| Abstract Scope |
The refinement of localized heating techniques holds great potential for extending the boundaries of ultrahigh temperature (UHT) mechanical testing. Moving beyond the inherent inertia of conventional furnaces, localized heating enables faster thermal response times, higher peak temperatures, simpler test systems, smaller specimens, and line-of-sight monitoring. Here we consider induction, laser, and resistance heating. All offer faster, more precise, and more material-efficient pathways to high-throughput characterization of UHT materials, but each carries trade-offs in implementation, measurement fidelity, and scalability. A common challenge that extends across techniques involves the avoidance of temperature gradients. For Joule heating, placing high-resistance interconnects in the grips helps minimize thermal gradients while reducing the likelihood of electroplastic effects in the specimen. Coupling this setup with UV digital image correlation and multi-spectral pyrometry enables temperature-dependent material properties to be measured, in many cases up to the melting temperature of the alloy. |