J Appl Electrochem (2017) 47:1083–1090 DOI 10.1007/s10800-017-1096-8 SHORT COMMUNICATION Columnar structure and electrochemical anisotropy of a nickel-based superalloy fabricated via laser solid forming 1,2 1,2 1,2 • • Pengfei Guo Xin Lin Weidong Huang Received: 8 March 2017 / Accepted: 10 June 2017 / Published online: 17 June 2017 Springer Science+Business Media B.V. 2017 Abstract Electrochemical anisotropy has drawn substan- the (001) crystal zone. The HS was ﬁrst measured to be tial attention in the ﬁelds of electrochemical dissolution more electrochemically stable but it has a higher anodic and corrosion, and it is related to the surface energy levels dissolution rate than VS in 10 wt% NaNO . Contrast in a single-phase alloy. Here, laser solid forming (LSF) analysis indicates that the electrochemical anisotropy can Inconel 718 alloy was found to be a multi-phase alloy with primarily be attributed to the columnar structure. There- a strong ﬁber texture. Its horizontal section (HS), in which fore, researchers should be very careful when using a secondary phases have a tube-like distribution, mainly surface energy model to predict the electrochemical ani- consists of the (001) crystallographic plane, while a vertical sotropy of a highly textured alloy. section (VS) with a strip-like secondary
Journal of Applied Electrochemistry – Springer Journals
Published: Jun 17, 2017
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