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Title: 18Cr–9Ni–3Cu–Nb–N鋼のクリープ変形に伴う組織変化とそのクリープ破壊への影響
Other Titles: Effect of Microstructural Change on Creep Rupture during Creep Deformation in 18Cr-9Ni-3Cu-Nb-N Steel
Authors: 光原, 昌寿1 Browse this author
池田, 賢一2 Browse this author →KAKEN DB
中島, 英治3 Browse this author
早川, 弘之4 Browse this author
楠元, 淳一5 Browse this author
金谷, 章宏6 Browse this author
Authors(alt): Mitsuhara, Masatoshi1
Ikeda, Ken-ichi2
Nakashima, Hideharu3
Hayakawa, Hiroyuki4
Kusumoto, Jun-ichi5
Kanaya, Akihiro6
Keywords: 18Cr-9Ni-3Cu-Nb-N steel
creep deformation
creep rupture
cystal orientation
Schmid factor
Issue Date: 1-Aug-2008
Publisher: 日本鉄鋼協会
Journal Title: 鉄と鋼
Volume: 94
Issue: 8
Start Page: 299
End Page: 304
Publisher DOI: 10.2355/tetsutohagane.94.299
Abstract: 18Cr–9Ni–3Cu–Nb–N steel has the highest creep strength in the austenitic heat-resistant steels. It is expected as the component of the future thermal power plants. In order to clarify the mechanism of creep strengthening and creep rupture for the 18Cr–9Ni–3Cu–Nb–N steel, the creep test and the microstructural observations using electron microscopy were carried out. Seamless pipe was used as the sample because the initial microstructure for the sample conformed to the one for steels in the plants. From the TEM observation, fine NbX and Cu particles were formed in the austenite grains. The pinning effect by these particles is effective for the creep strengthening. In the regard to the microstructural change during the creep deformation, the crystal orientation rotations were observed using SEM-OIM. In the crystal grains rotated during the creep deformation, ‹001› or ‹111› was oriented to the tensile direction. Many boundaries were cracked due to these crystal rotations. This means that the creep rupture is occurred by the difference of the plastic deformation behavior between the grains oriented ‹001› to the tensile direction and the grains oriented ‹111› to it.
Rights: 著作権は日本鉄鋼協会にある
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 池田 賢一

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