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March 26, 2026Open Access

Dissimilar fusion welding of NiTi shape memory alloy and AlCoCrFeNi₂. ₁ eutectic high entropy alloy using multi-interlayer strategy

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Authors

NANithin Joseph Reddy Sagili ArthurRKRae Eon KimAMAna Martins

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Overview

Dissimilar welding of NiTi and AlCoCrFeNi shows improved joint integrity using multi-interlayer strategy, indicating potential for smart systems.

Key Points

  • The aim is to achieve dissimilar welding between NiTi and AlCoCrFeNi alloys while avoiding brittle joint failures.
  • Used Nb and Cu interlayers for welding.
  • Performed CALPHAD simulations for phase evolution assessment.
  • Validated results with synchrotron X-ray diffraction.
  • Characterized microstructure using backscattered electron imaging and energy dispersive spectroscopy.
  • Achieved a peak hardness of 856 HV0.3 near the NiTi interface.
  • Ultimate tensile strength recorded at 372 MPa with fracture strain of 1.11%.
  • Crack initiated in the hardened interfacial region, leading to mixed-mode fracture.

Cite This Study

Arthur et al. (2026) studied this question.

synapsesocial.com/papers/69c4ccaffdc3bde4489181dfhttps://doi.org/10.3204/pubdb-2026-00994
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