バルクハウゼンノイズ解析による厚肉球状黒鉛鋳鉄の組織と靭性の評価
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概要
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The possibility of non-destructive evaluation of the metallurgical microstructures and fracture toughness in the ductile thick walled spheroidal graphite cast iron (i. e. so-called cask) was studied by using magnetic Barkhausen noise (BHN) analysis. BHN signal was detected through a contact type sensor set on the surface of Charpy impact type block specimen and analyzed by a digital spectrum analyzer. Ferrite matrix, graphite morphology and Charpy impact value at 233 K were investigated, and the correlations between these values and BHN were discussed. Main results are (1) Normalized low frequency intensity parameter (LFI) from Barkhausen noise spectrum depends on grain size of ferrite matrix. (2) Charpy impact value at 233 (K) depends on grain size of ferrite matrix. (3) The defined Barkhausen noise parameter (LFI) from spectrum can be correlated with Charpy impact value at 233 (K).
- 日本鋳造工学会の論文
日本鋳造工学会 | 論文
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