2022年度

　　■LPSO/MFS2022 : The 5th International Symposium on Long-Period Stacking/Order Structure and Mille-feuille Structure 　　　2022. Dec. 11-14　　　＜Japan, Tokyo＞
　　　　◯H.Ohkoshi(ポスター), Y.Todaka, N.Adachi, I.Fukuoka, M.Kouno, N.Kaneda, H.Somekawa, D.Ando, M.Yuasa
　　　　　　”Work-hardening Behavior of Mg-Y-Zn Alloy with Long-periodic Stacking Ordered Phase in High-pressure Torsion Process”

　　■IMRC2022 : International Materials Research Congress　　　2022 Aug. 14-19　　　＜ONLINE(Mexico, Cancun)＞
　　　　◯Y.Todaka(口頭), N.Adachi, Y.Shiihara, Y.Umeno, Y.Hino, Y.Oba, M.Mitsuhara, M.Nishida
　　　　　　”Effect of Lattice Defects and Texture on Tribological Behavior under Oil Lubrication in Pure FE Produced by High-Pressure Torsion Straining and Annealing”
　　　　◯J.L.A.P.Ruiz(口頭), S.Ishizuka, Y.Todaka, Y.Yamada, A.R.Serrato, J.M.H.Ramirez
　　　　　　”Semi-Empirical Determination of Thermoelectric Properites of CaMgSi Synthesized by Mechanical Milling and Spark Plasma Sintering”
　　　　◯M.F.Esparza(口頭), A.S.Rodriguez, J.G.C.Moreno, J.M.H.Ramirez, Y.Todaka, J.M.Cabrera
　　　　　　”Microstructures and Microhardness of Mg-Ni-Nb2O5 Powder Mixtures Consolidated Through Severe Plastic Deformation Using High Pressure Torsion”
　　　　◯M.O.Garcia(ポスター), K.Suarez, Y.Todaka, F.C.Gandarilla, A.T.Ochoa, J.M.H.Ramirez, J.G.C.Moreno
　　　　　　”Mg-Ni-Nb2O5 Alloy Processed by High-Pressure Torsion for Applications in Hydrogen Storage”

　　■ICAS2022 : The 7th International Conference on Advanced Steels　　　2022 May. 29 - Jun.1　　　＜Japan, Tsukuba＞
　　　　◯Y.Todaka(口頭), N.Adachi, H.Miura, M.Kobayashi, C.Watanabe, Y.Aoyagi
　　　　　　”Hydrogen Embrittlement Behavior of Nanostructured SUS316LN Austenitic Stainless Steel Produced by Heavy Cold-rolling and High-pressure Torsion Straining”

　　■ICAS2022 : The 7th International Conference on Advanced Steels Online Poster presentation　　　2021. Apr. 15-29　　　＜ONLINE＞
　　　　◯R.Hamana(ポスター), N.Adachi, Y.Todaka, T.Ohmura
　　　　　　”Mechanical behavior of Si-alloyed interstitial free steels investigated by pop-in analysis during nanoindentation”

2021年度

　　■The 15th Joint MMM-INTERMAG Conference (2022 Joint)　　　2022 Jan. 10-14　　　＜U.S.A, New Orleans＞
　　　　◯M.Bersweiler(口頭), E.P.Sinaga, I.Peral, N.Adachi, P.Bender, N.Steinke, E.Gilbert, Y.Todaka,, Y.Oba, A.Michels
　　　　　　”Revealing defect-induced spin disorder in nanocrystalline”

　　■ISATE 2021 : 14th International Symposium on Advances in Technology Education　　　2021. Aug. 17-20　　　＜Finland, Turku ONLINE＞
　　　　◯F.J.Mweta, Y.Todaka(口頭), N.Adachi
　　　　　　”Mechanical Property Changes of Austenitic Stainless Steels by Severe Plastic Deformation and Subsequent Aging”

