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介绍了衍射时差法(TOFD)检测中涉及到的两个盲区问题,表面盲区和底面盲区,分别就表面盲区和底面盲区在TOFD盲区试块上进行实验验证,并分析了盲区试块上扫查的TOFD图谱。
This paper introduces two blind area problems, surface blind area and bottom blind area involved in TOFD detection. The blind area on the surface and the blind area on the TOFD are validated by experiments. TOFD map.