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Proposal of a New G-BOP Test to Evaluate Cracks in Weld Beads in Thin Sheets

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Abstract

The objective of the present work is the evaluation of a proposal for a gapped bead-on-plate (G-BOP) test, used for study of hydrogen cracks in relatively thin sheets of welded steel. That new proposal consists of the replacement of the usual solid blocks by an assembly of blocks in such a way that the test can evaluate weld beads on thin sheets. Student t distribution is applied to examine the functionality of the proposed test. Weld metals were deposited with flux-cored wires E71T-1 and E71T8-K6, with diameters of 1.6 and 1.7 mm, respectively, under two different preheating temperatures. Metal susceptibility to hydrogen cracking was evaluated by the presence and percentage of cracks in the weld metal. In order to evaluate and verify the functionality of the new G-BOP test proposal, the following were examined: efficiency of the new test in inducing hydrogen cracks in the weld metal, result replicability, fracture modes present in cracks, and the cooling rate imposed on the welding zone. Results showed that the new G-BOP test proposal is viable; results were replicable and the test was efficient in inducing cracks in weld metal with a confidence of 90%.

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References

  1. Tsuboi, K., Yatabe, H., Yamada, K.: Hydrogen induced cracking in high strength steel. Mater. Sci. Technol. 12, 400 (1996)

    CAS  Google Scholar 

  2. Yurioka, N., Suzuki, H.: Hydrogen assisted cracking in C-Mn and low alloy steel weldments. Int. Mater. Rev. 35(4), 217–252 (1990)

    CAS  Google Scholar 

  3. Graville, B.A., McParlan, M.: Weld metal cold cracking. Met. Construct. Feb 6(2), 62–63 (1974)

    Google Scholar 

  4. McParlan, M., Graville, B.A.: Development of the G-BOP test for weld metal cracking, IIW, Doc. n. IX-922, 12 (1975)

  5. Atkins, G., Thiessen, D., Nissley, N., Adonyi, Y.: Welding process effects in weldability testing of steel. Weld. J. 11, 61s–68s (2002)

    Google Scholar 

  6. Davidson, J.L.: Hydrogen-induced cracking of low carbon—Low alloy steel weldments. Mater. Forum 19, 35–51 (1995)

    CAS  Google Scholar 

  7. Montgomery, D.C.: Design and Analysis of Experiments, 4th edn, p. 428. Wiley, New York (1996)

    Google Scholar 

  8. Adonyi, Y.: In: Weldability of High Performance Steels, Conference Proceedings, Steel Bridge Design and Construction for the New Millennium with Emphasis on High Performance Steel, 2000, http://www.nabro.unl.edu/articles/20002012/download/Adonyi1.pdf

  9. Silva, J.H.F.: Proposal of a New Test to Evaluate the Susceptibility of Weld Metals to the Hydrogen Induced Cracking Phenomenon in Different Environments. Ph.D. Thesis, State University of Campinas, Campinas-SP, Brazil (2005)

  10. Chakravarti, A.P., Bala, S.R.: Evaluation of weld metal cold cracking using the G-BOP test. Weld. J. 01(Suppl), 1-s–8-s (1989)

    Google Scholar 

  11. Linnert, G.E.: Welding Metallurgy—Carbon and Alloy Steels, 4th edn, p. 176. American Welding Society, Miami, FL (1994)

    Google Scholar 

  12. Beachem, C.D.: A new model for hydrogen-assisted cracking (hydrogen embrittlement). Metall. Trans. 3, 437–451 (1972)

    Article  CAS  Google Scholar 

Download references

Acknowledgments

The authors express their thanks to Fapesp and CNPq for financial support of fundamental importance for this work and to the Faculty of Mechanical Engineering of UNICAMP for the indispensable laboratory infrastructure.

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Authors and Affiliations

  1. Federal Center of Technologic Education of the Bahia, Metallurgy Coordination, Simoes Filho, BA, Brazil

    José Hilton Ferreira da Silva

  2. Department of Mechanical Engineering, State University of Campinas (UNICAMP), Sao Paulo, Brazil

    Hipolito Carvajal Fals & Roseana da Exaltação Trevisan

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  1. José Hilton Ferreira da Silva
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  2. Hipolito Carvajal Fals
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  3. Roseana da Exaltação Trevisan
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Correspondence to Hipolito Carvajal Fals.

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da Silva, J.H.F., Fals, H.C. & da Exaltação Trevisan, R. Proposal of a New G-BOP Test to Evaluate Cracks in Weld Beads in Thin Sheets. J Fail. Anal. and Preven. 9, 74–80 (2009). https://doi.org/10.1007/s11668-008-9199-5

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  • DOI: https://doi.org/10.1007/s11668-008-9199-5

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