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Welding in the World

, Volume 61, Issue 6, pp 1155–1168 | Cite as

Effect of interpass temperature on the microstructure and mechanical properties of multi-pass weld metal in a 550-MPa-grade offshore engineering steel

  • X. L. Wang
  • Y. T. Tsai
  • J. R. YangEmail author
  • Z. Q. Wang
  • X. C. Li
  • C. J. ShangEmail author
  • R. D. K. Misra
Research Paper

Abstract

The influence of interpass temperature on the microstructure and mechanical properties of multi-pass weld joints (up to 36-mm thickness) by submerged arc welding (SAW) was studied from the perspective of offshore engineering. Optimal mechanical properties were obtained with the interpass temperature of ~130 °C. Decreasing interpass temperature from 130 to 80 °C increases the strength and hardness at the cost of impact toughness of the weld joint due to the formation of hard phases including bainite and martensite. Increasing the interpass temperature from 130 to 250 °C promotes a larger volume fraction of coarse M-A constituents and larger inter-spacing of high-angle boundaries, which, in turn, deteriorates the toughness. In addition, a large amount of M-A constituent necklacing prior austenite grains was observed in the reheated zone of all weld metals and was responsible for the low impact energy of the weld joint.

Keywords (IIW Thesaurus)

Offshore engineering steel Interpass temperature Weld metal M-A constituent Toughness Effective grain size 

Notes

Acknowledgements

This work is financially supported by the Natural Science Foundation of China (51371001). Thanks to Mr. Min Li from Technology Center, Jinan Iron & Steel Co., Ltd., for the operation of welding experiment. R.D.K. Misra gratefully acknowledges the support of the University of Texas at El Paso.

