Skip to main content
SpringerLink
Log in

Local variation of impact toughness in tandem electro-gas welded joint

  • Research Paper
  • Published:
Welding in the World Aims and scope Submit manuscript

Abstract

To identify the microstructural factors causing the local brittleness in electro-gas (EG) welded joint, this study investigated the EG welded joints produced by tandem EGW process using two different ship-grade steel plates: high-nitrogen type TiN steel and conventional EH36 steel. Experimental results revealed that, in contrast to conventional steel, the TiN steel shows a large scattering in impact values at FL attributing to the localized grain coarsening limited to a very narrow area following fusion line. In addition, at the center of EG weld metal, a bundle of parallel columnar grains are formed aligning in a vertical welding direction resulting in the formation of grain boundary ferrite veins lined up in the same direction. Brittle nature of grain boundary ferrite makes the cracks propagate easily through these veins, causing a sudden drop in impact toughness at the center of EG weld metal.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11

Similar content being viewed by others

References

  1. Merk O (2018) Container ship size and port relocation, Discussion paper, International Transport Forum, Paris, France

  2. Malchow U (2017) Growth in containership sizes to be stopped? Maritime Business Review 2(3):199–210

    Article  Google Scholar 

  3. Helmy S, Shrabia A (2016) Mega container ships, pros, cons and its implication recession. J Shipp Ocean Eng 6(5):284–290

    Google Scholar 

  4. Hashiba Y., Kojima K., Kasuya T., Kumagai T. (2015) Development of welding consumables and welding process for newly developed steel plates, Nippon Steel & Sumitomo Metal Technical Report, No. 110, pp. 90–96

  5. Jang T-W, Moon J-H, Yoon DR (2004) High speed welding present and future in shipbuilding assembly stage. J KWJS 22(6):500–504 (in Korean)

    Google Scholar 

  6. Lee J-S, Yun J-O, Jeong S-H, Park CG, An YH (2010) The study about characteristics of welding consumables and weld metal for EGW. Journal of KWJS 28(2):199–203 (in Korean)

    Google Scholar 

  7. Sasaki K., Suda K., Motomatsu R., Hashiba Y., Ohkita S., Imai S.: Development of two-electrode electrogas arc welding process, Nippon Steel Tech. Report, July 2004, No. 90, pp. 67–74

  8. Jeong H-C, Park Y-H, An Y-H, Lee J-B (2007) Mechanical properties and microstructures of high heat input welded tandem EGW joint in EH36-TM steel. J KWJS 25(1):57–62 (in Korean)

    CAS  Google Scholar 

  9. Minagawa M, Ishida K, Funatsu Y, Imai S (2004) 390 MPa yield strength steel plate for large heat-input welding for large container ships, Nippon Steel Tech. Report, No. 90, pp.7–10

  10. Kimura T, Sumi H, Kitani Y (2005) High strength steel plates and welding consumables for architectural construction with excellent toughness in welded joint-‘JFE EWEL” technology for excellent quality in HAZ of high heat input welded joints, JFE Technical Report, No 5, pp. 45–52

  11. Jeong HC, An YH, Choo WY (2002) The effect of TiN particles on the HAZ microstructure and toughness in high nitrogen TiN steel. Int J KWS 2(1):25–28

    Google Scholar 

  12. Kanazawa S, Nakashima A, Okamoto K, Kanaya K (1975) Improved toughness of weld fusion zone by fine TiN particles and development of a steel for large heat input welding. Tetsu to Hagane 61(11):2589–2603

    Article  CAS  Google Scholar 

  13. Nishio K, Tashima K, Katoh M, Mukae S (1984) Effects of Ti and N on notch toughness of synthetic weld heat affect zone: Transaction of JWS. J Jpn Weld Soc 15(2):120–128

    CAS  Google Scholar 

  14. Liu C, Bhole SD (2013) Challenges and developments in pipeline weldability and mechanical properties. Sci Technol Weld Join 18(2):169–181

    Article  CAS  Google Scholar 

  15. Homma H, Ohkita S, Matsuda S, Yamamoto K (1987) Improvement of HAZ toughness in HSLA steel by introducing finely dispersed Ti-oxide. Weld J 66(10):301s–309s

    Google Scholar 

  16. Kojima A, Kiyose A, Uemori R, Minagawa M, Hoshino M, Nakashima T, Ishida K, Yasui H (2004) Super high HAZ toughness technology with fine microstructure imparted by fine particles, Nippon Technical Report, No. 90, pp 2–6

  17. Terada Y, Kojima A, Kiyose A, Nakashima T, Doi N, Hara T, Morimoto H, Sugiyama M (2004) High-strength linepipes with excellent HAZ toughness, Nippon Technical Report, No. 90, pp 88–93

  18. Suzuki S, Ichimiya K, Akita T (2005) High tensile strength steel plates with excellent HAZ toughness for shipbuilding —JFE EWEL technology for excellent quality in HAZ of high heat input welded joints, JFE Technical Report, No. 5, pp. 24–29

  19. Welding handbook, Volume 2, 7th edition, 1978, p. 254, ed. W. H. Kearns, pub. AWS, USA

  20. Choi W-H, Cho S-K, Choi W-K, Ko S-G, Han J-M (2012) Effects of microstructures on the toughness of high heat input EG welded joint of EH36-TM steel. J KWJS 30(1):64–71 (in Korean)

    Google Scholar 

  21. Norcross JE (1965) Electroslag/electrogas welding in the free world. Weld J 44(3):177–196

    Google Scholar 

  22. Norcross JE (1965) Properties of electroslag and electrogas welds. Weld J 44(3):135s–140s

    Google Scholar 

  23. Matsuda S, Okumura N (1978) Effect of TiN distribution of TiN precipitate particles on the austenite grain size. Trans ISIJ 18(4):198–205

    Article  CAS  Google Scholar 

  24. Morikage Y, Oi K, Kawabata F, Amano K (1998) Effect of TiN size on ferrite nucleation on TiN in low-C steel. Tetsu to Hagane 84(7):510–515 (in Japanese)

    Article  CAS  Google Scholar 

  25. Lee C, Nambu S, Inoue J, Koseki T (2011) Ferrite formation behavior from B1 compounds in steel. ISIJ Int 51(12):2036–2041

    Article  CAS  Google Scholar 

  26. Jin H-H, Shin C, Lee H-C, Kim W-W (2008) Nucleation of intragranular ferrite on B1-type non-metallic inclusions. Solid State Phenom 135:115–118

    Article  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Division of Materials Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea

    Kangmyung Seo & Changhee Lee

  2. Korea Institute of Industrial Technology (KITECH), 156 Gaetbeol-ro, Yeonsu-Gu, Incheon, 21999, Republic of Korea

    Hoisoo Ryoo

  3. R&D center, KISWEL, 704 Gongdan-ro, Seongsan-gu, Changwon-si, Gyeongnam, 51544, Republic of Korea

    Hee Jin Kim & Chul-gyu Park

Authors
  1. Kangmyung Seo
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Hoisoo Ryoo
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Hee Jin Kim
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Chul-gyu Park
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Changhee Lee
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Hee Jin Kim.

Additional information

Publisher’s note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Seo, K., Ryoo, H., Kim, H.J. et al. Local variation of impact toughness in tandem electro-gas welded joint. Weld World 64, 457–465 (2020). https://doi.org/10.1007/s40194-019-00844-8

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s40194-019-00844-8

Keywords

Search

Navigation