Kyushu University Academic Staff Educational and Research Activities Database
List of Presentations
Kudo Kentaro Last modified date:2022.06.29

Assistant Professor / Manufacturing process lectureship / Department of Mechanical Engineering / Faculty of Engineering


Presentations
1. Thomas HOEFLER、Kazunari SHINAGAWA、Kentaro KUDO, Simulating Mesoscale Microstructure Evolution During Sintering of an Injection Molded Ni-base Superalloy Using the Phase-Field Method, 粉体粉末冶金協会2022年度春季大会, 2022.05.
2. K. Shinagawa, K. Kudo,, Analysis of orientation behavior of plate-like particles in differential speed powder rolling, The 13th International Conference on the Technology of Plasticity, 2021.07.
3. K. Kudo, K. Shinagawa, Development of materials database for sintering analysis of Ni-based superalloy, NIMS WEEK 2019 Academic Symposium, 2019.10.
4. Kentaro Kudo, Kazunari Shinagawa, Hideshi Miura, The Effect of Grain Size and Pore Size on the High Cycle Fatigue Strength of Injection Molded Ti-6Al-4V Compacts, 2018 International Conference on Powder Metallurgy and Particulate Materials. POWDERMET2018, 2018.06.
5. K. KUDO, T. OSADA, K. SHINAGAWA, H. MIURA, The influence of alpha plus beta region sintering on the mechanical properties of injection molded Ti-6Al-4V compacts, JSPM International Conference on Powder and Powder Metallurgy ~60th Anniversary~ JSPMIC2017, 2017.11.
6. H. MIURA, K. KUDO, T. OSADA, K. SHINAGAWA, Y. ITOH, Development of Super High Performance Injection Molded Ti Alloy Compacts, JSPM International Conference on Powder and Powder Metallurgy ~60th Anniversary~ JSPMIC2017, 2017.11.
7. H. MIURA, K. KUDO, T. OSADA, 8. Super Excellent MIM Ti Alloys for Aerospace Application, 4th International Conference on Titanium Powder Metallurgy & Additive Manufacturing PMTi2017, 2017.09.
8. H. Miura, T. Osada, Z. Song, K. Yasui, K. Kudo, Fatigue properties of MIM super-high strengthened Fe-Ni steels with heterogeneous microstructures, 2016 International Conference on Powder Metallurgy & Particulate Materials, POWDERMET2016, 2016.07.
9. Toshiko Osada, Kentaro Kudo, Ryuichi Hashikawa, Fujio Tsumori, Hideshi Miura, Control the deformation of MIM parts by the powder size distribution, World Powder Metallurgy 2016 Congress and Exhibition, World PM 2016, 2016.01, Metal Injection Molding (MIM) process is suitable for fabricating small parts in large quantity. In this work, relatively large and complex shaped parts were prepared thorough MIM. In order to decrease the deformation of sintered parts, powders of different sizes were mixed. The effect of powder particle distribution and powder loading on the distortion of complex shaped compacts were investigated and evaluated. Smaller deformation of thelarge and complex shaped parts could be realized by using mixed powder with smallerparticle..
10. Kentaro Kudo, Hiroyoshi Ishimitsu, Jungho Choe, Toshiko Osada, Hideshi Miura, Kazunari Shinagawa, Effect of grain size on the fatigue properties of injection moulded Ti-6Al-4V compacts, World Powder Metallurgy 2016 Congress and Exhibition, World PM 2016, 2016.01, Metal injection molding (MIM) process offers net shape production and high cost efficiency in order to produce the materials with poor workability such as Ti-6Al-4V. In our previous studies, injection molded Ti-6Al-4V showed high tensile strength and elongation comparable to those of wrought materials. However, fatigue strength of injection molded Ti-6Al-4V was lower than that of wrought materials because of large grain size and retained pores. In this study, the grain size of MIM Ti-6Al-4V compacts was decreased by addition of TiB2 powder and using the fine powder. As a result, the 0.4 mass% Boron added compacts treated HIP showed the fine grain size. Therefore, 93 % of fatigue strength compared to that of wrought material was obtained. In addition, the relationship of grain size and fatigue strength showed good agreement with Hall-Petch relations..
