Skip to main content
SpringerLink
Log in

Correlated macrostructural parameters of weld and weld current in the SMAW of small pipes

  • Published:
Journal of Mechanical Science and Technology Aims and scope Submit manuscript

Abstract

The present research investigated the effect of increased weld current on the apparent discontinuities, macrostructure, and hardness in the shielded metal arc welding of pipes. Thin, small pipes were butt welded, and the section view of the weld was observed using an optical microscope equipped with an image analyzer. Vickers hardness measurements were also made. The results indicated that the area of the melting zone and the width of the weld at the midpoint of pipe thickness were the appropriate parameters for assessing the weld current. In contrast, the lengths of the columnar grain zone and hardness values were not correlated with the current levels. A moderate current level caused the mechanical properties of the melting zone to become closer to those of the parent metal.

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

Access this article

Log in via an institution

We’re sorry, something doesn't seem to be working properly.

Please try refreshing the page. If that doesn't work, please contact support so we can address the problem.

Similar content being viewed by others

References

  1. API Standard 1104, Welding of pipelines and related facilities, 19th ed. American Petroleum Institute (1999).

  2. ANSI/AWS Standard D10.12-89, Recommended practices and procedures for welding low carbon steel pipe, American Welding Society (1989).

  3. ASME Section IX, Qualification standard for welding and brazing procedures, welders, brazers, and welding and brazing operators, QW part, American Society of Mechanical Engineers (1998).

  4. H. K. D. H. Bhadeshia, Sir Robert Honeycombe, Steels Microstructure and Properties, 3th Edition, Elsevier Ltd. (2006).

  5. R. W. Messler: Principles of Welding, WILEY-VCH Verlag GmbH & Co. KGaA; Weinheim (2004).

    Google Scholar 

  6. C. L. Tsai and C. M. Tso, Heat flow in fusion welding, ASM Handbook, 9th Edition, United States of America: ASM International, 6 (1983) 7–18.

    Google Scholar 

  7. D. P. Koisten and R. E. Marburger, A general equation prescribing the extent of the austenite-martensite transformation in pure iron-carbon alloys and plain carbon steels, Acta Met., 7 (1959) 59–60.

    Article  Google Scholar 

  8. R. C. Reed and H. K. D. H. Bhadeshia, Modelling of brittle zones in the HAZ of steel welds, Acta Metall. et Mater., 42 (1994) 3663–3678.

    Article  Google Scholar 

  9. J. C. Ion, K. E. Easterling and M. F. Ashby, A second report on diagram of microstructure and hardness for heat affected zones in welds, Acta Met., 32 (1982) 1949–1962.

    Article  Google Scholar 

  10. S. Kou, Welding Metallurgy, 2nd Edition, John Wiley & Sons Inc., New Jersey (2003).

    Google Scholar 

  11. V. Pavelic, R. Tanbakuchi, O. Uyehara and A. Myers, Experimental and computed temperature histories in gas tungsten arc welding of thin plates, Weld. J. Res. Suppl., 48 (1969) 295–305.

    Google Scholar 

  12. N. E. Dowling, Mechanical Behavior of Material, Prentice-Hall International, INC., New Jersey (1993).

    Google Scholar 

  13. S. H. Avner, Introduction to Physical Metallurgy, 2nd Edition, McGraw Hill, New York (2001).

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Mechanical Engineering, School of Engineering, Razi University, Kermanshah, 67149, Iran

    M. E. Aalami-Aleagha

  2. Department of Materials Engineering, Science and Research Branch, Islamic Azad University, Kermanshah, 67149, Iran

    A. M. Rashidi

Authors
  1. M. E. Aalami-Aleagha
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. A. M. Rashidi
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to M. E. Aalami-Aleagha.

Additional information

This paper was recommended for publication in revised form by Associate Editor Sung-Lim Ko

M. E. Aalami-Aleagha received his Ph.D from the Nottingham University, England in 2003, and was appointed as Assistant Professor in the Department of Mechanical Engineering at the Razi University, Iran. His research interests include thermal spray coating deposition and weld process modeling. He also worked in the industry of renewing worn parts. He has been engaged in five national projects as the principal investigator and project leader. He is a member of the Research Committee of Iranian National Gas.

A. M. Rashidi received his M.S and Ph.D degrees in Materials Engineering from the University of Tehran, Iran in 1994 and 2009, respectively. He is an assistant professor in the Department of Mechanical Engineering at the Razi University. Currently, he is the head of the Department of Materials Engineering, Science and Research Branch, Islamic Azad University, Kermanshah, Iran. His research interests are in the field of nanomaterials, high temperature corrosion and coatings, electrodeposition, as well as physical metallurgy.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Aalami-Aleagha, M.E., Rashidi, A.M. Correlated macrostructural parameters of weld and weld current in the SMAW of small pipes. J Mech Sci Technol 26, 181–185 (2012). https://doi.org/10.1007/s12206-011-0939-1

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s12206-011-0939-1

Keywords

Search

Navigation