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Sources of Variability and Lower Values in Toughness Measurements of Weld Metals

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Abstract

In this paper, the sources of variability and lower values in toughness measurements of a high-strength low alloy weld metal are investigated by detailed observations of fracture surfaces and the microstructures at crack initiation. The results reveal that the variability of the notch Charpy toughness is related to the location of the cleavage initiation origins. The three factors jointly contribute to give rise to variability and lower value of toughness. That is, (1) the location that the notch is sampled at deposited weld metal or reheated weld metal, (2) the location that a large grain region is appeared on the path ahead of the notch root, (3) the distributed location of the defect or the brittle second-phase particle. When three factors were simultaneously satisfied, the lower value of the Charpy toughness is appeared. The notch is sampled at the largest grain region at deposited weld metal, and the defect or the brittle second-phase particle is close to the notch root and sampled by its high stress field, the lowest Charpy toughness is obtained.

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References

  1. S.D. Bhole, J.B. Nemade, L. Collins, and C. Liu, Effect of Nickel and Molybdenum Additions on Weld Metal Toughness in a Submerged Arc Welded HSLA Line-Pipe Steel, J. Mater. Process. Technol., 2006, 173, p 92–100

    Article  Google Scholar 

  2. Z.Z. Zhu, J. Han, and H.J. Li, Influence of Heat Input on Microstructure and Toughness Properties in Simulated CGHAZ of X80 Steel Manufactured Using High-Temperature Processing, Metall. Mater. Trans. A, 2015, 46A, p 5467–5475

    Article  Google Scholar 

  3. B. Beidokhti, A. Koukabi, and A. Dolati, Influences of Titanium and Manganese on High Strength Low Alloy SAW Weld Metal Properties, Mater. Charact., 2009, 60, p 225–233

    Article  Google Scholar 

  4. M.H. Avazkonandeh-Gharavol, M. Haddad-Sabzevar, and A. Haerian, Effect of Copper Content on the Microstructure and Mechanical Properties of Multipass MMA Low Alloy Steel Weld Metal Deposits, Mater. Des., 2009, 30, p 1902–1912

    Article  Google Scholar 

  5. J.H. Kong and C.S. Xie, Effect of Molybdenum on Continuous Cooling Bainite Transformation of Low-Carbon Microalloyed Steel, Mater. Des., 2006, 27, p 1169–1173

    Article  Google Scholar 

  6. F.S. Jaberi and A.H. Kokabi, Influence of Nickel and Manganese on Microstructure and Mechanical Properties of Shielded Metal Arc-Welded API-X80 Steel, J. Mater. Eng. Perform., 2012, 21, p 1447–1454

    Article  Google Scholar 

  7. B. Hutchinson, Heat Effected Zone Microstructures and Their Influence on Toughness in Two Microalloyed HSLA Steels, Acta Mater., 2015, 97, p 380–391

    Article  Google Scholar 

  8. J. Neves and A. Loureiro, Fracture Toughness of Welds—Effect of Brittle Zones and Strength Mismatch, J. Mater. Process. Technol., 2004, 153–154, p 537–543

    Article  Google Scholar 

  9. K. Prasad and D.K. Dwivedi, Some Investigations on Microstructure and Mechanical Properties of Submerged Arc Welded HSLA Steel Joints, Int. J. Adv. Manuf. Technol., 2008, 36, p 475–483

    Article  Google Scholar 

  10. Kahraman Sirin, Sule Y. Sirin, and Erdinc Kaluc, Influence of the Interpass Temperature on t8/5 and the Mechanical Properties of Submerged Arc Welded Pipe, J. Mater. Process. Technol., 2016, 238, p 152–159

    Article  Google Scholar 

  11. L.Y. Lan, C.L. Qiu, D.W. Zhao et al., Analysis of Microstructural Variation and Mechanical Behaviors in Submerged Arc Welded Joint of High Strength Low Carbon Bainitic Steel, Mater. Sci. Eng. A, 2012, 558, p 592–601

    Article  Google Scholar 

  12. D.P. Fairchild, Local Brittle Zone in Structural Welds (Denver, 1987), p. 303–318.

  13. M.A. Quintana, S.S. Babu, J. Najor, C. Dallam, and M. James. Weld metal toughness-sources of variation, in Proceedings of the 8th International Pipeline Conference, Alberta, Canada, 2010, p. 1–10

  14. A.A.B. Sugden and H.K.D.H. Bhadeshia, Microstructural entropy and the scatter in toughness, Recent Trends in Welding Science and Technology, S.A. David and J.M. Vitek, Ed., ASM International, Ohio, 1989, p 745–748

    Google Scholar 

  15. J.H. Chen and R. Cao, Micromechanism of Cleavage Fracture of Metals, Elsevier, Houston, 2014, ISBN 978-0-12-800765-5

    Google Scholar 

  16. R. Cao, J. Li, D.S. Liu, J.Y. Ma, and J.H. Chen, Micromechanism of Decrease of Impact Toughness in Coarse-Grain Heat-Affected Zone of HSLA Steel with Increasing Welding Heat Input, Metall. Mater. Trans. A, 2015, 46A, p 2999–3013

    Article  Google Scholar 

  17. J.H. Chen, C. Yan, and J. Sun, Further Study on the Mechanism of Cleavage Fracture at Low Temperature, Acta Metall. Mater., 1994, 43, p 251–261

    Article  Google Scholar 

  18. Yonghe Yang, Lei Shi, Xu Zhen, Lu Hongsheng, Xu Chen, and Xin Wang, Fracture Toughness of the Materials in Welded Joint of X80 Pipeline Steel, Eng. Fract. Mech., 2015, 148, p 337–349

    Article  Google Scholar 

  19. J.H. Chen, L. Zhu, and H. Ma, On the Scattering of the Local Fracture Stress σ f, Acta Metall. Mater., 1990, 38, p 2527–2535

    Article  Google Scholar 

  20. G.E. Dieter, Mechanical Metallurgy, McGraw-Hill Co., New York, 1986

    Google Scholar 

  21. J.R. Griffiths and D.R. Owen, An Elastic-Plastic Stress Analysis for a Notched Bar in Plane Strain Bending, J. Mech. Phys. Solids, 1971, 19, p 419–431

    Article  Google Scholar 

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Acknowledgment

This work was financially supported by National Nature Science Foundation of China (Nos. 51675255).

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Authors and Affiliations

  1. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal, Department of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, People’s Republic of China

    R. Cao, J. J. Yuan, J. Y. Ma, G. J. Mao, X. B. Zhang & J. H. Chen

  2. Hobart Brothers Company, An ITW Welding Company, Troy, OH, 45373, USA

    Z. G. Xiao

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  1. R. Cao
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  2. J. J. Yuan
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  3. Z. G. Xiao
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  4. J. Y. Ma
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  5. G. J. Mao
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  7. J. H. Chen
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Correspondence to R. Cao or J. H. Chen.

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Cao, R., Yuan, J.J., Xiao, Z.G. et al. Sources of Variability and Lower Values in Toughness Measurements of Weld Metals. J. of Materi Eng and Perform 26, 2472–2483 (2017). https://doi.org/10.1007/s11665-017-2686-7

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  • DOI: https://doi.org/10.1007/s11665-017-2686-7

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