強冷間圧延によりヘテロナノ組織を発達させたSUS316LNステンレス鋼板材の疲労特性
Fatigue behaviors of SUS316LN austenitic stainless steel with heterogeneous nano-structure developed by heavy cold rolling have been investigated in this study. The tensile strength and the elongation to fracture in the heterogeneous nano-structure SUS316LN were 1552 MPa and 10%, respectively. The f...
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| Published in | 鉄と鋼 Vol. 106; no. 7; pp. 507 - 516 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | Japanese |
| Published |
一般社団法人 日本鉄鋼協会
2020
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0021-1575 1883-2954 |
| DOI | 10.2355/tetsutohagane.TETSU-2019-130 |
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| Abstract | Fatigue behaviors of SUS316LN austenitic stainless steel with heterogeneous nano-structure developed by heavy cold rolling have been investigated in this study. The tensile strength and the elongation to fracture in the heterogeneous nano-structure SUS316LN were 1552 MPa and 10%, respectively. The fatigue strength of the heterogeneous nano-structure SUS316LN, which was defined at 107 cycles, reached double of fatigue strength of conventional austenitic stainless steels. The improvement of fatigue strength can be connected with ultimate tensile strength in the heterogeneous nano-structure SUS316LN. Fish-eye fractures, in which crack initiated at Al2O3 inclusions, were clearly observed on the fracture surfaces. The crack propagation rate was measured based on the striation intervals on fracture surface, the analysis of crack propagation rate revealed that the cracks tend to propagate difficult to sheet thickness direction due to lamella structure whose grain boundaries are low misorientation angles. The fatigue lives before and after crack initiation were also estimated by using the number of cycles at fracture and the crack propagation rate. It was found that most of fatigue life was spent before crack initiation. Therefore, fatigue strength would be able to improve by reducing the number and size of inclusion particles. |
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| AbstractList | Fatigue behaviors of SUS316LN austenitic stainless steel with heterogeneous nano-structure developed by heavy cold rolling have been investigated in this study. The tensile strength and the elongation to fracture in the heterogeneous nano-structure SUS316LN were 1552 MPa and 10%, respectively. The fatigue strength of the heterogeneous nano-structure SUS316LN, which was defined at 107 cycles, reached double of fatigue strength of conventional austenitic stainless steels. The improvement of fatigue strength can be connected with ultimate tensile strength in the heterogeneous nano-structure SUS316LN. Fish-eye fractures, in which crack initiated at Al2O3 inclusions, were clearly observed on the fracture surfaces. The crack propagation rate was measured based on the striation intervals on fracture surface, the analysis of crack propagation rate revealed that the cracks tend to propagate difficult to sheet thickness direction due to lamella structure whose grain boundaries are low misorientation angles. The fatigue lives before and after crack initiation were also estimated by using the number of cycles at fracture and the crack propagation rate. It was found that most of fatigue life was spent before crack initiation. Therefore, fatigue strength would be able to improve by reducing the number and size of inclusion particles. |
| Author | 渡邊, 千尋 三浦, 博己 岩間, 翔平 小林, 正和 青柳, 吉輝 |
