Study of Crack Growth of Transparent Materials Subjected to Laser Irradiation by Digital Holography

The crack growth of transparent materials after laser wavelength irradiation was studied. It is known that laser irradiation is used in many applications for the ablation of undesired material and/or coatings. The impact of laser irradiation on cracks was studied using the digital holography (DH) te...

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Bibliographic Details
Published in:Applied sciences 2022-08, Vol.12 (15), p.7799
Main Authors: Zhou, Wenjing, Liu, Yuhang, Chen, Zhenkai, Chen, Yao, Zhang, Hongbo, Yu, Yingjie, Tornari, Vivi
Format: Article
Language:English
Subjects:
Crack initiation
Crack propagation
Cultural heritage
digital holography
Experiments
Flaw detection
Holography
I.R. radiation
Infrared radiation
Irradiation
laser irradiation
Lasers
Light
Oil painting
photomechanical effects
Stress analysis
tip crack
transparent materials
Wavelengths
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Summary:The crack growth of transparent materials after laser wavelength irradiation was studied. It is known that laser irradiation is used in many applications for the ablation of undesired material and/or coatings. The impact of laser irradiation on cracks was studied using the digital holography (DH) technique. Transparent samples were irradiated using near-ultraviolet, visible, near-infrared, and infrared light. The DH system is able to detect cracks and crack growth of the transparent samples irradiated by a range of laser wavelengths. Results also show that light with infrared to near-infrared wavelengths has a great effect on crack growth. High-resolution photomechanical effects of laser irradiation on material expansion or/and generation of defects due to specific wavelengths are also illustrated. The DH system with a multispectral laser has practical applications for laser cleaning of painted artworks.
ISSN:2076-3417
2076-3417
DOI:10.3390/app12157799