Investigation on welding phenomenon for aluminum alloy by superposition of pulsed YAG laser and diode laser

Shin Haraguchi, Yasuhiro Okamoto, Yoshiyuki Uno, Tomokazu Sakagawa, Shin Ichi Nakashiba

Research output: Contribution to journalArticle

8 Citations (Scopus)


A pulsed Nd:YAG laser and a continuous diode laser were spatially superposed for higher absorption of laser beam to aluminum alloy. 12-20% increase in the bead width and 15-30% increase in the weld depth could be obtained by the superposition of continuous diode laser and pulsed Nd:YAG laser. Moreover, the unsteady thermal analysis with a key-hole effect indicated that the temperature of specimen surface with a continuous diode laser could be kept approximately 300K higher than that without a continuous diode laser. Therefore, it was clarified that the bead width and depth would increase greatly due to higher absorption of Nd:YAG laser to aluminum alloy by the superposition of a continuous diode laser.

Original languageEnglish
Pages (from-to)875-882
Number of pages8
JournalJournal of Advanced Mechanical Design, Systems and Manufacturing
Issue number5
Publication statusPublished - Dec 1 2010



  • Aluminum alloy
  • High-efficient welding
  • LD
  • Pulsed Nd:YAG laser
  • Thermal analysis

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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