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高張力鋼における応力腐食き裂の発生および成長に及ぼす前オーステナイト粒径の影響(<小特集>X線材料強度小特集)
http://hdl.handle.net/2297/12469
http://hdl.handle.net/2297/12469bacf0fc8-45e2-4c3b-add0-2c72b603b51f
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
TE-PR-HIROSE-Y-196.pdf (1.5 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2017-10-03 | |||||
| タイトル | ||||||
| タイトル | 高張力鋼における応力腐食き裂の発生および成長に及ぼす前オーステナイト粒径の影響(<小特集>X線材料強度小特集) | |||||
| タイトル | ||||||
| タイトル | Prior-Austenite Grain-Size Effect on Nucleation and Growth of Stress Corrosion Cracking in High Strength Steel(<Minor Special Issue>Minor Special Issue on X-Ray Study on Deformation and Fracture of Solid) | |||||
| 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 |
広瀬, 幸雄
× 広瀬, 幸雄× 田中, 啓介× 岡林, 邦夫 |
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| 提供者所属 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 金沢大学大学院自然科学研究科 | |||||
| 書誌情報 |
材料=Journal of the Society of Materials Science, Japan 巻 28, 号 306, p. 196-202, 発行日 1979-03-15 |
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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 | AN00096175 | |||||
| 出版者 | ||||||
| 出版者 | 日本材料学会 | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Stress corrosion tests were conducted on the blunt-notch compact tension specimens of quenched-and-tempered SNCM 8 steel having several different prior-austenite grain-sizes in a 3.5% N.aC1 solution environment. The effects of grain-size on the nucleation and growth of stress corrosion cracks were analysed from a viewpoint of fracture mechanics. The susceptivity of material to stress corrosion cracking was characterized by five quantities, i. e., the time to crack nucleation at the notch root, t~, the threshold stress intensity factor, K _ <ISCC>, the stress corrosion fracture toughness, Ksc, the crack growth rate, (da/dt)_<II>, and the stress intensity factor, (K) _<II>, at the middle point of the region II in crack growth curves. The results obtained are summarized as follows : (1) The crack nucleation life t_n was determined by the stress intensity factor Ko, the yield strength σ_Y and the notch root radius p as t_n = C [2K_0/(σ_Y√<πρ>) ]^m where C and m are constants independent of prior-austenite grain-size. The value of effective notch root radius obtained by substituting K_0=K_<ISCC> and t_n=240 hrs into the above equation was found to increase with grain size. (2) When the plastic zone ω was smaller than the grain size d, the K_<ISCC> Value was found to take a nearly constant value of 35 to 45 kg/mm^<3/2> For the cases of ω/d>1, the values of K_<ISCC> and (K)_<II> increased with decreasing yield strength while the value of (da/dt)_<II> decreased. The larger grain sized material showed lower (K)_<II> and higher (da/dt)_<II> values when compared at the same yield strength. (3) The values of Klscc and (K)_<II> Were higher and (da/dt)_<II> was lower in thin specimens than in thick specimens. The amount of microbranching of cracks was suggested to be a significant clue to the effects of grain size and specimen thickness on growth kinetics. | |||||
| 権利 | ||||||
| 権利情報 | 日本材料学会；本文データは日本材料学会の許諾に基づきCiNiiから複製したものである | |||||
| 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 | http://ci.nii.ac.jp/naid/110002298089/ | |||||
