Effect of thermo-mechanical treatment on nano-structure of 9Cr-ODS steel

Oka, Hiroshi ; Tanno, Takashi ; Otsuka, Satoshi ; Yano, Yasuhide ; Kaito, Takeji ; Onuma, Masato*

Microstructural changes of 9Cr-ODS steel introduced by thermo-mechanical treatment (hot isostatic press (HIP), hot extrusion, and hot forge) were evaluated. The weight-ratio of residual ferrite phase reduced and the number density of nano-oxide particle decreased after the thermo-mechanical treatment. The change of number density and size of nano-oxide particle would affect the weight-ratio of residual ferrite phase because the formation of the residual ferrite phase is led by the pin effect of the nano-oxide particle.

Language	:	Japanese
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Meeting title	:	日本金属学会2015年春期(第156回)講演大会
Held date	:	2015/03
Location (city)	:	東京
Location (country)	:	日本
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Keywords	:	ODS鋼; HIP; SANS; HT-XRD
Research Facility	:	MMF(照射材料試験施設) ;構造物強度確性試験施設
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Registration No. : BB20142729
JAEA Abstracts No. :
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