Microstructure and Mechanical Properties of Nd:YAG Laser Welded Invar 36 Alloy

Abstract:

Invar 36 alloy is increasingly used as a structural material for manufacture of liquefied natural gas (LNG) transporters and storage tanks. However, the conventional arc welding of Invar 36 alloy has high susceptibility of hot-cracking. As a high-energy-beam welding process, laser welding could be effective for producing defect-free Invar 36 weld. In the present study, defect-free Invar 36 weld was successfully produced by Nd:YAG laser welding. The microstructure and mechanical properties of weld were also tested.

• Periodical: Materials Science Forum (Volumes 675-677)
• Pages: 739-742
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.675-677.739
• Online since: February 2011
• Authors: Yue Zhao, Ai Ping Wu, Wei Yao, Zhi Min Wang, Yutaka S. Sato, Hiroyuki Kokawa
• Keywords: Invar 36 Alloy, Laser Welding, Microstructure, Precipitation

References

[1] M. Shiga, Current Opinion In Solid State & Materials Science 1 (1996), p.340.

[2] J. L. Corbacho, J. C. Suarez, and F. Molleda, Materials Characterization 41 (1998), p.27.

[3] T. Ogawa, Welding Journal 65 (1986), p. s213.

[4] K.Y. Benyounis, A.G. Olabi, and M.S.J. Hashmi, Journal of Materials Processing Technology 164-165 (2005), p.978.

[5] D. Wu, B. Yin, Q. Zhou, X. Wang, and Z. Jin, Optics and Precision Engineering 17 (2009), p.557.

[6] X. Zhang, Study on Formation and Prevention of Keyhole-induced Porosity, Doctoral thesis, Tsinghua University, ID 2110302004210292 (2006).