SEM Observation of the Vibratory Cavitation-Fracture Mode During the Incubation Period and the Small Roughness Effect

Shemy Mohamed Ahmed; Kazuo Hokkirigawa; Risaburo Oba; Kinya Kikuchi

doi:10.1299/kikaib.56.1876

SEM Observation of the Vibratory Cavitation-Fracture Mode During the Incubation Period and the Small Roughness Effect

Shemy Mohamed Ahmed, Kazuo Hokkirigawa, Risaburo Oba, Kinya Kikuchi

Research output: Contribution to journal › Article

3 Citations (Scopus)

Abstract

Vibratory-erosion tests on a typical ductile material, 304 stainless steel, were carried out under a specified condition of uniform sitation-nuclei-size distribution. We systematically investigated the behavior of the fracture mode on a smooth surface one figure smaller in roughness than the ASTM recommended value, as well as small roughness effects in the development and/or propagation of cracks and particle fall-off, in the second stage of the incubation period, by means of a scanning electron microscope. It is clear that the mode is fatigue and ductile fracture, and also that small roughness plays an important role in development and/or propagation of the cracks and also in microscopic removals, which shorten the incubation period.

Original language	English
Pages (from-to)	1876-1882
Number of pages	7
Journal	Transactions of the Japan Society of Mechanical Engineers Series B
Volume	56
Issue number	527
DOIs	https://doi.org/10.1299/kikaib.56.1876
Publication status	Published - 1990 Jan 1
Externally published	Yes

Keywords

Bubble
Cavitation
Erosion
Multi-phase Flow
Roughness
Turbomachinery

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering

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Ahmed, S. M., Hokkirigawa, K., Oba, R., & Kikuchi, K. (1990). SEM Observation of the Vibratory Cavitation-Fracture Mode During the Incubation Period and the Small Roughness Effect. Transactions of the Japan Society of Mechanical Engineers Series B, 56(527), 1876-1882. https://doi.org/10.1299/kikaib.56.1876

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