Unveiling the microstructure evolution and mechanical properties in a gas tungsten arc-welded Fe–Mn–Si–Cr–Ni shape memory alloy

authored by: J. G. Lopes, D. Martins, K. Zhang, B. Li, B. Wang, X. Wang, N. Schell, E. Ghafoori, A. C. Baptista, J. P. Oliveira
Abstract: Fe–Mn–Si–Cr–Ni shape memory alloys (SMAs) are unique low-cost materials with shape memory properties that grant them the ability to be used in both functional and structural applications. Such SMAs are especially sought in the construction sector for the creation of new components and/or the reinforcement of damaged ones. In this study, a Fe–17Mn–5Si–10Cr–4Ni–1(V, C) wt% SMA was gas tungsten arc welded, with the objective to investigate the microstructure and mechanical performance changes occurring after welding. A comprehensive assessment of processing, microstructure and properties relationships was established combining microscopy (optical and electron), synchrotron X-ray diffraction, microhardness mapping and tensile testing including cycling assessment of the joint’s functional performance. It is shown that the present SMA has good weldability, with the joints reaching nearly 883 MPa at fracture strain of 23.6 ± 2.1%. Alongside this, several microstructure differences were encountered between the as-received and as-welded condition, including the formation of ferrite and Fe₅Ni₃Si₂ P2₁3 cubic precipitates amidst the fusion zone in the latter region. Graphical abstract: (Figure presented.)
Organisation(s): Institute of Steel Construction
External Organisation(s): NOVA University Lisbon
University of Waterloo
Western Superconducting Technologies Co., Ltd.
Harbin Institute of Technology
McMaster University
Helmholtz-Zentrum hereon GmbH
Type: Article
Journal: Journal of materials science
Volume: 59
Pages: 7387-7408
No. of pages: 22
ISSN: 0022-2461
Publication date: 05.2024
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Ceramics and Composites, Materials Science (miscellaneous), General Materials Science, Mechanics of Materials, Mechanical Engineering, Polymers and Plastics
Electronic version(s): https://doi.org/10.1007/s10853-024-09606-4 (Access: Open)

BibTeX

@article{3c33b74190674c788d048a7f206279ef,
title = "Unveiling the microstructure evolution and mechanical properties in a gas tungsten arc-welded Fe–Mn–Si–Cr–Ni shape memory alloy",
abstract = "Fe–Mn–Si–Cr–Ni shape memory alloys (SMAs) are unique low-cost materials with shape memory properties that grant them the ability to be used in both functional and structural applications. Such SMAs are especially sought in the construction sector for the creation of new components and/or the reinforcement of damaged ones. In this study, a Fe–17Mn–5Si–10Cr–4Ni–1(V, C) wt% SMA was gas tungsten arc welded, with the objective to investigate the microstructure and mechanical performance changes occurring after welding. A comprehensive assessment of processing, microstructure and properties relationships was established combining microscopy (optical and electron), synchrotron X-ray diffraction, microhardness mapping and tensile testing including cycling assessment of the joint{\textquoteright}s functional performance. It is shown that the present SMA has good weldability, with the joints reaching nearly 883 MPa at fracture strain of 23.6 ± 2.1%. Alongside this, several microstructure differences were encountered between the as-received and as-welded condition, including the formation of ferrite and Fe5Ni3Si2 P213 cubic precipitates amidst the fusion zone in the latter region. Graphical abstract: (Figure presented.)",
author = "Lopes, {J. G.} and D. Martins and K. Zhang and B. Li and B. Wang and X. Wang and N. Schell and E. Ghafoori and Baptista, {A. C.} and Oliveira, {J. P.}",
note = "Funding Information: JGL and JPO acknowledge Funda{\c c}{\~a}o para a Ci{\^e}ncia e a Tecnologia (FCT–MCTES) for its financial support via the project UID/00667/2020 (UNIDEMI). JPO, DM and ACP acknowledge the funding by national funds from FCT–Funda{\c c}{\~a}o para a Ci{\^e}ncia e a Tecnologia, I.P., in the scope of the projects LA/P/0037/2020, UIDP/50025/2020 and UIDB/50025/2020 of the Associate Laboratory Institute of Nanostructures, Nanomodelling and Nanofabrication – i3N. JGL acknowledges FCT – MCTES for funding the Ph.D. grant 2020.07350.BD. K. Z. acknowledges support from China Scholarship Council (CSC). The authors also acknowledge the support granted by the Natural Sciences and Engineering Research Council of Canada (NSERC), Canada Research Chairs (CRC). Transmission electron microscopy was performed at the Canadian Centre for Electron Microscopy (also supported by NSERC and other government agencies). The authors would also like to thank re-fer AG, Switzerland, to supply the material required for the experiments.",
year = "2024",
month = may,
doi = "10.1007/s10853-024-09606-4",
language = "English",
volume = "59",
pages = "7387--7408",
journal = "Journal of materials science",
issn = "0022-2461",
publisher = "Springer Netherlands",
number = "17",
}