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@ARTICLE{Arthur:645024,
author = {Arthur, Nithin Joseph Reddy Sagili and Kim, Rae Eon and
Kim, Hyoung Seop and Martins, Ana and Schell, N. and
Oliveira, João Pedro},
title = {{G}as tungsten arc welding of {N}i{T}i shape memory alloy
and ${A}l{C}o{C}r{F}e{N}i_{2.1}$ eutectic high entropy alloy
using a niobium interlayer},
journal = {Intermetallics},
volume = {191},
number = {109177},
issn = {0966-9795},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {PUBDB-2026-00547},
pages = {1-15},
year = {2026},
abstract = {Dissimilar fusion welding of a NiTi shape memory alloy and
an AlCoCrFeNi2.1 eutectic high entropy alloy wasperformed
using a niobium interlayer. The unique properties of these
materials complement each other,potentially enabling hybrid
structures for advanced applications and smart systems. Gas
tungsten arc weldingwith an arc offset technique was
employed to create a weld-braze joint at the NiTi-Nb
interface while controllingthe heat input. Comprehensive
microstructural and phase analysis was carried out using
optical and electronmicroscopy, synchrotron X-ray
diffraction, and was further supplemented by thermodynamic
simulations.Dissolution of the Nb interlayer altered the
solidification pathways in the fusion zone, leading to the
formation oftopologically close-packed phases (including C14
Laves and σ) and Ti2Ni. Multiple interfacial reactions at
theNiTi interface introduced significant strain, which
increased hardness but also acted as stress
concentratorsduring tensile loading. The addition of the
niobium interlayer enabled the formation of a stable,
crack-free joint,whereas welding without an interlayer
resulted in catastrophic cracking.},
cin = {DOOR ; HAS-User / Hereon},
ddc = {670},
cid = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)Hereon-20210428},
pnm = {6G3 - PETRA III (DESY) (POF4-6G3) / FS-Proposal: I-20241103
EC (I-20241103-EC)},
pid = {G:(DE-HGF)POF4-6G3 / G:(DE-H253)I-20241103-EC},
experiment = {EXP:(DE-H253)P-P07-20150101},
typ = {PUB:(DE-HGF)16},
doi = {10.1016/j.intermet.2026.109177},
url = {https://bib-pubdb1.desy.de/record/645024},
}