中文摘要：

研究了基于量子点的荧光特性实时监测金属裂纹扩展的方法。标准金属试样上涂覆了添加量子点的环氧树脂膜,在试样加载拉伸过程中,出现金属裂纹的区域伴随明显亮线,光谱测试发现其荧光强度明显高于非裂纹区域。借助共聚焦显微镜可观测到裂纹宽度最小达7μm,比已知的其他无损检测方法的探测极限有了显著提高。

英文摘要：

This paper reported the real-time monitoring method of crack propagation in metals with quantum dots.Experimental results show that the crack of epoxy resin mixing with quantum dot exhibits a bright line at crack,and its fluorescence intensity in the crack area is much higher than that of non-crack parts.With the help of confocal microscopy,the crack width can be detected as low as7μm,stating that the detection limitation is greatly improved comparing with other non-destructive testing methods.