| 1. |
Yelm Okuyama, Masaki Tanaka and Tatsuya Morikawa, Temperature Independences of Fatigue Crack Growth in Ti-0.49mass%O, Materials Transactions, 2022.05. |
| 2. |
S. Yamasaki, T. Morikawa, M. Tanaka, Y. Watanabe, M. Yamashita, S. Izumi, Evaluation of Cleavage Fracture Behavior of C14Fe2W Laves Phase by First-principles Calculations and Crystal Orientation Analysis, ISIJ Int., 2022.05. |
| 3. |
J.Shimamura, T.Morikawa, S.Yamasaki, M.Tanaka, Sulfide Stress Cracking (SSC) of Low Alloy Linepipe Steels in Low H2S Content Sour Environment, ISIJ Inter., 2022.10. |
| 4. |
T.MORIKAWA, R.KUROSAKA, M.TANAKA, T.ICHIE and K. MURAKAMI, Strain Distribution Analysis Using Precise Markers in Cold-Rolled Ultra-Low Carbon Steel, ISIJ Inter., 2022.10. |
| 5. |
T.MORIKAWA, R.KUROSAKA, M.TANAKA, T.ICHIE and K. MURAKAMI, Grain Subdivision Mechanism For Constructing Lamellar Microstructure In Cold-Rolled Ultra-Low Carbon Steel, ISIJ Inter., 62, 2, 335-342, 2022.02.  |
| 6. |
T.Suzuki, M.Tanaka, T.Morikawa, J.Fujise and T.Ono, Tensile Deformation of Si Single Crystals with Easy Glide Orientation, Mater.Trans., 62, 7, 975-981, 2021.07. |
| 7. |
T.SAKAMAKI, M.TANAKA, T.MORIKAWA, H.NAKO and S.NANBA, Brittle-to-ductile Transition in Martensite – Bainite Steel, ISIJ Inter., 61, 7, 2167-2175, 2021.07. |
| 8. |
M.Tanaka, S.Okajo, S.Yamasaki, T.Morikawa, Persistent slip observed in TiZrNbHfTa: A body-centered high-entropy cubic alloy, Scr. Mater., 200, 113895, 2021.06. |
| 9. |
T Morikawa, R Kurosaka, M Tanaka, T Ichie and K Murakami, Observation of Inhomogeneous Deformation in a Cold-Rolled Ti-added Ultra-Low Carbon Steel using High-Precision Markers Drawn by Focused Ion Beam, Materials Science and Engineering, 2021.02. |
| 10. |
Tatsuya MORIKAWA, Shimpei YOSHIOKA, Masaki TANAKA,Yuki TOJI and Kohei HASEGAWA, Analysis of Work Hardening Behavior in Ferrite-Martensite Dual-phase Steels Using Micro-grid Method, International ISIJ, 61, 2, 616, 2021.02, To clarify the contribution of martensite increase to work-hardening during transformation-induced plasticity (TRIP), the changes in local strain distribution with tensile deformation were investigated for dual- phase steels with different volume fractions of martensite in ferrite using the precise marker method. Particular attention was paid to the changes in strain and stress bearing by martensite and ferrite with tensile deformation. The precise marker method is especially useful for local strain analysis of multiphase materials. Three types of steels with volume fractions of 25%, 50%, and 75% martensite were subjected to local strain analysis at several stages of deformation. The important results are as follows: (1) in steels with a large volume fraction of martensite, the contribution of the plastic deformation of martensite to the overall tensile strain is large from the beginning of the tensile deformation, and (2) the difference in strain bearing by martensite and ferrite increases through tensile deformation in both 25% and 50% martensitic steels. Using the constitutive equations for the stress-strain response, the strain distributions in each phase were translated into stress distributions. Then, the stress-strain response was numerically estimated by applying the general rule of mixtures using the average values of strain and stress, and compared with the experimental results. The relationship between the controlled martensitic transformation and tensile deformation behavior in TRIP steel is also discussed.. |
