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Title :窒化したSS400の疲労特性と転位組織
Title alternative :Fatigue Propeties and Dislocation Structures of Nitrided SS 400
Authors :兼城, 英夫
下地, 義光
真壁, 朝敏
真喜志, 隆
片桐, 一宗
Authors alternative :Kaneshiro, Hideo
Shimoji, Yoshimitu
Makabe, Chobin
Makishi, Takashi
Katagiri, Kazumune
Issue Date :25-Apr-1999
Abstract :Fatigue properties of the nitrided SS 400 are investigated on the basis of the observation of dislocation structures, surface topography and fracture surface by means of optical and electron microscopy. Both slip bands and dislocation structures during stress cycling are not formed in the compound layer. The dislocation morphology of the diffusion layer is composed of the untangled and uniformly distributed dislocations and the clusters of the dislocation dipoles at lower stress amplitude, but well defined cell structures at higher stress amplitude. It is also found that the fatigue cracks of the nitrided specimen are initiated without the formation of slip bands and the separation between the compound layer and the diffusion layer occurs during cyclic loading. On the basis of these observations, a mechanism of fatigue fracture for the nitrided SS 400 is proposed.
Type Local :雑誌掲載論文
ISSN :03875008
Publisher :日本機械学会
URI :http://hdl.handle.net/20.500.12000/217
Citation :日本機械学会論文集. A編 = Transactions of the Japan Society of Mechanical Engineers. A Vol.65 no.632 p.116 -123
Appears in Collections:Peer-reviewed Journal Articles (Faculty of Engineering)

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