　　■The 12th International Conference on Magnesium Alloys and their Applications (Mg 2021)　　　2021. Jun. 15-18　　　＜Virtual Event＞
　　　　◯N.Adachi(口頭), Y.Todaka, I.Fukuoka, H.Somekawa, D.Ando, M.Yuasa
　　　　　　”Effect of Deformation Path on Work-hardening Behavior in Long-period Stacking Ordered Phase of Mg-Zn-Y Alloys”

　　■International Conference on Processing & Manufactoring of advanced Materials(THERMEC'2021)　　　2021. Jun. 1-5　　　＜Virtual Conference＞
　　　　◯N.Adachi(口頭), Y.Todaka
　　　　　　”Impact of mechanical rejuvenation on plastic deformation of bulk metallic glass investigated from mechanical response perspective.”
　　　　◯I.Fukuoka(ポスター), N.Adachi, Y.Todaka, H.Somekawa, D.Ando, M.Yuasa
　　　　　　”Work hardening behavior of Mg-based LPSO alloys by high-pressure torsion process”

2020年度

　　■The 19th International Conference on Textures of Materials (ICOTOM 19)　　　2021. Mar. 1-4　　　＜Virtual Conference, Japan＞
　　　　◯Y.Todaka(口頭), N.Adachi, Y.Shiihara, Y.Umeno, M.Hino, Y.Oba, M.Mitsuhara
　　　　　　”Effect of Texture on Tribological Behavior under Oil Lubrication in Pure Fe Produced by High-Pressure Torsion Straining and Annealing ”

　　■ICMSE 2021 : International Conference on Materials Science and Engineering　　　2021. Feb. 25-26　　　＜Japan, Tokyo＞※Online
　　　　◯F.Jaksoni Mweta(口頭), N.Adachi, Y. Todaka, H.Sato, Y.Sato, H.Miura, M.Kobayashi, C.Watanabe, Y.Aoyagi
　　　　　　”Effect of Nanostructure on Hydrogen Embrittlement Resistance of the Severely Deformed 316LN Austenitic Steel”

2019年度

　　■International Tribology Conference Sendai 2019　　　2019.Sep. 17-21　　　＜Japan, Sendai＞
　　　　◯Y.Todaka(口頭), N.Adachi, Y.Shiihara, Y.Umeno, M.Hino, Y.Oba, M.Mitsuhara, M.Nishida
　　　　　　”Effect of lattice defects on tribological behavior under lubricants in nanostructured steels produced by heavy plastic deformation processes ”

　　■The 10th Pacific Rim International Conference on Advanced Materials and Processing (PRICM10)　　　2019.Aug. 18-22　　　＜China, Xi’an＞
　　　　◯Y.Todaka(口頭), A.Tejeda-Ochoa, N.Kametani, N.Adachi, M.Mitsuhara, W.Li, J.M.Herrera-Ramirez　　　Invited
　　　　　　”Phase transformation of Ti-Mg alloys by heavy plastic deformation”

2018年度

　　■TMS2019 ANNUAL MEETING & EXHIBITION　　　2019.Mar.10-14　　　＜U.S.A, San Antonio, Texas＞
　　　　◯H.Sato(口頭), Y.Todaka, K.Sato, N.Adachi
　　　　　　”Effect of hydrogen on grain refinement behavior of pure Fe by high-pressure torsion-straining”

　　■17th International Conference on Metal Forming, Metal Forming 2018　　　2018.Sep.16-19　　　＜Japan, Toyohashi＞
　　　　◯N.Adachi(ポスター), H.Sato, Y.Todaka, T.Suzuki
　　　　　　”Mechanical properties and plastic deformation behavior of severely deformed pure Fe”
　　　　◯N.Hyodo(ポスター), N.Adachi, M.Hino, Y.Todaka, Y.Oba
　　　　　　”Effect of grain size on friction coefficient under oil lubrication in nanostructured Fe fabricated by PVD and SPD methods”

