Journal
SCRIPTA MATERIALIA
Volume 222, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2022.115053
Keywords
CoCrFeMnNi high entropy alloy; Welding; Solidification; Synchrotron X-ray diffraction; Mechanical properties testing
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This study establishes a correlation between welding process, microstructure, and mechanical properties, laying the foundations for the successful joining and application of welded joints based on high entropy alloys using low-cost arc-based welding technologies.
In this paper, gas metal arc welding of a CoCrFeMnNi high entropy alloy was performed using 308 stainless steel filler wire. Electron backscatter diffraction and synchrotron X-ray diffraction were used to determine the microstructural evolution, while microhardness mapping and non-contact digital image correlation were employed to assess the local mechanical response across the welded joints. Further, thermodynamic calculations were implemented to support the understanding of the microstructure evolution. Through a systematic analysis of the microstructure evolution and mechanical properties, it is established a correlation between welding process, microstructure and mechanical properties. Besides, this work lays the foundations for the use of low-cost arc-based welding technologies for successful joining and application of welded joints based on high entropy alloys.
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