Microstructure and mechanical properties of gas metal arc welded CoCrFeMnNi joints using a 308 stainless steel filler metal

Jiajia Shen, Rita Gonçalves, Yeon Taek Choi, J. G. Lopes, Jin Yang, N. Schell, Hyoung Seop Kim, J. P. Oliveira

Research output: Contribution to journalArticlepeer-review

84 Citations (Scopus)
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Abstract

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.

Original languageEnglish
Article number115053
Number of pages6
JournalScripta Materialia
Volume222
DOIs
Publication statusPublished - 1 Jan 2023

Keywords

  • CoCrFeMnNi high entropy alloy
  • Mechanical properties testing
  • Solidification
  • Synchrotron X-ray diffraction
  • Welding

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