Effect of weld metal microstructure on cold crack susceptibility of high strength weld

Hee Jin Kim; Jun Seok Seo; Jae Hak Kim; Ka Hee Kim; Jin Hyun Koh; Hoi Soo Ryoo; Moo Young Huh

doi:10.4028/www.scientific.net/msf.580-582.13

Effect of weld metal microstructure on cold crack susceptibility of high strength weld

Hee Jin Kim, Jun Seok Seo, Jae Hak Kim, Ka Hee Kim, Jin Hyun Koh, Hoi Soo Ryoo, Moo Young Huh

Honorary professors

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Facing the practical difficulties in reducing the diffusible hydrogen content of fluxcontaining welding consumables like flux-cored are welding (FCAW) wires, the present study investigated the microstructural aspect to improve the hydrogen-induced cold crack (HICC) resistance of multipass weld metal of 600MPa strength. Two FCA welding wires were prepared by controlling the Ni content to give different weld microstructure, but to have similar levels of hardness and diffusible hydrogen content. HICC susceptibility of those two consumables was evaluated by 'G-BOP test' and also by 'multi-pass weld metal cold cracking test'. As a result of this study, it was demonstrated that microstructural modification with decreased proportion of grain boundary ferrite (GF) improved cold crack resistance of weld metal. The detrimental effect of GF against HICC has also been addressed based on the characteristics of weld metal cold cracking.

Original language	English
Title of host publication	Materials Science Forum - Advanced Welding and Micro Joining/Packaging for the 21st Century - Selected peer reviewed papers from the International Welding/Joining Conference-Korea 2007, IWJC 2007
Editors	Chang Hee Lee, Jong-Bong Lee, Jong-Bong Lee, Dong-Hwan Park, Suck-Joo Na
Publisher	Trans Tech Publications Ltd
Pages	13-16
Number of pages	4
ISBN (Electronic)	978-0-87849-360-9
DOIs	https://doi.org/10.4028/www.scientific.net/msf.580-582.13
Publication status	Published - 2008
Event	International Welding/Joining Conference-Korea 2007, IWJC 2007 - Seoul, Korea, Republic of Duration: 2007 May 10 → 2007 May 12

Publication series

Name	Materials Science Forum
Volume	580-582
ISSN (Print)	0255-5476
ISSN (Electronic)	1662-9752

Other

Other	International Welding/Joining Conference-Korea 2007, IWJC 2007
Country	Korea, Republic of
City	Seoul
Period	07/5/10 → 07/5/12

Keywords

Acicular ferrite
Cold cracking
Diffusible hydrogen
Grain boundary ferrite
Weld metal

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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Cite this

Kim, H. J., Seo, J. S., Kim, J. H., Kim, K. H., Koh, J. H., Ryoo, H. S., & Huh, M. Y. (2008). Effect of weld metal microstructure on cold crack susceptibility of high strength weld. In C. H. Lee, J-B. Lee, J-B. Lee, D-H. Park, & S-J. Na (Eds.), Materials Science Forum - Advanced Welding and Micro Joining/Packaging for the 21st Century - Selected peer reviewed papers from the International Welding/Joining Conference-Korea 2007, IWJC 2007 (pp. 13-16). (Materials Science Forum; Vol. 580-582). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/msf.580-582.13

Effect of weld metal microstructure on cold crack susceptibility of high strength weld. / Kim, Hee Jin; Seo, Jun Seok; Kim, Jae Hak; Kim, Ka Hee; Koh, Jin Hyun; Ryoo, Hoi Soo; Huh, Moo Young.

