Laser micro-welding of Cu-Al dissimilar metals

  • Wenqing ShiEmail author
  • Wenhua Wang
  • Yanlu Huang


To study laser micro-welding technology of dissimilar metals, experimental research has been conducted on laser micro-welding of a fine copper wire to an Al pin of an integrated circuit chip. The results show that a Nd:YAG pulse laser welding system with a maximum output power of 300 W can successfully join a fine copper wire of 0.25-mm diameter with an Al pin. The process parameters include a single pulse energy of 3.3 J, a defocusing amount of −0.5 mm, and a peak power of 0.7 kW. During the laser micro-welding process, the laser beam illuminates the surface of the fine copper wire, which has high melting temperature and good fluidity, melting it so that the Al pin becomes submerged in the copper melt, attaining common defects such as blowholes and cracks and exhibiting poor fluidity and high oxidability. Solution-diffusion welding is conducted, and good metallurgical bonding is obtained between the fine copper wires and the Al pins with the decrease of their temperature.


Laser micro-welding Cu-Al dissimilar metals Solution-diffusion welding 


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  1. 1.
    Tao L-Q (2004) The characteristic analyze of precession welding on pellicular PCB base welding. Equip Electron Prod Manuf 7:69–73Google Scholar
  2. 2.
    Pierpaolo C, Antonello A, Palazzo GS (2015) Microstructural aspects in Al-Cu dissimilar joining by FSW. Int J Adv Manuf Technol 79(5-8):1109–1116CrossRefGoogle Scholar
  3. 3.
    Zhou J, Tsai H-L (2007) Effects of electromagnetic force on melt flow and porosity prevention in pulsed laser keyhole welding. Int J Heat Mass Transf 50:2217–2235CrossRefzbMATHGoogle Scholar
  4. 4.
    Haboudou A, Peyrea P, Vannes AB, Peix G (2003) Reduction of porosity content generated during Nd:YAG laser welding of A356 and AA5083 aluminium alloys. Mater Sci Eng 363:40–52CrossRefGoogle Scholar
  5. 5.
    Mai TA, Spowage AC (2004) Characterisation of dissimilar joints in laser welding of steel–kovar, copper–steel and copper–aluminium. Mater Sci Eng A 374:224–233CrossRefGoogle Scholar
  6. 6.
    Olabi AG, Alsinani FO, Alabdulkarim AA, Ruggiero A, Tricarico L, Benyounis KY (2013) Optimizing the CO2 laser welding process for dissimilar materials. Opt Lasers Eng 51:832–839CrossRefGoogle Scholar
  7. 7.
    Wang S-X, Fan Y-Y (2009) Analysis of bond mechanism on Al-Cu heterogeneous metal welding. Electr Manuf 6:43–45Google Scholar
  8. 8.
    Zhang Q-Z, Gong W-B, Liu W (2015) Microstructure and mechanical properties of dissimilar Al–Cu joints by friction stir welding. Trans Nonferrous Metals Soc China 25:1779–1786CrossRefGoogle Scholar
  9. 9.
    An Z-B (2008) Research on laser welding between heterogeneous metal material. Xi’an: Master’s Dissertation of Northwest UniversityGoogle Scholar
  10. 10.
    Hu B, Richardson IM (2006) Mechanism and possible solution for transverse solidification cracking in laser welding of high strength aluminium alloys. Mater Sci Eng A 429:287–294CrossRefGoogle Scholar
  11. 11.
    Liu S-Y, Meng D, Huang D-K (2004) Research status in laser welding of aluminum alloys. Mater For Mech Eng 28(9):5–8Google Scholar
  12. 12.
    Wang Z-M, Gu L, Li H-W, Liu G, Cheng Q-F (2007) Laser welding process of aluminum alloy ZL114A. Process Aerospace Mater 4:55–57Google Scholar
  13. 13.
    Wang G (2005) Study on laser welding process for tailor-welded blanks of aluminum alloy. Lan Zhou: Master’s Dissertation of Lanzhou University of Science and TechnologyGoogle Scholar
  14. 14.
    Kuo TY, Lin HC (2006) Effects of pulse level of Nd-YAG laser on tensile properties and formability of laser weldments in automotive aluminum alloys. Mater Sci Eng A 416:281–289CrossRefGoogle Scholar

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© Springer-Verlag London 2015

Authors and Affiliations

  1. 1.College of ScienceGuangdong Ocean UniversityZhanjiangChina
  2. 2.School of Mechanical and Automotive EngineeringSouth China University of TechnologyGuangzhouChina

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