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基于FSTFM技术的焊缝表面裂纹的成像检测

于朋,刚铁,孙昌立

于朋,刚铁,孙昌立. 基于FSTFM技术的焊缝表面裂纹的成像检测[J]. 焊接学报, 2018, 39(2). DOI: 10.12073/j.hjxb.2018390032
引用本文: 于朋,刚铁,孙昌立. 基于FSTFM技术的焊缝表面裂纹的成像检测[J]. 焊接学报, 2018, 39(2). DOI: 10.12073/j.hjxb.2018390032

基于FSTFM技术的焊缝表面裂纹的成像检测

  • 摘要: Full-Skip TFM(FSTFM)是在全聚焦成像技术(TFM)的基础上发展起来的一种超声相控阵后处理成像技术. 文中分别采用TFM,FSTFM这两种算法分别对典型的对接焊缝模拟试件中的上表面微小裂纹(垂直表面扩展,深度约1 mm)进行了成像检测. 结果表明,在TFM的成像中,无法观察到裂纹的存在;而在FSTFM的成像中,裂纹的根部和尖端成像清晰可见. 同时根据FSTFM的成像结果,测量出裂纹的扩展深度,且具有较小的误差. 另外,文中通过试验验证了FSTFM对于有余高的对接焊缝的上表面微小裂纹的成像检测同样适用.
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  • 收稿日期:  2017-04-25

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