@article{oai:toyama.repo.nii.ac.jp:00003122,
 author = {魯, 連涛 and 塩澤, 和章},
 issue = {684},
 journal = {日本機械学會論文集. A編 = Transactions of the Japan Society of Mechanical Engineers. A},
 month = {Aug},
 note = {application/pdf, Effect of surface treatment on fatigue behavior in gigacycle regime was investigated in order to clarify the duplex S-N curve characteristics. A cantilever-type rotating-bending fatigue tests were performed in laboratory air at room temperature using hour-glass-shaped specimen of high speed tool steel, JIS SKH 51 with four kinds of surface treatment conditions, such as grind-stone polishing, emery-paper polishing, electro-polishing and plasma-nitriding. The fatigue limit of surface failure mode depended on compressive residual stress value on specimen surface. On the other hand, no difference in fatigue life controlled by subsurface crack initiation was observed among four kinds of surface-treated specimen in high cycle region. Fatigue crack initiation site changed from the surface of untreated specimen to the subsurface of the specimen because of hardening and compressive residual stress with plasma-nitriding in the region of high-stress amplitude. It is suggested that the S-N curve corresponding to internal failure mode is as inherent in the material, as compared with that the S-N curve of surface failure mode is affected by surface conditions. It was pointed out through the detailed measurement of crack initiation area that the formation of GBF (granular-bright-facet) around an inclusion controls the internal failure in long-life fatigue regime., Article},
 pages = {1195--1202},
 title = {高速度工具鋼SKH51の超長寿命域の疲労挙動に及ぼす表面処理の影響},
 volume = {69},
 year = {2003}
}