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Laser Welding of Titanium Grade 2 and Aluminium AA 3105-O Using a New AlScZr Filler Metal

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Abstract

In this study, a pulsed Nd:YAG laser welding method is implemented to join Ti-G2 (1 mm thick) to AA3105-O (0.5 mm thick) via a ring of spots filled with AlScZr alloy (0.15 mm thick). The filler material improved the weld’s microstructure and mechanical properties by reducing the undesirable intermetallic compounds (IMCs) such as TiAl2 and TiAl3 in the aluminium re-solidified zone near the titanium/aluminium interface. The joints having AlScZr filler were mostly failed at Al heat affected zone (HAZ) during the tensile shear test. The addition of zirconium to binary Al–Sc system formed a substitutional solid-solution in which 50 wt% Zr+10 wt% Ti replaced Al3(Sc,Zr,Ti). Scandium had a strengthening effect by solid-solution and precipitation hardening effect due to the formation of Al3(Sc,Zr) particles. The joint strength rose from 86% (of the base Al strip) for autogenously laser weld to 102% with filler metal. Hardness increased steadily at the Ti/Al interaction zone, and the maximum hardness was reduced from 650 HV to 570 HV when filler metal was utilized.

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The raw/processed data required to reproduce these findings cannot be shared at this time as the data also forms part of an ongoing study.

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Acknowledgements

Support from the Iran National Centre for Laser Science and Technology, Sharif University of Technology, Iran, Iran National Science Foundation, and Institute of Laser for Postgraduate Studies, University of Baghdad, Iraq is acknowledged.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, College of Engineering, Diyala University, Diyala, Iraq

    Abeer A. Shehab & A. K. Mahmoud

  2. Institute of Laser for Postgraduate Studies, University of Baghdad, Baghdad, Iraq

    Abeer A. Shehab

  3. Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran

    S. K. Sadrnezhaad & A. H. Kokabi

  4. Department of Materials Science and Engineering, University of Kufa, Najaf, Iraq

    Muhaed Alali

  5. Department of Advanced Materials and Renewable Energies, Iranian Research Organization for Science and Technology (IROST), Tehran, 33535111, Iran

    Masood Fakouri Hasanabadi

  6. Iranian National Center for Laser Science and Technology, Tehran, Iran

    M. J. Torkamany

  7. Ministry of Oil, Midland Oil Company, Baghdad, Iraq

    Mohammed H. Abass

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  1. Abeer A. Shehab
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  2. S. K. Sadrnezhaad
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  8. A. H. Kokabi
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Correspondence to Masood Fakouri Hasanabadi.

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Shehab, A.A., Sadrnezhaad, S.K., Alali, M. et al. Laser Welding of Titanium Grade 2 and Aluminium AA 3105-O Using a New AlScZr Filler Metal. Lasers Manuf. Mater. Process. 9, 37–55 (2022). https://doi.org/10.1007/s40516-021-00159-x

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