The method to quantitatively detect the sizes and depths of subsurface defects in metal material was introduced by using pulsed heating infrared thermography non destructive testing technology. Some experimental results were given and analyzed.
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薛书文 宗明成.利用红外热成像技术检测金属内部近表缺陷[J].红外与毫米波学报,1998,17(6):424~428]. XUE Shu Wen ZONG Ming Cheng DING Tie Ying TANG Hui Jun. PULSED VIDEO IR THERMOGRAPHY TESTING OF SUBSURFACE DEFECTS IN METAL[J]. J. Infrared Millim. Waves,1998,17(6):424~428.]