Analysis of Microstructure and Mechanical Properties of 2A97T3 Al-Li Alloy Fiber Laser Welding Joint

Abstract:

2A97 Al-Li alloy with good comprehensive performance is a new type of Al-Li alloys in our country,in order to meet the ever-increased long-term requirements of aerospace,aviation and armament industries,microstructure and mechanical properties of 2A97Al-Li alloy fiber laser welding joint were analyzed in this paper.The results show that:2A97 Al-Li alloy laser welding joints from welding fusion line to the center of welding seam are non-dendritic equiaxed grain zone,columnar crystal zone,columnar dendrite zone,equiaxed dendrite zone.Precipitates θ,T₂ and T₁ are probably exited in FZ,hardness of the center of FZ is the lowest.Yield strength of welding joints are about 70% of base metal,tensile strength are approximately 63% of the base metal.

• Periodical: Advanced Materials Research (Volume 1095)
• Pages: 677-683
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1095.677
• Online since: March 2015
• Authors: Zhen Yi*, Li Chen, En Guang He, Ming Chang
• Keywords: 2A97Al-Li Alloy, Laser Welding, Mechanical Property, Microstructure Characteristic

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