　　■6th International Indentation Workshop (IIW6)　　　2018. July 1-6　　　＜Japan, Sapporo＞
　　　　◯S.Kobayashi(ポスター), C.Watanabe, Y.Aoyagi, Y.Todaka, M.Kobayashi, H.Miura, T.Omura
　　　　　　”Hardness distribution of heterogeneous-nano structured stainless steels fabricated by heavily cold-rolling”
　　　　◯T.Suzuki(ポスター), N.Adachi, Y.Todaka, S.II, T.Ohmura
　　　　　　”Influence of Si Content on Nanoindentation Behavior of Si Added IF Steel”

2017年度

　　■The 5th International Symposium on Steel Science (ISSS 2017)　　　2017.Nov.11-16　　　＜Japan, Kyoto＞
　　　　◯N.Adachi(口頭), H.Sato, Y.Todaka
　　　　　　”Mechanical behavior of ultrafine grained pure Fe fabricated by high-pressure torsion prcess”

　　■JSPM International Conference on Powder and Powder Metallurgy　　　2017.Nov.6-9　　　＜Japan, Kyoto＞
　　　　◯N.Adachi(口頭), Y.Todaka
　　　　　　”Relation between tensile plastic elongation and beta relaxation in severely deformed bulk metallic glass”
　　　　◯H.Sato(口頭), N.Adachi, Y.Todaka
　　　　　　”Deformation behavior in ultrafine-grained pure Fe with a large uniform elongation”

　　■NIMS WEEK 2017　　　2017.Oct.4-6　　　＜Japan, Tsukuba＞
　　　　◯H.Sato(ポスター), N.Adachi, Y.Todaka
　　　　　　”Effect of hydrogen on the mechanical properties of pure Fe with ultrafine-grain”
　　　　◯K.Tonotsuka(ポスター), Y.Todaka, N.Adachi, M.Izaki, M.Mitsuhara, M.Nishida, S.Watase, M.Nakamura　　　Poster Award　受賞
　　　　　　”Influence of high-density lattice defects on physisorbed film formation”
　　　　◯N.Hyodo(ポスター), Y.Todaka, N.Adachi, Y.Hino, Y.Oba, M. Mitsuhara, M.Nishida
　　　　　　”Tribological property of ion beam sputtered coatings with different coating thickness”

　　■The 15th International Conference on Advanced Materials(IUMRS-ICAM 2017)　　　2017.Aug.27-Sep.1　　　＜Japan, Kyoto＞
　　　　◯Y.Todaka(口頭), N.Adachi, Y.Shiihara, Y.Umeno, M.Hino, Y.Oba, M.Mitsuhara, M.Nishida　　　Invited
　　　　　　”Effect of Lattice Defects on Tribological Behavior under Lubricants in Nanostructured Steels Produced by Heavy Plastic Deformation Processes”

　　■EMN 3CG & Metallic Glasses Meeting 2017　　　2017.Aug.7-11　　　＜Germany, Berlin＞
　　　　◯Y.Todaka(口頭), N.Adachi, H.Satou, S.Morooka, S.Harjo　　　Invited
　　　　　　”Origin of Uniform Tensile Elongation in Nanostructured Pure Fe Produced by Severe Plastic Deformation”
　　　　◯N.Adachi(口頭), Y.Todaka
　　　　　　”Impact of beta-relaxation on tensile elongation in severely deformed bulk metallic glasses”

　　■Frontiers in Materials Processing Applications, Research and Technology(FiMPART'2017)　　　2017.Jul.9-12　　　＜France, Bordeaux＞
　　　　◯Y.Todaka(口頭),　M.Horii, S.Tachibana, N.Adachi, M.Mitsuhara, M.Nishida
　　　　　　”Tribological behavior under lubricant in heavy plastic deformed steels with high-density of lattice defects”
　　　　◯Y.Oba(口頭), N.Adachi, Y.Todaka, K.Yamamoto, M.Sugiyama
　　　　　　”Small-angle neutron scattering of anomalous magnetic microstructure in pure Fe induced by high-pressure torsion straining”
　　　　◯Y.Shiihara(口頭), Y.Umeno, M.Mitsuhara, M.Nishida, Y.Todaka
　　　　　　”Atomistic-level interaction between lubricant and SPD-processed metallic surface: first principles, molecular dynamics, and coarse-grained molecular dynamics approaches”

