Effect of Hot Cracks on EAC Crack Initiation and Growth in Nickel-Base Alloy Weld Metals
作者： Hannu Hänninen , Aki Toivonen , Anssi Brederholm , Tapio Saukkonen , Wade Karlsen
DOI: 10.1007/978-3-319-48760-1_13
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摘要: The differences in the EAC susceptibility between different weld geometries and metals have been distinguished by doped steam test method. Pure of Alloy 182 82 are clearly more susceptible to than pure 152 52, which did not show any crack initiation. dissimilar metal welds (DMW) with diluted microstructures less 82. No initiation/extension from hot cracks was observed studied metals. At tips no growth samples. This is related segregated microstructure tips. In accelerated tests selective dissolution takes place metallic Ni or NiO forms a continuous layer middle surrounded Cr-rich oxide layer. Selective typical for inside at their initiation occurred 600 base DMWs extensive. results discussed based on creep model EAC.
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