Abstract
Liquid gallium-indium eutectic has seen an expansion of applicability, such as a multifunctional electro-thermal fluid within a NiTi shape memory alloy actuator. Various NiTi alloys and elemental Ni, Ti, and Cu were exposed to liquid gallium alloys from 220 °C to 950 °C for up to 1200 h. NiTi was additionally thermally cycled through martensite-to-austenite for 270 cycles. SEM and X-ray spectroscopy revealed corrosion morphology and reaction layer chemistry. Each tested NiTi alloy and Ti did not exhibit liquid metal-induced corrosion until a threshold between 400 °C to 600 °C, while Ni and Cu are attacked at temperatures as low as 220 °C.
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