Resonant ultrasound spectroscopy was utilized to determine the mechanical properties of a planar interface between a cold-sprayed iron deposit and an aluminum alloy substrate. The measurements were done at room temperature and with a thermal cycle from room temperature to 500 °C. The properties of the interface were assessed by analyzing the resonant frequencies of a sandwich-like sample by means of a numerical model. While the as-sprayed deposit at the room temperature exhibited a perfect adhesion to the substrate, the thermal cycle led to deterioration of the properties due to precipitation of FeAl3 along the interface and subsequent cracking. The modal analysis enabled localization of the damage zone along the interfaces and simulating its temperature evolution during the cooling run.

中文翻译：

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用激光共振超声光谱表征冷喷涂沉积物的结合质量

共振超声光谱用于确定冷喷涂铁沉积物和铝合金基材之间平面界面的机械性能。测量是在室温下进行的，并具有从室温到 500 °C 的热循环。通过数值模型分析三明治样样品的共振频率来评估界面的特性。虽然在室温下喷涂后的沉积物对基材表现出完美的附着力，但由于 FeAl3 沿界面析出和随后的开裂，热循环导致性能劣化。模态分析能够沿着界面定位损伤区域，并模拟冷却过程中的温度演变。