Experimental Study of Dynamic Strain on Coating Surface Based on Pulse Laser Discrete Scratching Technique

Fen, 施芬 Shi; Wei, 薛伟 Xue; Aixin, 冯爱新 Feng; Bin, 李彬 Li; Run, 杨润 Yang; Yi, 卢轶 Lu; Shuxin, 王术新 Wang; Zhenchun, 韩振春 Han

doi:10.3788/al20133303.0290

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“…Interiorly, He Pengfei et al [6] from Shanghai Jiaotong University probed into microscopic damages of composite microstructures under the irradiation of pulsed laser in 1994, explored the correlation between failure mechanism of interfacial bonding strength and interface cracking strength, proposed the laser detecting technique of discrete scratches based on above scientific achievements and made some progress. Shi Fen [7] and Shi Fen et al [8] delved into stress-strain characteristics of film-substrate system to concretely analyze the filmsubstrate's interfacial bonding status and influence rule on dynamic system strain by laser energy. Besides, an experimental research on the distribution law for residual stress of film-substrate system was also carried out.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research of Dynamic Response of Laser-Induced Film-Substrate System

Bao-yi¹,

Ai²,

Mao³

et al. 2016

MSCE

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Film-substrate's interfacial bonding strength is closely related to film quality. An excellent interfacial bonding strength is the premise for the well use of film. The laser detecting technique of discrete scratches based on laser shockwave effect is a new method, which can measure interfacial bonding strength. With this technique, film-substrate system is of transient load of different laser energy, the relation between the dynamic response characteristics of such film-substrate system and film-substrate's interfacial bonding strength is a core problem to be solved urgently. On this basis, this paper conducted research on the dynamic response characteristics of film-substrate system during laser loading process using detecting technique of PVDF patch sensor. Results show that under the irradiation of different laser energy, it can detect dynamic responses of theory models of different film-substrate system using PVDF patch sensor, wherein shockwave dynamic response and dynamic strain response are included. Laser energy and interfacial bonding strength are of a regular influence to the dynamic response of film-substrate system theory model.

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Section: Introductionmentioning

confidence: 99%