TY - GEN
T1 - Observation of crack propagation in PEEK polymer bearings under water-lubricated conditions
AU - Koike, Hitonobu
AU - Kida, Katsuyuki
AU - Honda, Takashi
AU - Mizobe, Koshiro
AU - Oyama, Shunsuke
AU - Rozwadowska, Justyna
AU - Kashima, Yuji
AU - Kanemasu, Kenji
PY - 2012
Y1 - 2012
N2 - Radial ball bearings made of metal, ceramics and plastics are commonly used as important components in various types of industrial machinery. Due to the latest markets demands for elements capable of withstanding e.g. corrosive environment, metallic bearings are being gradually replaced by components produced from high performance engineering plastic polymers. In order to investigate the failure mechanism of polymer bearings and further improve their performance in practical applications in an underwater environment, in this research crack propagation in Poly-ether-ether-ketone (PEEK) was studied by rolling contact fatigue (RCF) testing under water. Crack propagation in the inner ring raceway surface and subsurface areas of PEEK bearings after testing was observed by a laser confocal microscope. Cracks and flaking failure were found on the bearing raceway surface. From the RCF tests results, it was found that the detected cracks could be divided into three groups: Main Surface Cracks, Semi-circular Cracks and Main Subsurface Cracks. It is concluded that flaking occurs on the inner ring raceway due to the fusion of semi-circular cracks and a main subsurface crack.
AB - Radial ball bearings made of metal, ceramics and plastics are commonly used as important components in various types of industrial machinery. Due to the latest markets demands for elements capable of withstanding e.g. corrosive environment, metallic bearings are being gradually replaced by components produced from high performance engineering plastic polymers. In order to investigate the failure mechanism of polymer bearings and further improve their performance in practical applications in an underwater environment, in this research crack propagation in Poly-ether-ether-ketone (PEEK) was studied by rolling contact fatigue (RCF) testing under water. Crack propagation in the inner ring raceway surface and subsurface areas of PEEK bearings after testing was observed by a laser confocal microscope. Cracks and flaking failure were found on the bearing raceway surface. From the RCF tests results, it was found that the detected cracks could be divided into three groups: Main Surface Cracks, Semi-circular Cracks and Main Subsurface Cracks. It is concluded that flaking occurs on the inner ring raceway due to the fusion of semi-circular cracks and a main subsurface crack.
KW - Crack
KW - PEEK
KW - Plastic radial bearing
KW - Rolling contact fatigue
KW - Water lubrication
UR - http://www.scopus.com/inward/record.url?scp=84869424785&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMR.566.109
DO - 10.4028/www.scientific.net/AMR.566.109
M3 - 会議への寄与
AN - SCOPUS:84869424785
SN - 9783037854709
T3 - Advanced Materials Research
SP - 109
EP - 114
BT - Machine Design and Manufacturing Engineering
T2 - 2012 International Conference on Machine Design and Manufacturing Engineering, ICMDME 2012
Y2 - 11 May 2012 through 12 May 2012
ER -