Quantitative Non-Destructive Testing of Metallic Foam Based on Direct Current Potential Drop Method
Quantitative Non-Destructive Testing of Metallic Foam Based on Direct Current Potential Drop Method
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DOI：
10.1109/tmag.2011.2172679
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发表时间：
2012-01
影响因子：
2.1
通讯作者：
Jing Zhang;Shejuan Xie;Xiaojuan Wang;Yong Li;Zhenmao Chen
中科院分区：
文献类型：
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作者：
Jing Zhang;Shejuan Xie;Xiaojuan Wang;Yong Li;Zhenmao Chen
为了检测泡沫金属中的孔洞缺陷并预测其尺寸，提出了一种基于直流电位降（DCPD）技术的定量无损检测（NDT）方法。首先，提出了一种高效的正演分析方法来模拟DCPD信号。为了获得用于缺陷重构的测量信号，制备了具有不同尺寸缺陷的实际泡沫铝试件，并利用DCPD测试系统对其进行了检测。第三，提出并实现了一种基于模型优化的泡沫金属孔洞缺陷尺寸反分析方法。通过对模拟和实测DCPD信号的反演，验证了正、逆分析方案对泡沫金属DCPD定量评价的有效性。
To detect cavity defects in metallic foam and to predict its size, a quantitative nondestructive testing (NDT) method based on the direct current potential drop (DCPD) technique was proposed and validated in this study. At first, an efficient forward analysis scheme was introduced to simulate the DCPD signals. In order to obtain measured signals for defect reconstruction, specimens of practical aluminum metal foam with defects of different sizes were fabricated and inspected then by using a DCPD testing system. Third, an inverse analysis scheme in model based optimization category was proposed and implemented for sizing cavity defects in the metal foam. Through inversion of both simulated and measured DCPD signals, the validity of both the forward and the inverse analysis schemes was demonstrated for the quantitative DCPD evaluation of the metallic foam.