期刊
MATERIALS LETTERS
卷 158, 期 -, 页码 325-328出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2015.05.159
关键词
Impact toughness; Microstructure; ZrO2 nanoparticles; Welding
In the present study, the effect of ZrO2 nanoparticles in the electrode coating on the impact properties of shielded metal arc welds was investigated. The microstructure, Charpy impact properties and fracture surface morphology of welds were evaluated and the results were compared. When the ZrO2 nanoparticle content in the electrode coating was increased, the morphology of ferrite was changed from grain boundary ferrite to acicular ferrite and the impact toughness of welds were improved. The test results showed that the impact properties of welds could be well correlated with the volume fraction of acicular ferrite, number of ZrO2 inclusions and percentage of shear fracture area. (C) 2015 Elsevier B.V. All rights reserved.
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