Materials Science Forum - Advanced Welding and Micro Joining/Packaging for the 21st Century - Selected peer reviewed papers from the International Welding/Joining Conference-Korea 2007, IWJC 2007. ed. / Chang Hee Lee; Jong-Bong Lee; Jong-Bong Lee; Dong-Hwan Park; Suck-Joo Na. Trans Tech Publications Ltd, 2008. p. 13-16 (Materials Science Forum; Vol. 580-582).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Kim, HJ, Seo, JS, Kim, JH, Kim, KH, Koh, JH, Ryoo, HS & Huh, MY 2008, Effect of weld metal microstructure on cold crack susceptibility of high strength weld. in CH Lee, J-B Lee, J-B Lee, D-H Park & S-J Na (eds), Materials Science Forum - Advanced Welding and Micro Joining/Packaging for the 21st Century - Selected peer reviewed papers from the International Welding/Joining Conference-Korea 2007, IWJC 2007. Materials Science Forum, vol. 580-582, Trans Tech Publications Ltd, pp. 13-16, International Welding/Joining Conference-Korea 2007, IWJC 2007, Seoul, Korea, Republic of, 07/5/10. https://doi.org/10.4028/www.scientific.net/msf.580-582.13

Kim HJ, Seo JS, Kim JH, Kim KH, Koh JH, Ryoo HS et al. Effect of weld metal microstructure on cold crack susceptibility of high strength weld. In Lee CH, Lee J-B, Lee J-B, Park D-H, Na S-J, editors, Materials Science Forum - Advanced Welding and Micro Joining/Packaging for the 21st Century - Selected peer reviewed papers from the International Welding/Joining Conference-Korea 2007, IWJC 2007. Trans Tech Publications Ltd. 2008. p. 13-16. (Materials Science Forum). https://doi.org/10.4028/www.scientific.net/msf.580-582.13

Kim, Hee Jin ; Seo, Jun Seok ; Kim, Jae Hak ; Kim, Ka Hee ; Koh, Jin Hyun ; Ryoo, Hoi Soo ; Huh, Moo Young. / Effect of weld metal microstructure on cold crack susceptibility of high strength weld. Materials Science Forum - Advanced Welding and Micro Joining/Packaging for the 21st Century - Selected peer reviewed papers from the International Welding/Joining Conference-Korea 2007, IWJC 2007. editor / Chang Hee Lee ; Jong-Bong Lee ; Jong-Bong Lee ; Dong-Hwan Park ; Suck-Joo Na. Trans Tech Publications Ltd, 2008. pp. 13-16 (Materials Science Forum).

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abstract = "Facing the practical difficulties in reducing the diffusible hydrogen content of fluxcontaining welding consumables like flux-cored are welding (FCAW) wires, the present study investigated the microstructural aspect to improve the hydrogen-induced cold crack (HICC) resistance of multipass weld metal of 600MPa strength. Two FCA welding wires were prepared by controlling the Ni content to give different weld microstructure, but to have similar levels of hardness and diffusible hydrogen content. HICC susceptibility of those two consumables was evaluated by 'G-BOP test' and also by 'multi-pass weld metal cold cracking test'. As a result of this study, it was demonstrated that microstructural modification with decreased proportion of grain boundary ferrite (GF) improved cold crack resistance of weld metal. The detrimental effect of GF against HICC has also been addressed based on the characteristics of weld metal cold cracking.",

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AB - Facing the practical difficulties in reducing the diffusible hydrogen content of fluxcontaining welding consumables like flux-cored are welding (FCAW) wires, the present study investigated the microstructural aspect to improve the hydrogen-induced cold crack (HICC) resistance of multipass weld metal of 600MPa strength. Two FCA welding wires were prepared by controlling the Ni content to give different weld microstructure, but to have similar levels of hardness and diffusible hydrogen content. HICC susceptibility of those two consumables was evaluated by 'G-BOP test' and also by 'multi-pass weld metal cold cracking test'. As a result of this study, it was demonstrated that microstructural modification with decreased proportion of grain boundary ferrite (GF) improved cold crack resistance of weld metal. The detrimental effect of GF against HICC has also been addressed based on the characteristics of weld metal cold cracking.

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