2016年度

　　■International Hydrogen Conference 2016　　　2016,Sep.11-14　　　＜U.S.A, Wyoming＞
　　　　◯K.Tomatsu(口頭), T.Omura, Y.Todaka
　　　　　　”Influence of Hydrogen on Nanohardness of Pure Iron with Different Dislocation Densities Investigated by Electrochemical Nanoindentation”

　　■The 9th Pacific Rim International Conference on Advanced Materials and Processing (PRICM9)　　　2016,Aug.1-5　　　＜Japan, Kyoto＞
　　　　◯Y.Aoyagi(口頭), T.Uoji, C.Watanabe, M.Kobayashi, Y.Todaka, H.Miura
　　　　　　”Multiscale Simulation on Effect of Hetero-nanostructures on Mechanical Properties of Severe Rolled Stainless Steel”

　　■The 9th International Conference on Processing & Manufacturing of Advanced Materials(Thermec 2016)　　　2016,May.29-Jun.3　　　＜Austria, Graz＞
　　　　◯Y.Todaka(口頭),　N.Adachi, Y.Yokoyama, M.Umemoto　　　Invited
　　　　　　”Mechanical property evolution of Zr-based bulk metallic glasses induced by high-pressure torsion straining”
　　　　◯C.Watanabe(口頭), Y.Aoyagi, Y.Todaka, M.Kobayashi, H.Miura
　　　　　　”Development of hetero-nano structure in a 316LN austenitic stainless steel during cold-rolling”
　　　　◯H.Yilmazer(口頭), B.Dikici, M.Niinomi, M.Nakai, H.Lui, Y.Todaka, A.Nuri Ozcivan
　　　　　　”Electrochemical behaviors of biomedical nano-grained β-type titanium alloys”

2015年度

　　■Australia-Japan Workshop on Neutron Science　　　2016,Mar.4　　　＜Japan, Ibaraki＞
　　　　◯Y.Oba(口頭), N.Adachi, Y.Todaka, K.Yamamoto, M.Sugiyama
　　　　　　”Anomalous magnetic small-angle neutron scattering in severely deformed pure Fe”

　　■TMS2016 145th ANNUAL MEETING & EXHIBITION　　　2016,Feb.14-18　　　＜U.S.A, Nashville＞
　　　　◯N.Adachi(口頭), Y.Todaka, M.Umemoto
　　　　　　”Thermal Stability of ω-phase in Pure Ti Formed By High-pressure Torsion”

　　■The 3rd　International Conference of Global Network for Innovative Technology (IGNITE2016)　　　2016,Jan.27-29　　　＜Malaysia, Penang＞
　　　　◯Y.Todaka(口頭), M.Horii, S.Tachibana, N.Adachi, R.Kokawa, S.Moriguchi, M.Umemoto　　　Keynote
　　　　　　”Tribological Behavior under Lubricants in Nanostructured Steels Produced by Heavy Plastic Deformation Processes”
　　　　◯N.Adachi(口頭), Y.Todaka, M.Umemoto
　　　　　　”Mechanical Property and Transformation Behavior of Bulk Nano Crystalline ω-phase Formed by High-pressure Torsion process”
　　　　◯N.Miyazaki(ポスター), Y.Todaka,　R.Fujimoto, K.Shimizu, N.Adachi, M.Umemoto, H.Miyazaki, Y.Nishino
　　　　　　”Structure and Thermoelectric Property of Bulk CaMgSi Intermetallic Compound”

　　■the Twenty-Fourth International Symposium on Processing and Fabrication of Advanced Materials (PFAM XXIV)　　　2015,Dec.18-20　　　＜Japan, Osaka＞
　　　　◯Y.Todaka(口頭), M.Horii, S.Tachibana, N.Adachi, M.Umemoto　　　Invited
　　　　　　”Effect of Lattice Defects on Tribological Behavior under Lubricants in Nanostructured Steels”

