Open AccessStudy on Corrosion Resistance of Pulse Laser Welded Joints of Hastelloy C-276
Author(s) -
Ying Wang,
Lei Du,
Dawei Liu,
Desheng Xu
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/440/2/022077
Subject(s) - materials science , corrosion , welding , base metal , metallurgy , microstructure , joint (building) , metal , composite material , structural engineering , engineering
Laser welding is an ideal method to join hastelloy C-276 for the good characters. Presently, there are few studies on corrosion resistance of the weld joint of hatselloy C-276. The corrosion resistance of hastelloy C-276 pulse laser welded joints was studied in this paper. The results of the electrochemical testing both in neutral and acidic solution show that the corrosion resistance of the weld is better than the base metal. The microstructure was analyzed by using SEM, EDS and XRD, it is found that the grain of the weld obviously is refined and the size reduces to 2-5μm, which is benefit to the corrosion resistance, and slight micro-segregation of Mo occurs and no second phase formation in the weld which has little effect on the corrosion resistance. The change of the microstructure makes it that the corrosion resistance of the weld is superior to that of the base metal.