11. R. HASHIKAWA, T. OSADA, K. KUDO, F. TSUMORI, H. MIURA, Control the Distortion of Large and Complex Shaped Parts by Metal Injection Molding Process, 3rd International Conference on Powder Metallurgy in Asia APMA2015, 2015.11.
12. T. OSADA, Y. KANDA, K. KUDO, F. TSUMORI, H. MIURA, High Temperature Mechanical Properties of TiAl Alloy Parts Fabricated By Metal Injection Molding, 3rd International Conference on Powder Metallurgy in Asia APMA2015, 2015.11.
13. J. CHOE, T. OSADA, K. KUDO, F. TSUMORI, H. MIURA, Effect of Minor Boron Addition on the Fatigue Strength and High Temperature Properties of Injection Molded Ti-6Al-4V Compacts, 3rd International Conference on Powder Metallurgy in Asia APMA2015, 2015.11.
14. K. TOKUMARU, F. TSUMORI, K. KUDO, T. OSADA, H. MIURA, Development of Corrugated Ceramic Sheet for SOFC Electrolyte by Micro Imprint Process, 3rd International Conference on Powder Metallurgy in Asia APMA2015, 2015.11.
15. S. HUNT, F. TSUMORI, K. KUDO, T. OSADA, H. MIURA, Wavy Micro Channels in Micropatterned Ceramic Sheet Formed by Combined Process of Laser Beam Machining and Imprinting, 3rd International Conference on Powder Metallurgy in Asia APMA2015, 2015.11.
16. Choe Jungho, Toshiko Osada, Kentaro Kudo, Fujio Tsumori, Hideshi Miura, Improvement of fatigue strength for titanium alloy compacts by MIM, 2015 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2015, 2015, Ti-6Al-4V alloy is paid the attention from the automotive and aerospace industries because of its outstanding specific strength and corrosion resistance. On the other hand, Ti-6Al-4V alloy has normally poor workability. Therefore, Metal Injection Molding (MIM) process is hoped to be one of the technique to reduce the manufacturing cost. Recently many researches for Ti-6Al-4V compacts by MIM process were reported, however, there are a few reports about fatigue fracture properties. According to our previous study, they presented a problem of low fatigue strength compared to wrought material. In this study, to improve the fatigue strength of Ti-6Al-4V compacts by MIM process, a little amount of boron was added by using TiB2 powder. Boron showed the effect of refining the grain size of lamellar structure of Ti-6Al-4V compacts, which lead to increase the fatigue strength..
17. Terukazu Tokuoka, Yoshitomo Nakahara, Kentaro Kudo, Takao Nishioka, Hideshi Miura, Effect of microstructure on the rolling contact fatigue strength of 4600 steel P/M compacts, World Powder Metallurgy Congress and Exhibition, World PM 2010, 2010.01, Generally, the mechanical properties of conventional P/M materials are inferior to those of wrought materials. Therefore, the improvement of mechanical properties for P/M materials is needed for heavy-duty applications such as automotive transmission gears. Heat-treated 4600 steel MIM compacts with heterogeneous microstructure, which are made possible using mixed elemental powders, showed excellent tensile and bending fatigue strength in our previous studies. This study was performed to clarify the relationship between rolling contact fatigue behavior and the microstructure in 4600 steel P/M compacts using prealloyed and mixed elemental powders. The heterogeneous microstructure using mixed elemental powders showed slightly superior properties compared with the homogeneous microstructure using prealloyed powder. Those compacts were also densified by rolling. Contrary to the prediction, the rolling contact fatigue strength of the rolled sample was on the same level as the non-rolled sample..