　　■The 13th World Conference on Titanium (Ti-2015)　　　2015,Aug.16-20　　　＜U.S.A, San Diego＞
　　　　◯Y.Todaka(口頭), N.Adachi, H.Suzuki, M.Umemoto
　　　　　　”Tensile Property of Bulk Nanostructured ω-Ti Produced by High-pressure Torsion Straining”
　　　　◯H.Yilmazer(口頭), M.Niinomi, K.Cho, M.Nakai, Y.Todaka, B.Dikici, M.Sen, H.Shiku, T.Matsue
　　　　　　”Mechanical and Surface Functionalities of Nanostructured β-type Titanium Alloys through Severe Plastic Deformation”

　　■the 17th International Conference on Environmental Degradation of Materials in Nuclear Power Systems　　　2015,Aug.9-13　　　＜Canada, Ottawa＞
　　　　◯R.Ishibashi(口頭), Y.Todaka
　　　　　　”Effect of severe-cold-working on microstructure of Zircaloy 2”

　　■5th International Conference on Recent Advances in Materials, Minerals & Environment (RAMM)　　　2015,Aug.4-6　　　＜Malaysia, Penang＞
　　　　◯Y.Todaka(口頭),　N.Adachi, T.Idobata, T.Nakakita, M.Umemoto　　　Invited
　　　　　　”Pressure-Induced Phase Transformation Behavior in Pure Ti, Pure Zr, and Fe-Mn alloys by High-Pressure Torsion Straining”

2014年度

　　■The 13th International Symposium on Physics of Materials (ISPMA 13)　　　2014,Aug.31-Sep.4　　　＜Czech Republic, Prague＞
　　　　◯Y.Todaka(口頭),　N.Adachi, T.Idobata, T.Nakakita, M.Umemoto
　　　　　　”Pressure-Induced Phase Transformation Behavior in Pure Ti, Zr, and Hf by High-Pressure Torsion Straining”
　　　　◯N.Adachi(口頭), Y.Todaka, K.Shintani, Y.Yokoyama, M.Umemoto
　　　　　　”Pronounced β-relaxation in severely deformed bulk metallic glass by high-pressure torsion straining”

　　■The 17th International Conference on Textures of Materials (ICOTOM-17)　　　2014,Aug.24-29　　　＜Germany, Dresden＞
　　　　◯N.Adachi(口頭), Y.Todaka, 　T.Idobata, H.Suzuki, M.Umemoto
　　　　　　”Texture evolution of high-pressure ω phase in pure Ti and Zr by high-pressure torsion - straining”

　　■The 6th International Conference on Nanomaterials by Severe Plastic Deformation (NANOSPD6)　　　2014,Jun.30-Jul.4　　　＜France, Metz＞
　　　　◯Y.Todaka(口頭), T.Otsuki, S.Morooka, S.Harjo, M.Umemoto
　　　　　　”Texture evolution of high-pressure ω phase in pure Ti and Zr by high-pressure torsion - straining”

2013年度

　　■TMS2014 143rd Annual Meeting & Exhibition　　　2014,Feb.16-20　　　＜U.S.A, San Diego＞
　　　　◯N.Adachi(口頭), Y.Todaka, K.Shintani, Y.Yokoyama, M.Umemoto
　　　　　　”Effect of severe plastic deformation on mechanical property and relaxation behavior of Zr-based metallic glass”

　　■The Fifth World Tribology Congress(WTC2013)　　　2013,Sep.8-12　　　＜Italy, Torino＞
　　　　◯H.Kato(口頭), Y.Todaka
　　　　　　”Wear Properties of Sub-microcrystalline Pure Iron Produced by Severe Plastic”

