TY - JOUR
T1 - SEM Observation of the Vibratory Cavitation-Fracture Mode During the Incubation Period and the Small Roughness Effect
AU - Ahmed, Shemy Mohamed
AU - Hokkirigawa, Kazuo
AU - Oba, Risaburo
AU - Kikuchi, Kinya
PY - 1990
Y1 - 1990
N2 - 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.
AB - 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.
KW - Bubble
KW - Cavitation
KW - Erosion
KW - Multi-phase Flow
KW - Roughness
KW - Turbomachinery
UR - http://www.scopus.com/inward/record.url?scp=0025457266&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0025457266&partnerID=8YFLogxK
U2 - 10.1299/kikaib.56.1876
DO - 10.1299/kikaib.56.1876
M3 - Article
AN - SCOPUS:0025457266
VL - 56
SP - 1876
EP - 1882
JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
SN - 0387-5016
IS - 527
ER -