ばね鋼中における微小傷の高感度検出と傷形状を推定するのに有利なECTプローブの開発

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2017/05/01

タイトル(英語): Development of Advantageous ECT Probe for Highly Sensitive Detection of Microcrack in Spring Steel and Estimation of Crack Shape

著者名: 福岡　克弘（滋賀県立大学），長谷川　諒（滋賀県立大学）

著者名(英語): Katsuhiro Fukuoka (The University of Shiga Prefecture), Ryo Hasegawa (The University of Shiga Prefecture)

キーワード: 渦電流試験，ばね鋼，磁化，微小傷，有限要素法解析，磁気ノイズ　　eddy current testing (ECT)，spring steel，magnetization，microcrack，finite element method (FEM) analysis，magnetic noise

要約(英語): A high-speed and high-sensitive eddy current testing (ECT) system was developed for the inspection of spring steel materials in manufacturing lines. The permeability distribution of the steel materials affects inspection results and the signal-to-noise (S/N) ratio decreases. Therefore, magnetizing the materials is required to reduce the magnetic noise. In this research, the spring steel materials that have artificial microcracks (29∼114 μm depth) were magnetized and inspected to evaluate detection performance of a developed ECT probe. It was confirmed that the probe is able to detect the 40 μm depth crack with the S/N ratio of 3 or more. The detectivity of pitting corrosions was evaluated for the consideration about applicability of the probe in natural flaws. In addition, the permeability distribution around the crack in the magnetic saturation ECT was clarified with a finite element method (FEM) analysis.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.137 No.5 （2017） 特集：革新的な光応用技術

本誌掲載ページ: 304-310 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/137/5/137_304/_article/-char/ja/