Ni₃Al-Base Alloy of Laser Welding Behavior Research

Abstract:

This text does on research on welding behavior of the Ni3Al alloy casting MX246A of based on laser as heat source. First process parameters have effects on crack sensitive in the study. Laser power decided to heat input and the depth of the weld, which has obvious effects on the hot crack. Crack sensitivity of welding at low speed is quite lower than it at high scanning speed; low scanning speed can reduce the sensitivity of weld cracking. Because of the laser absorption and solidification of weld metal for inheritance of the basic material, grain degree of materials makes a significant impact on crack. Crack sensitivity in the fine grain areas is quite lower than it in the coarse grain areas. It is found in the study that the main reason for the weld crack is Mo elements gathering and caused the oxidation of the partial. Welding of MX246A alloy is realized on the basis of the above research, and performance of welding joint is up to more than 75% of base material.

• Periodical: Advanced Materials Research (Volumes 418-420)
• Pages: 1531-1537
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.418-420.1531
• Online since: December 2011
• Authors: Dong Yun Zhang, Hai Yun Gao, Kun Lu, He Li Luo, Shang Ping Li
• Keywords: Hot Crack, IMC, Laser Welding, Ni₃Al-Base Alloy

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