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Structure-property correlation of submerged-arc and gas-metal-arc weldments in HY-100 steel

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Abstract

Structure-property relationships of two HY-100 steel weldments prepared by submerged arc (SAW) and gas metal arc (GMAW) welding processes using identical heat input (2.2 kJ mm-1) have been studied. It has been found that submerged arc welded (SAW) HY-100 steel weldments have a lower weld toughness than welds produced by the gas metal arc welding (GMAW) process. Optical, scanning, and transmission electron microscopy were used in conjunction with microhardness traverses to characterize and compare the various microconstituents that are present in the last weld pass of both weldments. TEM examination revealed the presence of coarse upper bainite, B-II bainite, and carbides in a highly dislocated ferrite matrix as well as in ferrite laths in the SAW weldment, while the GMAW weldment exhibited a typical fine low carbon lath martensite, autotempered martensite, and mixed B-II and B-III bainites which occasionally contained small regions of twinned martensite. The measured cooling rate in the SAW was found to be about 40 pct slower than that in GMAW. It was also found in the SAW that the weld metal inclusion number density was about 25 pct greater than that in GMAW. Micro-hardness traverses exhibited significantly lower hardness (about 50 HV) in the SAW weldment compared with GMAW, but the tempered weld metal microhardness in both the weldments was measured about the same, at 250 HV. The ductile-to-brittle transition temperature (DBTT) of both weldments was determined by Charpy impact test. Based on an average energy criterion, the DBTT of the SAW weldment was 323 K (50 °C) higher than that of the GMAW weldment. This difference in fracture resistance is due to the different weld metal microstructures. The different microstructures most probably result from differences in cooling rate subsequent to welding; however, the SAW weld also has a higher inclusion number density which could promote a higher transformation temperature for the austenite.

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References

  1. P. Deb and K. D. Challenger:Metallography, 1984, vol. 17, pp. 253–272.

    Article  Google Scholar 

  2. G.T.B. Kellock, A. R. Sollars, and E. Smith:J.I.S.I., 1971, vol. 44(12), pp. 969–74.

    Google Scholar 

  3. E. Smith and R. L. Apps: Cranfield Institute of Technology Report Mat. No. 2, 1970.

  4. K. D. Challenger, R. B. Brucker, W. M. Elger, and M.J. Sorek:Welding Journal, 1984, vol. 63(8), pp. 254s-62s.

    Google Scholar 

  5. Current Welding Processes: American Welding Society, 1968, pp. 2-3.

  6. R. W. Flax, R. E. Keith, and M. D. Randall: ASTM STP 494, 1971, pp. 1-25.

  7. “Military Specification Steel Plate, Alloy, Structural, High Yield Strength HY-80 and HY-100,” Department of the Navy Military Specification MIL-S-16216J (Ships), 15 March 1972.

  8. D. J. Abson, R. E. Dolby, and P. H. M. Hart: Welding Institute Members Report, 67/1978/M, 1978.

  9. Y. Ito and M. Nakanishi:The Sumitomo Search, 1976, vol. 15(5), pp. 42–62.

    Google Scholar 

  10. R. E. Dolby: Welding Institute Members Report, 14/1976/M, 1976.

  11. D. J. Abson and R. E. Dolby: Welding Institute Research Bulletin, 1978, vol. 19(7), pp. 202–07.

    Google Scholar 

  12. E. Levine and D. C. Hill:Metall. Trans. A, 1977, vol. 8A, pp. 1453–63.

    Article  Google Scholar 

  13. R. W. Hertzberg:Deformation and Fracture Mechanics of Engineer-ing Materials, John Wiley and Sons, 2nd ed., 1976, pp. 393-99.

  14. T. Kunitake, F. Terasaki, Y. Ohmori, and H. Obtani:J.I.S.I., 1972, vol. 45(6), pp. 647–53.

    Google Scholar 

  15. J. P. Naylor and P. R. Krahe:Metall. Trans., 1974, vol. 5, pp. 1699–1701.

    Article  Google Scholar 

  16. D. Rosenthal:Trans. ASME, 1946, vol. 68, pp. 849–66.

    Google Scholar 

Download references

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Authors and Affiliations

  1. APTECH Engineering Services Inc., 94303, Palo Alto, CA

    P. Deb (Metallurgical Engineer)

  2. Materials Engineering Group, Mechanical Engineering Department, Naval Postgraduate School, 93943, Monterey, CA

    K. D. Challenger (Associate Professor)

  3. U. S. Navy, USA

    A. E. Therrien (LCDR)

Authors
  1. P. Deb
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  2. K. D. Challenger
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  3. A. E. Therrien
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Formerly Adjunct Research Professor with the Materials Engineering Group, Naval Postgraduate School

Formerly Graduate Student at NPS

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Deb, P., Challenger, K.D. & Therrien, A.E. Structure-property correlation of submerged-arc and gas-metal-arc weldments in HY-100 steel. Metall Trans A 18, 987–999 (1987). https://doi.org/10.1007/BF02668547

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