Journal Article

PUBDB-2026-01024

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Dissimilar gas tungsten arc welding of an AlCoCrFeNi high entropy alloy to 316 L stainless steel

Lopes, J. (Corresponding author)Extern* ; Agrawal, P. ; Gonçalves, R. M.Extern* ; Shen, J. ; Chassaing, D. ; Boll, T. ; Schell, N.HZG*Hereon* ; Mishra, R. S.Extern* ; Baptista, A. C.Extern* ; Oliveira, J. P. (Corresponding author)Extern*

2026
Science Direct New York, NY

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Please use a persistent id in citations: doi:10.1016/j.matchar.2026.116260  doi:10.3204/PUBDB-2026-01024

Abstract: High entropy alloys (HEAs) are unique and novel materials with remarkable properties that render themcompetitive for developing key engineering applications within modern engineering sectors. In the present study,a AlCoCrFeNi HEA was gas tungsten arc welded to 316 L stainless steel, with the aim of assessing the compatibilityin terms of microstructure and mechanical performance. These dissimilar joints was obtained with a torchspeed of 3.5 mm/s and a current intensity of 90 A under a protective Argon atmosphere. Subsequently, athorough evaluation of the relationship between processing parameters, microstructure and properties wasperformed via optical and electron microscopy, atom probe tomography, synchrotron X-ray diffraction, microhardnessmapping and tensile testing. The results reveal that the AlCoCrFeNi HEA can be successfully weldedwith 316 L stainless steel, producing a high-quality and reliable joint, where a gradual microstructural variationis observed across the interface. A good balance of a high tensile strength of ≈568 MPa and fracture strain of≈11.7% was obtained, with fracture occurring in the fusion zone, highlighting the potential of these dissimilarjoints for critical structural applications.

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Contributing Institute(s):

1. Helmholtz-Zentrum Hereon (Hereon)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. CALIPSOplus - Convenient Access to Light Sources Open to Innovation, Science and to the World (730872) (730872)
3. NEP - Nanoscience Foundries and Fine Analysis - Europe|PILOT (101007417) (101007417)
4. FS-Proposal: I-20231128 EC (I-20231128-EC) (I-20231128-EC)

Experiment(s):

1. PETRA Beamline P07 (PETRA III)

Appears in the scientific report 2026

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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