References

  1. 1.
    Hu L, Wang PJ (2012) Research on production process of high strength and toughness E550 steel plate for offshore platforms. Baosteel Technol 1:36–42Google Scholar
  2. 2.
    Liu DS, Li QL, Emi T (2011) Microstructure and mechanical properties in hot-rolled extra high-yield-strength steel plates for offshore structure and shipbuilding. Metall Mater Trans A 42:1349–1361CrossRefGoogle Scholar
  3. 3.
    Zhou YL, Jia T, Zhang XJ, Liu ZY, Misra RDK (2015) Investigation on tempering of granular bainite in an offshore platform steel. Mater Sci Eng A 626:352–361CrossRefGoogle Scholar
  4. 4.
    Dirk S, Thomas K, Arne K (2014) Influence of heat control on welding stresses in multilayer-component welds of high-strength steel S960QL. Adv Mater Res 996:475–480CrossRefGoogle Scholar
  5. 5.
    Peng Y, Wang AH, Xiao HJ, Tian ZL (2012) Effect of interpass temperature on microstructure and mechanical properties of weld metal of 690 MPa HSLA steel. Mater Sci Forum 706-709:2246–2252CrossRefGoogle Scholar
  6. 6.
    Li XD, Ma XP, Subramanian SV, Misra RDK, Shang CJ (2015) Structure-property-fracture mechanism correlation in heat-affected zone of X100 ferrite-bainite pipeline steel. Metall Mater Trans E 2:1–11Google Scholar
  7. 7.
    Li XD, Ma XP, Subramanian SV, Shang CJ, Misra RDK (2014) Influence of prior austenite grain size on martensite-austenite constituent and toughness in the heat affected zone of 700MPa high strength linepipe steel. Mater Sci Eng A 616:141–147CrossRefGoogle Scholar
  8. 8.
    Lan LY, Qiu CL, Zhao DW, Guo XH, Du LX (2011) Microstructural characteristics and toughness of the simulated coarse grained heat affected zone of high strength low carbon bainitic steel. Mater Sci Eng A 529:192–200CrossRefGoogle Scholar
  9. 9.
    You Y, Shang CJ, Chen L, Subramanian SV (2013) Investigation on the crystallography of the transformation products of reverted austenite in intercritically reheated coarse grained heat affected zone. Mater Des 43:485–491CrossRefGoogle Scholar
  10. 10.
    Danilo R, Vladimir G (2005) Simulations of transformation kinetics in a multi-pass weld. Mater Manuf Process 20:833–849CrossRefGoogle Scholar
  11. 11.
    Matsuda F, Ikeuchi K, Fukada Y, Horii Y, Okada H, Shiwaku T, Shiga C, Suzuki S (1995) Review of mechanical and metallurgical investigations of martensite-austenite constituent in welded joints in Japan. Trans JWRI 24:1–24Google Scholar
  12. 12.
    Lee CS, Chandel RS, Seow HP (2000) Effect of welding parameters on the size of heat affected zone of submerged arc welding. Mater Manuf Process 15:649–666CrossRefGoogle Scholar
  13. 13.
    Evans GM (1995) Microstructure and properties of ferritic steel welds containing Al and Ti. Weld J 74:249–261Google Scholar
  14. 14.
    Jang J, Lee BW, Ju JB, Kwon D, Kim WS (2002) Crack-initiation toughness and crack-arrest toughness in advanced 9 Pct Ni steel welds containing local brittle zones. Metall Mater Trans A 33:2615–2622CrossRefGoogle Scholar
  15. 15.
    Wang XL, Wang XM, Shang CJ, Misra RDK (2016) Characterization of the multi-pass weld metal and the impact of retained austenite obtained through intercritical heat treatment on low temperature toughness. Mater Sci Eng A 649:282–292CrossRefGoogle Scholar
  16. 16.
    Byun JC, Bang KS, Chang WS, Park CG, Chung WH (2006) Effects of heat input and interpass temperature on the strength and impact toughness of multipass weld metal in 570MPa grade steel. J KWS 24:64–70Google Scholar
  17. 17.
    Lee HW, Choe WH, Park JU, Kang CY, Park WJ (2006) Weld metal hydrogen assisted cracking in 50 mm TMCP steel plate with SAW process. Sci Technol Weld Join 11:243–249CrossRefGoogle Scholar
  18. 18.
    LePera FS (1979) Improved etching technique for the determination of percent martensite in high-strength dual-phase steels. Metallography 12:263–268CrossRefGoogle Scholar
  19. 19.
    Gourgues A-F, Flower HM, Lindley TC (2000) Electron backscattering diffraction study of acicular ferrite, bainite, and martensite steel microstructures. Mater Sci Technol 16:26–40CrossRefGoogle Scholar
  20. 20.
    Wang XL, Tsai YT, Yang JR, Shang CJ, Wang XM, Dong LM, Yang WW (2016) Investigation of the microstructure and toughness of 550 MPa grade pipeline after the hot-bending process. Mater Sci Technol 32:664–674CrossRefGoogle Scholar
  21. 21.
    Zhou WH, Wang XL, Venkatsurya PKC, Guo H, Shang CJ, Misra RDK (2014) Structure-mechanical property relationship in a high strength low carbon alloy steel processed by two-step intercritical annealing and intercritical tempering. Mater Sci Eng A 607:569–577CrossRefGoogle Scholar
  22. 22.
    Zhong Y, Xiao FR, Zhang JW, Shan YY, Wang W, Yang K (2006) In situ TEM study of the effect of M/A films at grain boundaries on crack propagation in an ultra-fine acicular ferrite pipeline steel. Acta Mater 54:435–443CrossRefGoogle Scholar
  23. 23.
    Tuma JV, Sedmak A (2004) Analysis of the unstable fracture behaviour of a high strength low alloy steel weldment. Eng Fract Mech 71:1435–1451CrossRefGoogle Scholar
  24. 24.
    Beidokhti B, Koukabi AH, Dolati A (2009) Influences of titanium and manganese on high strength low alloy SAW weld metal properties. Mater Charact 60:225–233CrossRefGoogle Scholar
  25. 25.
    Ferrante M, Farrar RA (1982) The role of oxygen rich inclusions in determining the microstructure of weld metal deposits. J Mater Sci 17:3293–3298CrossRefGoogle Scholar
  26. 26.
    Yang JR, Yang CC, Huang CY (1992) The coexistence of acicular ferrite and bainite in an alloy-steel weld metal. J Mater Sci Lett 11:1145–1146CrossRefGoogle Scholar
  27. 27.
    Lee S, Kim BC, Kwon D (1992) Correlation of microstructure and fracture properties in weld heat-affected zones of thermomechanically controlled processed steels. Metall Mater Trans A 23:2803–2816CrossRefGoogle Scholar
  28. 28.
    Kim BC, Lee S, Kim NJ, Lee DY (1991) Microstructure and local brittle zone phenomena in high-strength low-alloy steel welds. Metall Trans A 22:139–149CrossRefGoogle Scholar
  29. 29.
    Li XD, Fan YR, Ma XP, Subramanian SV, Shang CJ (2015) Influence of martensite-austenite constituents formed at different intercritical temperatures on toughness. Mater Des 67:457–463CrossRefGoogle Scholar
  30. 30.
    Davis CL, King JE (1994) Cleavage initiation in the intercritically reheated coarsegrained heat-affected zone: part I. Fractographic evidence. Metall Mater Trans A 25:563–573CrossRefGoogle Scholar
  31. 31.
    Wu DY, Han XL, Tian HT, Liao B, Xiao FR (2015) Microstructural characterization and mechanical properties analysis of weld metals with two Ni contents during post-weld heat treatments. Metall Mater Trans A 46:1973–1984CrossRefGoogle Scholar
  32. 32.
    Furuhara T, Kawata H, Morito S, Maki T (2006) Crystallography of upper bainite in Fe-Ni-C alloys. Mater Sci Eng A 431:228–236CrossRefGoogle Scholar

Copyright information

© International Institute of Welding 2017

Authors and Affiliations

  1. 1.School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijingChina
  2. 2.Department of Materials Science and EngineeringNational Taiwan UniversityTaipeiTaiwan
  3. 3.Collaborative Innovation Center of Steel TechnologyUniversity of Science and Technology BeijingBeijingChina
  4. 4.Laboratory for Excellence in Advanced Steel Research, Department of Metallurgical, Materials and Biomedical EngineeringUniversity of TexasEl PasoUSA

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