| 11. |
＠Yelm Okuyama, ＠Masaki Tanaka, ＠Tetsuya Ohashi and ＠Tatsuya Morikawa, Modelling and crystal plasticity analysis for the mechanical response of alloys with non-uniformly distributed secondary particles, International ISIJ, 60, 8, 754, 2020.08. |
| 12. |
Bhargavi Rani Anne, Masaki Tanaka, Tatsuya Morikawa, Temperature dependence of activation enthalpy for yielding in bimodal Ti-6Al-4V, Materials Transaction, 2019.06. |
| 13. |
Masaki Tanaka, Yukihiro Hayashi, Yelm Okuyama, Tatsuya Morikawa, Kenji Higashida, Change in Slip Mode with Temperature in Ti-0.49mass%O, Materials Transactions, 60, 1, 80-85, 2019.01. |
| 14. |
Anne Bhargavi Rani, Masaki Tanaka, Tatsuya Morikawa, Temperature Dependence of Mechanical Properties in Dual Phase Ti-6Al-4V, Proceedings of THERMEC 2018: 10TH INTERNATIONAL CONFERENCE ON PROCESSING AND MANUFACTURING OF ADVANCED MATERIALS, 941, 1479-1483, 2019.06. |
| 15. |
Yelm Okuyama, Masaki Tanaka, Tetsuya Ohashi, Tatsuya Morikawa, Temperature Dependence of the Yield Stress in alpha-Titanium Investigated with Crystal Plasticity Analysis, Proceedings of THERMEC 2018: 10TH INTERNATIONAL CONFERENCE ON PROCESSING AND MANUFACTURING OF ADVANCED MATERIALS, 941, 1474-1478, 2018.06. |
| 16. |
Kai Jianga, Hiroaki Nakano, Satoshi Oue, Tatsuya Morikawa, Zhipeng Li, Wenhuai Tian, Interrupted in situ EBSD study of texture evolution and mechanism of surface grains in electroformed Ni after annealing with an initially duplex + fiber texture during uniaxial tensile deformation, Materials Charactarization, 141, 238-247, 2018.05. |
| 17. |
Genki TSUKAMOTO, Tatsuya MORIKAWA, Kenji HIGASHIDA, Ken KIMURA, Kohsaku USHIODA, Evolution of Heterogeneous Deformation Microstructures during Cold Rolling of Poly-crystalline Ti-added Ultra Low Carbon Steel, International ISIJ, 57, 8, 1476-1483, 2017.08. |
| 18. |
Hiroshi Kaneko, Tatsuya Morikawa, Masaki Tanaka, Hirofumi Inoue, Kenji Higashida, Recrystallization Texture and Shear Band Formation in Bending, Material Transaction, 58, 2, 218-224, 2017.02. |
| 19. |
Masaaki Sugiyama, Ken Kimura, Seiki Takebayashi, Kousaku Ushioda, Tatsuya Morikawa and Kenji Higashida, 3D crystal orientation analysis of heterogeneous deformation structure in cold-rolled Ti-IF steel and its primary recrystallization behavior, Proc. of 36th Riso Int. Symp. on Materials Science, 2015.10. |
| 20. |
Hongye Gao, Ken-ichi Ikeda, Tatsuya Morikawa, Kenji Higashida, Hideharu Nakashima, Analysis of kink boundaries in deformed synchronized long-period stacking ordered magnesium alloys, Materials Letters, Vol.146 No. pp.30-33, 2015.10. |
| 21. |
Nobuyuki Ishikawa, Kyono Yasuda, Hitoshi Sueyoshi, Shigeru Endo, Hiroshi Ikeda, Tatsuya Morikawa, Kenji Higashida, Microscopic deformation and strain hardening analysis of ferrite–bainite dual-phase steels using micro-grid method, Acta Materialia, Vol.97 No. pp.257-268, 2015.08. |
| 22. |