2012年度

　　■The 5th International Symposium on Designing, Processing and Properties of Advanced Engineering Materials (ISAEM-2012)　　　2012,Nov.5-8　　　＜Japan, Toyohashi＞
　　　　◯R.Ueji(ポスター), Y.Nagaki, A.Otsuka, Y.Todaka
　　　　　　”Strain Rate Dependence of Hydrogen Embrittlement of Low Carbon Steel Martensite”
　　　　◯R.Fujimoto(ポスター), Y.Todaka, Y.Adachi, K.Shimizu, M.Umemoto　　　Best Poster Award 受賞　(共著者も受賞)
　　　　　　”Synthesis and Thermoelectric Characterization of Ca-Mg-Si Alloys”
　　　　◯N.Adachi(ポスター), Y.Todaka, K.Shintani, Y.Yokoyama, M.Umemoto　　　Best Poster Award 受賞　(共著者も受賞)
　　　　　　”Effect of Residual Stress on Hardness in Deformed Zr50Cu40Al10 Bulk Glassy Alloy by High-Pressure Torsion -Straining”
　　　　◯N.Adachi(ポスター), Y.Todaka, K.Shintani, Y.Yokoyama, M.Umemoto
　　　　　　”Fabrication of Zr-based Binary Bulk Glassy Alloys by High-Pressure Torsion -Straining”
　　　　◯K.Shintani(ポスター), Y.Todaka, N.Adachi, Y.Yokoyama, M.Umemoto
　　　　　　”Improvement of Plastic Elongation in Zr50Cu40Al10 Bulk Glassy Alloy Depending on Excess Free Volume Introduced by Severe Plastic Deformation”
　　　　◯T.Idobata(ポスター), Y.Todaka, N.Adachi, M.Iketani, M.Umemoto
　　　　　　”Stabilization and Deformation Behavior of ω-Phase in Pure Zr by High-Pressure Torsion -Straining”
　　　　◯Y.Adachi(ポスター), Y.Todaka, R.Fujimoto, M.Umemoto
　　　　　　”Thermoelectric Property of Ga Doped Mg2Si Synthesized by Mechanical Ball-Milling and Spark Plasma”
　　　　◯Y.Todaka(ポスター), K.Morisako, A.Otsuka, R.Ueji, T.Omura, K.Kobayashi, M.Umemoto
　　　　　　”Tensile Property of Hydrogen-Charged Submicrocrystalline Ultra-Low Carbon Steel Produced by High-Pressure Torsion - Straining”

　　■The 2012 International Hydrogen Conference　　　2012,Sep.9-12　　　＜U.S.A., Moran, Wyoming＞
　　　　◯Y.Todaka(ポスター), K.Morisako, R.Ueji, A.Otsuka, M.Umemoto
　　　　　　”Influence of strain rate on hydrogen embrittlement in submicrocrystalline Ultra-Low carbon steel produced by high-pressure torsion straining”

　　■International Workshop on Bulk Nanostructured Metals 　　　2012,June.26-29　　　＜Japan, Kyoto＞
　　　　◯H.Kato(ポスター), Y.Todaka
　　　　　　”Tribological Properties of Sub-microcrystalline Ultra-Low Carbon Steel Produced by High-Pressure Torsion Straining”
　　　　◯R.Ueji(ポスター), T.Yoshisako, Y.Todaka
　　　　　　”Effect of grain size and grain boundary precipitates on ductility of Hadfield steel at high speed deformation”
　　　　◯N.Adachi(ポスター), Y.Todaka, M.Umemoto, H.Suzuki
　　　　　　”Crystalline orientation relations of α-to ω-phase in pressure-induced transformation of Zr by high-pressure torsion straining”
　　　　◯Y.Todaka(口頭), N.Adachi, H.Sato, M.Iketani, N.Tochigi, R.Ueji, M.Umemoto　　　Invited
　　　　　　”Pressure-Induced Phase Transformation Behavior in Pure Ti, Pure Zr, and Fe-Mn alloys by High-Pressure Torsion Straining”

　　■NIMS conference 2012 　　　2012,June.4-6　　　＜Japan, Ibaraki＞
　　　　◯N.Adach(ポスター)i, Y.Todaka, K.Shintani, Y.Yokoyama, M.Umemoto
　　　　　　”Mechanical Property Evolution of Zr50Cu40Al10 Bulk GlassyAlloy Deformed by High-pressure Torsion Straining”
　　　　◯Y.Todaka(ポスター), H.Sato, N.Tochigi, R.Ueji, M.Umemoto
　　　　　　”Pressure-Induced phase transformation behavior in α-MnSteels by high-pressure torsion straining”

