti)-based oxide,(Y,Ni)-based carbide,or (Ce,Y,Ti)-based oxide particles.Because of the high activation energy of the mixed type of particles (≥ 150 kJ/mol),the trapping efficiency for hydrogen was considered to be sufficiently high to effectively reduce the diffusible hydrogen content.
- hydrogen trapping;
- weld;
- rare earth metals;
- cerium;
- yttrium;
- activation energy

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