Kyono Yasuda, Hitoshi Sueyoshi, Nobuyuki Ishikawa, Tatsuya Morikawa and Kenji Higashida, Strain Hardening and Plastic Instability of Dual-Phase Steels for Strain Based Design, Proceedings of the Twenty-fifth (2015) International Ocean and Polar Engineering Conference, 2015.08. |
| 23. |
Kyono Yasuda, Hitoshi Sueyoshi, Nobuyuki Ishikawa, Tatsuya Morikawa and Kenji Higashida, Strain Hardening and Plastic Instability of Dual-Phase Steels for Strain Based Design, Proceedings of the Twenty-fifth (2015) International Ocean and Polar Engineering Conference, 2015.08. |
| 24. |
GAO HONGYE, Ken-ichi Ikeda, Tatsuya Morikawa, Kenji Higashida, Hideharu Nakashima, Microstructures of Long-Period Stacking Ordered Phase of Mg-Zn-Y Alloy, Materials Transactions, 54, 6, 632-635, 2013.06. |
| 25. |
Kousaku Ushioda, Sae Nakanishi, Tatsuya Morikawa, Kenji Higashida, Yoshihiro Suwa, Kenichi Murakami, Evolution of Heterogeneous Deformation Structure and Recrystallization Texture of Steel, Materials Science Forum, 753, 58-65, 2013.05. |
| 26. |
Tatsuya Morikawa, Yuuki Mitani and Kenji Higashida, Inhomogeneous Deformation observed using High-Precision Markers Drawn by Electron Beam Lithography in a Magnesium Alloy with LPSO Phase, Materials Science Forum, 638-642, 1574-1578, 2010.05. |
| 27. |
Shigeo Ohtani, Tatsuya Morikawa, Kenji Higashida and Shun-ichi Hashimoto, EBSD investigation of inhomogeneous deformation in a ferrite-martensite dual phase steel, Proceedings of The 2nd International Symposium on Steel Science, 21-24, 2010.05. |
| 28. |
Electron Back Scatter Diffraction Analysis for Inhomogeneous Deformation in a Ferrite–Martensite Dual Phase Steel. |
| 29. |
Masaki TANAKA, Kenji HIGASHIDA, Tomotsugu Shimokawa and Tatsuya MORIKAWA, Brittle-ductile transition in low carbon steel deformed by the accumulative roll bonding process, Material Transactions, 50, 1, 56-63, 2009.01. |
| 30. |
Tatsuya Morikawa, Kenji Kaneko, Kenji Higashida, Daisuke Kinoshita, Masanori Takenaka and Yoshihito Kawamura, The Fine-Grained Structure in Magnesium Alloy Containing Long-Period Stacking Order Phase, Materials Transactions, Vol.49, No.6, pp.1294-1297., 2008.06. |
| 31. |
T. Morikawa, T. Kawada and K. Higashida, Localized shear deformation and fracture in a Zr-based bulk metallic glass, Mater. Sci. Forum, Vol.539-543, (2007), pp.2094-2099, 2007.12. |
| 32. |
T. Morikawa, T. Moronaga and K. Higashida, Fine-Grained Structures Associated with Deformation Twin and Its
Influence on Tensile Behaviours in a Cold-Rolled Fe-Ni Alloy, Mater. Sci. Forum, Vol.503-504, pp.895-900, 2006.09. |
| 33. |
T. Morikawa, and Y. Sunayama K. Higashida, Deformation Microstructures and Their Relation to the Texture
Development in a Cold-Rolled Austenitic Stainless Steel, Proceedings of 16th International Microscopy Congress, 2006.09. |
| 34. |
T. Morikawa, T. Moronaga and K. Higashida, The Influence of Deformation Twinning on Yield Strength in Cold-rolled
Austenitic Steels, Proceedings of Asia Steel International Conference 2006(ASIC2006), 2006.05. |
| 35. |
T. Morikawa and K. Higashida, The Role of Deformation Twinning in the Formation of a Fine-grained
Structure in Cold-rolled 310 Steels, J. Mater. Sci., 2006.01. |
| 36. |
The influence of deformation twinning on yield strengths in cold-rolled FCC ferrous alloys. |