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| References_xml | – reference: 25) T. Hanlon, E.D. Tabachnikova and S. Suresh: Int. J. Fatigue, 27(2005), 1147. – reference: 14) Y. Yamazaki, M. Kobayashi, Y. Todaka, C. Watanabe, Y. Aoyagi and H. Miura: Tetsu-to-Hagané, 105(2019), 272 (in Japanese). – reference: 3) Y. Saito, H. Utsunomiya, N. Tsuji and T. Sakai: Acta Mater., 47(1999), 579. – reference: 6) H. Miura, M. Kobayashi, K. Maki and Y. Ito: J. Jpn. Inst. Copper, 55(2016), 190 (in Japanese). – reference: 18) J. Liu, X.T. Deng, L. Huang and Z.D. Wang: Mater. Sci. Eng. A, 733(2018), 128. – reference: 8) H. Miura, M. Kobayashi, Y. Todaka, C. Watanabe and Y. Aoyagi: J. Jpn. Inst. Met. Mater., 81(2017), 536 (in Japanese). – reference: 11) C. Watanabe, S. Kobayashi, Y. Aoyagi, Y. Todaka, M. Kobayashi, N. Sugiura, N. Yoshinaga and H. Miura: ISIJ Int., 60(2020), 582. – reference: 22) N. Maruyama, D. Mori, S. Hiromoto, K. Kanazawa and M. Nakamura: Corros. Sci., 53(2011), 2222. – reference: 9) H. Miura, Y. Iwama and M. Kobayashi: J. Jpn. Inst. Copper, 57(2018), 59 (in Japanese). – reference: 10) C. Watanabe, S. Kobayashi, Y. Aoyagi, Y. Todaka, M. Kobayashi, N. Sugiura, N. Yoshinaga and H. Miura: Tetsu-to-Hagané, 105(2019), 254 (in Japanese). – reference: 2) R.Z. Valiev, Y.V. Ivanisenko, E.F. Rauch and B. Baudelet: Acta Mater., 44(1996), 4705. – reference: 27) W.B. Hutchinson, K. Ushioda and G. Runnsjö: Mater. Sci. Technol., 1(1985), 728. – reference: 30) Committee on Fracture Mechanics, The Society of Materials Science, Japan: Stress Intensity Factor Handbook, Vol.2, ed. by Y.Murakami, Pergamon press, Oxford, (1987), 712. – reference: 5) S. Lee, K. Tazoe, I.F. Mohamed and Z. Horita: Mater. Sci. Eng. A, 628(2015), 56. – reference: 19) M.Tanaka and K.Asakura: Kikaizairyou 2nd ed., Kyoritsu Shuppan, (1997), 140. – reference: 7) H. Miura, M. Kobayashi, Y. Todaka, C. Watanabe, Y. Aoyagi, N. Sugiura and N. Yoshinaga: Scr. Mater., 133(2017), 33. – reference: 16) A. Di Schino and J.M. Kenny: Mater. Lett., 57(2003), 3182. – reference: 1) M. Furukawa, Y. Iwahashi, Z. Horita, M. Nemoto and T.G. Langdon: Mater. Sci. Eng. A, 257(1998), 328. – reference: 28) A.ul-Haq, H.Weiland and H.-J.Bunge: Mater. Sci. Technol., 10(1994), 289. – reference: 29) J.C.Newman and I.S.Raju: NASA Technical Memorandum 85793, NASA Langley Research Center, Hampton, VA, (1984). – reference: 15) T. Sawai, S. Matsuoka and K. Tuzaki: Tetsu-to-Hagané, 89(2003), 726 (in Japanese). – reference: 20) W.D.Callister Jr. and D.G.Rethwisch: Materals Science and Engineering 9th ed., John Wiley & Sons (Asia), Hoboken, NJ, (2015), 438. – reference: 4) H. Miura, Y. Nakano and T. Sakai: Mater. Trans., 48(2007), 2539. – reference: 17) H. Ueno, K. Kaihata, Y. Kaneko, S. Hashimoto and A. Vingradov: Acta Mater., 59(2011), 7060. – reference: 12) Y. Aoyagi, A. Sagara, C. Watanabe, M. Kobayashi, Y. Todaka and H. Miura: Mater. Sci. Forum, 941(2018), 212. – reference: 21) S.Lampman: Fatigue and Fracture, ASM Handbook, ed. by S.R.Lampman et al., ASM International, Materials Park, OH, USA, 19(1996), 712. – reference: 13) Y. Aoyagi, C. Watanabe, M. Kobayashi, Y. Todaka and H. Miura: Tetsu-to-Hagané, 105(2019), 262 (in Japanese). – reference: 24) H. Miura, X. Tong, M. Kato and T. Mori: J. Jpn. Inst. Met., 54(1990), 1165 (in Japanese). – reference: 23) S. Kobayashi, S. Ogou and S. Tsurekawa: Mater. Trans., 60(2019), 623. – reference: 26) Y. Estrin and A. Vinogradov: Int. J. Fatigue, 32(2010), 898. |
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| Snippet | Fatigue behaviors of SUS316LN austenitic stainless steel with heterogeneous nano-structure developed by heavy cold rolling have been investigated in this... |
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| SubjectTerms | austenitic stainless steels fatigue fracture heavy cold rolling heterogeneous nano-structure high strength |
| Title | 強冷間圧延によりヘテロナノ組織を発達させたSUS316LNステンレス鋼板材の疲労特性 |
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