TPWJ, 2018, #4, 11-13 pages
Effect of main impurities on formation of cracks in welding of copper-nickel alloys and surfacing of monel on steel
Journal The Paton Welding Journal
Publisher International Association «Welding»
ISSN 0957-798X (print)
Issue #4, 2018 (April)
V.A. Anoshin, V.M. Ilyushenko and E.P. Lukyanchenko
E.O. Paton Electric Welding Institute of the NAS of Ukraine
11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail: email@example.com
Effect of main impurities on formation of cracks in welding of copper-nickel alloys, including in welding and surfacing of monel on steel, was investigated. Methods of optical metallography and electron-fractography analysis determined that the cracks have intercrystalline and solidification nature. Emission X-ray spectrum analysis determined significant (27 times) enrichment of gray surface of cracks forming in monel welding. It is shown that oxygen intensifies detrimental effect of sulfur in monel surfacing in contrast to welding of low-carbon steel. Carried theoretical calculations of significant saturation of boundaries of grains with detrimental impurities at small coefficient of distribution are of interest for explaining the reason of solidification crack formation on other nickel alloys. 6 Ref., 1 Table, 4 Figures.
copper-nickel alloys, detrimental impurities, solidification cracks
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