　　■The 3rd International Symposium on Steel Science (ISSS 2012) 　　　2012,May.27-30　　　＜Japan, Kyoto＞
　　　　◯I.Shuro(ポスター), H.H.Kuo, Y.Todaka, M.Umemoto
　　　　　　”Phase transformations in SUS304 deformed by HPT”
　　　　◯R.Ueji(ポスター), T.Yoshisako, Y.Todaka, T.Mizuguchi, Y.Tanaka, K.Shinagawa
　　　　　　”Effect of solute carbon on high speed deformation of Hadfield steel”
　　　　◯Y.Todaka(ポスター), K.Morisako, Y.Matsumoto, R.Ueji, A.Otsuka, M.Umemoto
　　　　　　”Influence of punching velocity in small punch test on hydrogen embrittlement in ultra-low carbon steel with ultrahigh density lattice defects”

2011年度

　　■1st Japan-Thailand Friendship International Workshop on Science Technology & Technical Education, Hand-making Education, Engineering Education,
　　　　 Environmental Education 2012( Proceedings of JTHES'12) 　　　　　　　　　　　　　　　　　　　　2012,Maｒ.28-29　　　＜Japan, Miyazaki＞
　　　　◯A.Takahashi, N.Yamamoto, T.Higashi, T.Toyohiro, Y.Todaka
　　　　　　”Ductile to Brittle Transition Temperature Behavior of Pure Fe Produced by HPT Method”

　　■Symposium on Materials Processing and Interfaces from 141st TMS Annual Meeting and Exhibition 　　　2012,Mar..11-15　　　＜U.S.A., Orlando＞
　　　　◯M.Ueda, H.Matsuhira, Y.Takasaki, M.Ikeda, Y.Todaka
　　　　　　”Recrystallization behavior in Ti-13Cr-1Fe-3Al alloy after severe plastic deformation”

　　■The 6th International Symposium on Advanced Science and Technology in Experimental Mechanics (6th ISEM'11-Sendai/Kansai) 　　　2011,Nov.3-5　　　＜Japan, Osaka＞
　　　　◯R.Arishima(ポスター), T.Uchimura, T.Higashi, A.Takahashi, N.Yamamoto, T.Toyohiro, Y.Todaka
　　　　　　”Mechanical Properties on Pure Fe Fabricated by Severe Plastic Deformation”

　　■International Conference on Processing & Manufacturing of Advanced Materials (THERMEC'2011) 　　　2011,Aug.1-5　　　＜Canada, Quebec＞
　　　　◯Y.Todaka(口頭), K.Koujina, T.Yakushiji, H.Nagai, Y.Iguchi, M.Umemoto　　　Invited
　　　　　　”Mechanical Properties of Surface-Nanocrystallized Carbon-Steels Produced by SPD.”

2010年度

　　■International Symposium on Giant Straining Process for Advanced Materials (GSAM-2010) 　　　2010,Nov.19-22　　　＜Japan, Fukuoka＞
　　　　◯I.Shuro(ポスター), H.C.Wang, M.Umemoto, H.H.Kuo, Y.Todaka　　　Excellent Poster Award 受賞
　　　　　　”A comparative study of the annealing behavior of HPTed austenitic stainless steels”
　　　　◯Y.Todaka(口頭), K.Morisako, Y.Matsumoto, R.Ueji, Y.Nagaki, M.Umemoto
　　　　　　”Hydrogen embrittlement behavior of bulk nanostructured pure Fe produced by high-pressure torsion straining”
　　　　◯M.Umemoto(口頭), I.Shuo, H.C.Wang, Y.Todaka, H.H.Kuo
　　　　　　”Strain induced transformation and annealing behavior of SUS304 stainless steel processed by HPT”

2009年度

　　■TMS(Materials Science & Technology) 2010 Annual Meeting & Exhibition 　　　2010,Feb.14-18　　　＜U.S.A., Seattle WA＞
　　　　◯Y.Todaka(口頭), H.Azuma, K.Irie, N.Adachi, Y.Ohnishi, M.Umemoto　　　Invited
　　　　　　”Microstructure Evolutions in Ti and Zr by Pressure-Induced Phase Transformation under HPT-Straining”

