|Title:||Welded microstructure and orientation variation of duplex Ti alloy through electrodynamic vibration||Authors:||Liu, Chia-Heng
Chiu, Po -Kai
|Keywords:||Active flux;Vibration;EBSD;Weld;Duplex Ti alloy||Issue Date:||1-Nov-2022||Publisher:||ELSEVIER||Journal Volume:||21||Start page/Pages:||519-531||Source:||JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T||Abstract:||
Duplex Ti alloys are widely used in the petrochemical industry as well as in the biomedical, aeronautics and astronautics engineering fields. A duplex Ti alloy weldment is uniform and has superior properties in terms of welded microstructure evolution, grain refinement, and microhardness distribution. These properties are believed to be obtainable through tung-sten inert gas arc welding with a combination of electrodynamic vibration and active flux. This combination changes the welded metal to phase transformation products, leading to the reappearance of numerous low-angle grain boundaries (<= 5 degrees). Vibration is presumed to disturb the heat transfer and temperature gradient in a liquid melt welding pool, enhancing the nucleation and cooling rates. The final result is the rapid formation of many basket weave-like fine parallel elongated a' sheaths containing the 8-phase in the solidified welded metal.(c) 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
|Appears in Collections:||機械與機電工程學系|
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