脱落粉形成からみたキャビテーション壊食機構の検討と壊食量の評価

Material type: 文書・図像類

Author: 服部, 修次ほか

Publisher: 社団法人日本機械学会

Publication date: 1999-02-25

Material Format: Digital

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Note (General)：: Cavitation erosion mechanisms were studied through the observation of erosion particles for carbon steels. In the initial period and the incubation pe...

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Material Type: 文書・図像類
Title: 脱落粉形成からみたキャビテーション壊食機構の検討と壊食量の評価
Author/Editor: 服部, 修次
中尾, 栄作
山岡, 龍
岡田, 庸敬
HATTORI, Shuji
NAKAO, Eisaku
YAMAOKA, Ryu
OKADA, Tsunenori
Author Heading: 服部, 修次
中尾, 栄作
山岡, 龍
岡田, 庸敬
HATTORI, Shuji
NAKAO, Eisaku
YAMAOKA, Ryu
OKADA, Tsunenori
Publication, Distribution, etc.: 社団法人日本機械学会
Publication Date: 1999-02-25
Publication Date (W3CDTF): 1999-02-25
Alternative Title: Cavitation Erosion Mechanisms and Its Quantitative Evaluation Based on Erosion Particles
Periodical title: 日本機械学会論文集(A編)
No. or year of volume/issue: 65 630
Volume: 65
Issue: 630
Pages: 393-399
Text Language Code: jpn
Subject Heading: Cavitation Erosion
Crack Propagation
Iron and Steel
Nonferrous Metal
Cavitation
Erosion Particle
Target Audience: 一般
Note (General): Cavitation erosion mechanisms were studied through the observation of erosion particles for carbon steels. In the initial period and the incubation period, many small sharply-edged particles were produced by single impact loads. In the accumulation period and the steady-state period, large striated particles were observed due to cyclic loads. The volume fraction of fatigue fracture is 70% to 80% in these periods incubation pure copper and pure aluminum. The exponent of the crack growth rate observed on the cross section of the eroded specimen is almost the same as that obtained from a regular fatigue test. The fatigue crack growth rate for many metals depends on a reciprocal of the square of Young's modulus(l/E^2). The particles fall off from the tip of uneven surface. The maximum diameter of erosion particle decreases inversely to the square root of Vickers hardness (1/HV^<1/2>). thus the volume is proportional to 1/HV^<3/2>. Therefore, the volume loss rate in the steadystate period corresponds well with the 1/(HV^<3/2>・E^2). It was concluded that cavitation erosion can be evaluated in the terms of the material hardness and the fatigue crack growth.
Access Restrictions: 限定公開
Rights (production): 社団法人日本機械学会
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 福井大学 : 福井大学学術機関リポジトリ