A novel real-time monitoring approach for surface integrity in laser shock peening: spectro-acoustic data fusion

IF 5 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2025-09-29 DOI:10.1016/j.optlastec.2025.113990

Guangyuan Shi , Haoyu Guan , Yuanbin Wang , Nan Ma , Minchao Cui , Ming Luo

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Abstract

A spectro-acoustic data fusion approach was employed for real-time monitoring of surface integrity during the laser shock peening (LSP) process, revealing the mechanism of plasma physical field interaction. The apparent plasma temperature and electron density were quantified through spectral analysis, while the propagation behavior of the shock wave was analyzed using the time–frequency characteristics of the airborne acoustic signal. A multivariate regression model was developed using the spectral intensity ratio of Hα/N II 500.515 nm and the peak-to-peak amplitude of the acoustic wave. This model achieved high-precision prediction of surface residual stress (R² = 0.944) and Vickers hardness (R² = 0.946) for γ-TiAl alloy, improving by over 5 % compared to single-signal regression models. A spectro-acoustic fusion diagnostic model incorporating a cross-modal attention mechanism within the Transformer architecture was established, achieving a prediction accuracy of 99.52 %. This study provides significant theoretical and practical contributions to the adaptive LSP of critical aerospace components.

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激光冲击强化表面完整性实时监测新方法：光谱-声学数据融合

采用光谱-声学数据融合方法实时监测激光冲击强化过程中的表面完整性，揭示了等离子体物理场相互作用的机制。通过谱分析量化了等离子体的表观温度和电子密度，利用机载声信号的时频特性分析了冲击波的传播特性。利用Hα/Nⅱ光谱强度比500.515 nm和声波峰峰幅值建立多元回归模型。该模型实现了γ-TiAl合金表面残余应力（R2 = 0.944）和维氏硬度（R2 = 0.946）的高精度预测，与单信号回归模型相比提高了5%以上。在Transformer架构中建立了一个包含跨模态注意机制的光谱-声学融合诊断模型，预测准确率达到99.52%。该研究为航空航天关键部件的自适应LSP提供了重要的理论和实践贡献。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems