Microstructure classification of γ-TiAl alloy using an MLP deep learning analysis model of LIBS spectra

Guangyuan Shi, Yinghao Wang, Yuyang Mu, Wuyang Wang, Yuntao Zhang, Minchao Cui

科研成果: 书/报告/会议事项章节会议稿件同行评审

摘要

This study proposes a new strategy to accurately classify γ-TiAl samples with different microstructures using laser-induced breakdown spectroscopy (LIBS) combined with deep learning techniques. We first observed the microstructure of six groups of γ-TiAl treated with different solid solution temperatures and found that the percentage of lamellae increased with increasing temperature, while the percentage of γ phase substantially decreased. Next, the elemental characteristic spectral lines were collected by a coaxial acquisition device. Then we performed baseline correction and normalization on the LIBS spectra to eliminate the background signals. Principal Component Analysis (PCA) was then used to reduce the dimensionality to simplify the data structure. Finally, the processed data were fed into three different deep learning models, namely, Multilayer Perceptron (MLP), Long Short-Term Memory Network (LSTM), and Convolutional Neural Network (CNN), for training and classification. The classification accuracy using MLP, LSTM, and CNN was 83.33%, 81.87%, and 80.42%, respectively. The effect of material microstructure characterization by LIBS spectroscopy combined with the PCA-MLP model is particularly remarkable. This study provides a new solution for the rapid analysis of microstructures of engineering materials.

源语言英语
主期刊名AOPC 2024
主期刊副标题Optical Spectroscopy and Applications
编辑Zongyin Yang
出版商SPIE
ISBN(电子版)9781510687776
DOI
出版状态已出版 - 2024
活动2024 Applied Optics and Photonics China: Optical Spectroscopy and Applications, AOPC 2024 - Beijing, 中国
期限: 23 7月 202426 7月 2024

出版系列

姓名Proceedings of SPIE - The International Society for Optical Engineering
13494
ISSN(印刷版)0277-786X
ISSN(电子版)1996-756X

会议

会议2024 Applied Optics and Photonics China: Optical Spectroscopy and Applications, AOPC 2024
国家/地区中国
Beijing
时期23/07/2426/07/24

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