The effect of non-isothermal treatment in oxygen-containing air, via heating rates of 10, 50, and 1000 °C/min until 1000 °C followed by furnace cooling to room temperature on oxides formed on directed laser energy additively fabricated IN718 was studied. Another set of samples heated up to 1000 °C using the same heating rates were isothermally held at 1000 °C for 1 hr followed by furnace cooling to room temperature. X-ray photoelectron spectroscopy indicated the presence of NiO on samples only heated at 1000 °C/min. Also, results indicated the absence of Fe-oxides on non-isothermally treated samples, irrespective of heating rate. However, isothermal treatment confirmed the presence of NiO on all samples and Fe-oxides on samples heated via 50 and 1000 °C/min. The durations in complement with the kinetics of the thermal treatments influenced oxide evolution in the samples. Such an experimental approach was adopted to study the material response under dynamic short duration-high temperature oxidation.

研究了在含氧空气中通过 10、50 和 1000 °C/min 的加热速率进行非等温处理直到 1000 °C，然后炉冷至室温对在定向激光能增材制造的 IN718 上形成的氧化物的影响. 使用相同加热速率加热至 1000°C 的另一组样品在 1000°C 下等温保持 1 小时，然后在炉中冷却至室温。X 射线光电子能谱表明仅以 1000 °C/min 加热的样品上存在 NiO。此外，结果表明，无论加热速率如何，未经等温处理的样品均不存在 Fe 氧化物。然而，等温处理证实了所有样品上都存在 NiO，通过 50 和 1000 °C/min 加热的样品上存在 Fe 氧化物。与热处理动力学互补的持续时间影响样品中的氧化物演化。采用这种实验方法来研究动态短时高温氧化下的材料响应。