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ECAP法により作製した超微細結晶粒を有する低炭素鋼の焼なまし熱処理にともなう組織変化と強度特性
http://hdl.handle.net/2297/36636
http://hdl.handle.net/2297/366366457aecd-fffb-4f99-be46-c0f1687bd60a
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
TE-PR-GOTOH-M-513.pdf (11.1 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2017-10-03 | |||||
| タイトル | ||||||
| タイトル | ECAP法により作製した超微細結晶粒を有する低炭素鋼の焼なまし熱処理にともなう組織変化と強度特性 | |||||
| タイトル | ||||||
| タイトル | Microstructural Changes by Annealing and Mechanical Properties of Ultra Fine-Grained Low Carbon Steels Processed by ECAP | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 著者 |
穐田, 竹男
× 穐田, 竹男× 後藤, 昌英× 北川, 和夫× 生水, 雅之× 広瀬, 幸雄 |
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| 書誌情報 |
Journal of the Society of Materials Science, Japan = 材料 巻 59, 号 7, p. 513-520, 発行日 2010-01-01 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0514-5163 | |||||
| NCID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA11556898 | |||||
| DOI | ||||||
| 関連タイプ | isIdenticalTo | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.2472/jsms.59.513 | |||||
| 出版者 | ||||||
| 出版者 | The Society of Materials Science, Japan = 日本材料学会 | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Microstructures and mechanical properties of ultra fine-grained low carbon steels fabricated by equal channel angular pressing (ECAP) were investigated. Several specimens statically annealed for 5 hours at temperatures of 773-873K were studied simultaneously. Electron back-scattering diffraction (EBSD) measurements were carried out for microstructure observation. Differential scanning calorimeter (DSC) curves were obtained for studying the thermal stability of specimens. The initial grain size of ∼10μm in the ferrite-pearlite steel was refined to ∼0.2μm by 4 passes of ECAP. The tensile strength of the as-ECAPed specimen was around 2 times higher than that of the initial normalized specimen, although the ductility decreased by half after the process. At annealing temperature of 773-823K, tensile strength and yield stress decreased as the average grain size of each specimen increased. However the grain growth by annealing was not significant. At annealing temperature of 873K, the nonuniform grain growth occurred suddenly, and as a result the tensile strength decreased. On the Hall-Petch relation diagram, the gradient of the diagram over the average grain size of 1mm was slightly different from that of under 1μm. In addition, the nonuniform radical grain growth at the temperature of 873K was in accord with the appearance of the exothermic peak in the DSC curves. The accumulation of the local strain in the 823K-annealed specimen was investigated by the kernel average misorientation (KAM) approach using EBSD, and it is suggested that accumulation of the local strain in the 823K-annealed specimen is one of the causes of the nonuniform radical grain growth at the temperature of 873K. | |||||
| 権利 | ||||||
| 権利情報 | Copyright © 2010 by The Society of Materials Science, Japan 日本材料学会 | |||||
| 著者版フラグ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| 関連URI | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://www.jstage.jst.go.jp/browse/jsms | |||||
| 関連URI | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://www.jsms.jp/ | |||||
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| 識別子タイプ | URI | |||||
| 関連識別子 | http://www.jsms.jp/kaishi/tensai.htm | |||||