　　■Eighteenth International Conference on Processing and Fabrication of Advanced Materials (PFAM XVIII) 　　　2009,Dec.12-14　　　＜Japan, Sendai＞
　　　　◯K.Koujina(ポスター), Y.Todaka, T.Yakushiji, H.Nagai, Y.Iguchi, M.Umemoto　　　Best Poster Award　受賞
　　　　　　”Formation of nanocrystalline structure at worn surface in carbon steel by wearing process”
　　　　◯S.Farjami(口頭), K.Tsuchiya, Y.Todaka, M.Umemoto
　　　　　　”Nanocrystallization of β-titanium alloys by high-pressure torsion”
　　　　◯O.Ciuca(口頭), K.Tsuchiya, Y.Yokoyama, Y.Todaka, M.Umemoto
　　　　　　”Structural refinement of Ni3Al intermetallic compound by high-pressure torsion”
　　　　◯Y.Todaka(口頭), H.Azuma, Y.Ohnishi, M.Umemoto　　　Invited
　　　　　　”High-functionalization of Mechanical property in Ti and Zr by pressure-induced phase transformation under high-pressure torsion straining”
　　　　◯K.Morisako(口頭), Y.Todaka, M.Kumagai, Y.Matsumoto, M.Umemoto
　　　　　　”Influence of hydrogen on mechanical properties of submicrocrystalline ultra-low carbon steel produced by high-pressure torsion straining”
　　　　◯K.Tsuchiya(口頭), S.Yamamoto, Y.Yokoyama, H.Kato, Y.Todaka, M.Umemoto
　　　　　　”Severe plastic deformation of Zr-Cu-Al metallic glass in as-cast and crystallized conditions”
　　　　◯M.Umemoto(口頭), Y.Todaka, N.Wu, Y.Ohnishi, H.Azuma, K.Tsuchiya
　　　　　　”Effect of strain gradient and pressure in HPT on the hardening and grain refinement of metals”

　　■The 5th International Conference on Mechanical Stress Evaluation by Neutrons and Synchrotron Radiation (MECA SENS-V) 　　　2009,Nov.10-12　　　＜Japan, Mito＞
　　　　◯H.Azuma(ポスター), Y.Todaka
　　　　　　”Influence of pressure and shear deformation on stabilization of ω -Zr produced by high-pressure torsion straining”

　　■The 2nd International Symposium on Steel Science (IS3-2009) 　　　2009,Oct.21-24　　　＜Japan, Kyoto＞
　　　　◯Y.Todaka(ポスター), K.Morisako, M.Kumagai, Y.Matsumoto, M.Umemoto
　　　　　　”Hydrogen Embrittlement of Submicrocrystalline Ultra-Low Carbon Steel Produced by High-Pressure Torsion Straining”

　　■International Conference on Processing & Manufacturing ｏｆ Advanced Materials (THERMEC'2009) 　　　2009,Aug.25-29　　　＜Germany, Berlin＞
　　　　◯Y.Todaka(口頭), H.Nagai, Y.Takubo, M.Yoshii, M.Kumagai, M.Umemoto
　　　　　　”Mechanical Properties Of Submicrocrystalline If Steel Produced By HPT-Straining”

　　■15th International Conference on the Strength of Materials (ICSMA15) 　　　2009,Aug.16-21　　　＜Germany, Dresden＞
　　　　◯Y.Todaka(口頭), H.Azuma, Y.Ohnishi, Umemoto
　　　　　　”High-functionalization of mechanical properties in Ti and Zr by SPD under high-pressure.”

　　■Asia Steel International Conference 2009 　　　2009,May.24-27　　　＜Korea, Busan＞
　　　　◯K.Sugita(口頭), T.Maruyama, S.Yokoyama, Y.Todaka, M.Umemoto
　　　　　　”Transformation behavior and hardness of vanadium-microalloyed medium carbon steel after isothermal transformation”