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以18.8 mm的TC4钛合金板材为原料,利用超声波探伤检测板材时局部出现了强度较高的杂波现象,对具有不同超声波探伤杂波水平区域的显微组织进行对比。结果表明,超声波无损检测钛合金时在材料内部产生的噪音强度高于在材料表面产生的强度。探伤杂波水平较高区域呈现出明显的显微组织不均匀性,结合超声波探伤原理分析得出粗大的α相是产生杂波的根本原因。
Using 18.8 mm TC4 titanium alloy plate as raw material, the phenomenon of high-intensity clutter appeared locally by using ultrasonic flaw detection, and the microstructure with different ultrasonic flaw detection levels was compared. The results show that the intensity of noise generated inside the material by ultrasonic nondestructive testing of titanium alloy is higher than that of the surface of the material. The area with high level of flaw detection shows obvious microstructure heterogeneity. Combined with the principle of ultrasonic flaw detection, it is concluded that the coarse α phase is the root cause of clutter.