Advertisement

Microstructural and mechanical evaluation of a dissimilar joining between SAE 1020 and AISI 304 steel obtained via ultra-high-frequency-pulsed GTAW

  • Felipe José dos SantosEmail author
  • Gabriel Benedet Dutra
  • Tiago Vieira da Cunha
Technical Paper
  • 49 Downloads

Abstract

Two welding process parameters (the amplitude and frequency of the pulsed current) were varied in order to investigate their influence on the microstructure of the weld region and the mechanical properties of the joints. This investigation and the subsequent discussion were made based on the results of metallographies, tensile tests, and Vickers microhardness tests. The introduction of pulsed current at ultra-high frequencies resulted in a significant reduction in the size of the heat-affected zone (HAZ) for both materials: up to 54% for carbon steel and up to 73% for stainless steel. An increase in the grain size in the carbon steel HAZ was also noted. There are indications that the pulsed current at ultra-high frequencies has accelerated the atomic diffusion process of alloying elements from the fusion zone (FZ) to the carbon steel HAZ. Martensitic grains were observed in the FZ and the microhardness test verified this finding, once the microhardness values measured were around 400 HV0.3. The tensile strength was around 450 MPa and the rupture occurred on the carbon steel side, for all samples.

Keywords

Dissimilar welding GTAW Current pulsation Ultra-high frequencies 

Notes

Acknowledgements

The authors would like to thank the Federal University of Santa Catarina, especially the Welding Technology Laboratory (LTS) and the Laboratory of Materials (LabMat) for providing technical support for this research.

References

  1. 1.
    Wu W et al (2015) Microstructure, mechanical properties and corrosion behavior of laser welded dissimilar joints between ferritic stainless steel and carbon steel. Mater Des Tianjin, China 65:855–861Google Scholar
  2. 2.
    Lima LIL et al (2010) Caracterização microestrutural de soldas dissimilares dos aços ASTM A-508 e AISI 316L. Soldag Insp 15(2):112–120CrossRefGoogle Scholar
  3. 3.
    Campos WRDC et al (2009) Caracterização Microestrutural de Solda Dissimilar - Aço Inoxidável Austenitíco AISI 304 Com Adição de Liga de Níquel Inconel 625. Tecnol Metal Mater 6(1):19–23Google Scholar
  4. 4.
    Ul-Hamid A et al (2005) Failure of weld joints between carbon steel pipe and 304 stainless steel elbows. Eng Fail Anal 12(2):181–191CrossRefGoogle Scholar
  5. 5.
    Arivazhagan N et al (2011) Investigation on AISI 304 austenitic stainless steel to AISI 4140 low alloy steel dissimilar joints by gas tungsten arc, electron beam and friction welding. Mater Des 32(5):3036–3050CrossRefGoogle Scholar
  6. 6.
    Kurt B (2007) The interface morphology of diffusion bonded dissimilar stainless steel and medium carbon steel couples. J Mater Process Technol 190(1–3):138–141CrossRefGoogle Scholar
  7. 7.
    Sun Q et al (2009) Penetration increase of AISI 304 using ultrasonic assisted tungsten inert gas welding. Sci Technol Weld Join 14(8):765–767CrossRefGoogle Scholar
  8. 8.
    Watanabe T et al (2003) The effect of ultrasonic vibration on the mechanical properties of austenitic stainless steel weld. Q J Jpn Weld Soc 21:249–255CrossRefGoogle Scholar
  9. 9.
    Zhang C et al (2001) Improving Weld Quality by Arc-Excited Ultrasonic Treatment. Tsinghua Sci Technol Beijing 6(5):475–478Google Scholar
  10. 10.
    Ghosh A et al (2011) Prediction of HAZ width of submerged arc welded plates. Adv Mater Res 284-286:2481–2484CrossRefGoogle Scholar
  11. 11.
    Voigt A et al (2016) Efeitos da Pulsação Ultrassônica da Corrente sobre a Geometria da ZF e ZAC na Soldagem Arco Submerso. Sold Insp 21(3):354–362CrossRefGoogle Scholar
  12. 12.
    Silva C et al (2017) Análise mecânica e microestrutural de soldas produzidas pelo processo de arco submerso com pulsação ultrassônica da corrente. Matéria (Rio de Janeiro) 22(4):1–12CrossRefGoogle Scholar
  13. 13.
    American Society for Testing and Materials – ASTM (2016) Standard Test Methods for Tension Testing of Metallic Materials. ASTM E8/E8 M – 16a. West Conshohocken, PA, USAGoogle Scholar
  14. 14.
    Bain EC (1939) Functions of the alloying elements in steel. American Society for Metals, ClevelandGoogle Scholar
  15. 15.
    Dubé CA et al (1958) La formation de la ferrite proeutectoïde dans les aciers au carbone. Rev Métall 55(3):201–210CrossRefGoogle Scholar
  16. 16.
    Aaronson HI (1962) The proeutectoid ferrite and proeutectoid cementite reactions. In: Zackay VF, Aaronson HI (eds) Decomposition of austenite by diffusional processes. Interscience, New York, pp 387–546Google Scholar
  17. 17.
    ASM Handbook (1990) Properties and selection: irons, steels, and high-performance alloys, vol 1. ASM International, Materials ParkGoogle Scholar
  18. 18.
    Schaeffler AL (1949) Constitution diagram for stainless steel weld metal. Metal Progress 56(11):680Google Scholar
  19. 19.
    Ma H et al (2015) Microstructure characterization and properties of carbon steel to stainless steel dissimilar metal joint made by friction welding. Mater Des 86:587–597CrossRefGoogle Scholar
  20. 20.
    Silva SL (2016) Análise de juntas soldadas de aços dissimilares AISI 304 e SAE 1020 com metais de adição ER 309L e ER 70S3 pelo processo GTAW. 2016. 69 p. Dissertation - Mechanical Engineering Course, São Paulo State University Júlio de Mesquita Filho, GuaratinguetáGoogle Scholar
  21. 21.
    ASM Handbook (1991) Heat treating, vol 4. ASM International, Materials ParkGoogle Scholar
  22. 22.
    Whang SH (2011) Nanostructured metals and alloys: processing, microstructure, mechanical properties and applications. Woodhead Publishing, CambridgeCrossRefGoogle Scholar

Copyright information

© The Brazilian Society of Mechanical Sciences and Engineering 2018

Authors and Affiliations

  • Felipe José dos Santos
    • 1
    Email author
  • Gabriel Benedet Dutra
    • 1
  • Tiago Vieira da Cunha
    • 1
  1. 1.Technological Center of Joinville (CTJ)Federal University of Santa Catarina (UFSC)JoinvilleBrazil

Personalised recommendations