YUASA MOTOHIRO
Faculty of Science and Engineering Department of Energy and Mechanical Engineering
Associate Professor
Last Updated :2019/09/19

Researcher Profile and Settings

Research Areas

  • Material engineering/Structural/Functional materials

Academic & Professional Experience

  • Visiting scholar, Department of Materials Science and Engineering, Northwestern University, 2014/05 - 2014/09

Education

  • Kyoto University, Graduate School of Energy Science, Department of Energy Science and Technology, 2012
  • Kyoto University, Graduate School of Energy Science, Department of Energy Science and Technology, 2009
  • Kyoto University, Faculty of Engineering, 2007

Academic Degrees

  • Ph. D, Kyoto University

Association Memberships

  • The Japan Institiute of metals
  • The Japan Institiute of Light Metals
  • The Japan Society for Technology of Plasticity
  • The Society of Materials Science, Japan
  • The Japan Magnesium Association

Published Papers

  • Electrodeposition of nanocrystalline nickel embedded with inert nanoparticles formed via inverse hydrolysis
    Febe Merita, Daisuke Umemoto, Motohiro Yuasa, Hiroyuki Miyamoto, Takuya Goto
    Applied Surface Science, Elsevier {BV}, 458612 , Nov. 2018
  • Enhanced corrosion resistance of ultrafine-grained fe-cr alloys with subcritical cr contents for passivity
    Muhammad Rifai, Motohiro Yuasa, Hiroyuki Miyamoto
    © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This work presents an experimental validation that an ultrafine grained (UFG) structure of binary Fe-Cr alloys fabricated by severe plastic deformation (SPD) can bring about dramatic improvements in the corrosion resistance. More specifically, UFG Fe-Cr alloys with subcritical chromium content for passivation (8% and 10% Cr) was found to exhibit passivity, and was resistant to corrosion in an aqueous 0.6 mol/L NaCl solution whereas coarse-grained Fe-12% Cr, which are known as a stainless steel and passive in most dilute aerated solution, was degraded by corrosion. The findings indicated that the critical threshold of Cr content required for establishing a protective layer by self-passivation in binary Fe-Cr alloy is microstructure dependent, and can be reduced by grain size reduction to a sub-micron scale by SPD., Metals, 8, 01 Mar. 2018
  • Effect of Deformation Structure and Annealing Temperature on Corrosion of Ultrafine-Grain Fe-Cr Alloy Prepared by Equal Channel Angular Pressing
    Muhammad Rifai, Motohiro Yuasa, Hiroyuki Miyamoto
    © 2018 Muhammad Rifai et al. The effect of the deformation structure and annealing temperature on the corrosion of ultrafine-grain (UFG) Fe-Cr alloys with 8 to 12% Cr prepared by equal channel angular pressing (ECAP) was investigated with particular emphasis on the stability of the passivation layer. Fe-Cr alloys were processed by ECAP using up to eight passes at 423 K by the Bc route, followed by annealing at temperatures of 473 to 1173 K for 1 h. Passivity appeared in all alloys as a result of ECAP, and the stability of the passivation layer was evaluated by anodic polarization measurements in a 1000 mol·m-3NaCl solution. The stability of the passivation layer increased as the degree of deformation became more extensive with successive ECAP passes, and distinct escalation occurred with the formation of a UFG microstructure. In the early stages of annealing at moderate temperatures, the stability of the passivation layer deteriorated, although no visible grain growth occurred, and this effect increased monotonically with increasing annealing temperature. The high degree of stability of the passivation layer on UFG alloys following ECAP can be attributed to the large number of high-angle nonequilibrium grain boundaries, which may lead to Cr enrichment of the surface region. The deterioration of the passivation layer in the early stages of annealing may be attributed to a change in the grain boundaries to an equilibrium state. The present results show that the superiority of as-ECAPed materials of the Fe-Cr alloy to recovered ones by heat treatment can be achieved with 8-10% Cr as observed in 20% Cr., International Journal of Corrosion, 2018, 01 Jan. 2018
  • Effect of Initial Grain Size Prior to ECAP-Cold Rolling Processing on the Riding and Form-ability of Ferritic Stainless Sheets
    Mitsuaki Adachi, Motohiro Yuasa, Hiroyuki Miyamoto, Hiroshi Fujiwara, Masaharu Hatano
    2017 The Japan Institute of Metals and Materials Equalchannel angular pressing?ECAP?was applied to hotbands by one pass prior to coldrolling and annealing in order to modify the texture, and improve the ridging and formability of ferritic stainless steel sheets. The present study focuses on the effect of initial grain size before ECAP, using the samples having extremely large grain size of 210 ?m and smaller ones of 30 ?m. The final grain sizes of coldrolled and annealed sheets were about 30 ?m for both processes. It was found that Rankford value?rvalue?of large grain size was higher compared with that of smaller one while ridging was alleviated in the latter. The recrystallization temperature of coldrolled sheets was about 50? lower in the larger grain size. It is considered that higher density of grainscale shear bands in the sample of larger grain size promotes recrystallization and reduction of ?001?//ND grains and increase ?111?//ND grains, resulting in higher rvalue. However, coarser arrangement of ?001?//ND colony parallel to the rolling direction in large grain size may causes higher ridging in spite of the lower fraction ?001?//ND grains., Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, 8252 - 57, 01 Jan. 2018
  • Recrystallization behavior and texture of high-purity niobium for SRF cavity
    Yuta Yamaguchi, Takumi Izumi, Takumi Izumi, Motohiro Yuasa, Hiroyuki Miyamoto, Masashi Yamanaka
    © 2018 The Japan Institute of Metals and Materials. Deformation and recrystallization behavior of pure niobium was investigated in order to clarify the origin of its low hydroformability despite its high ductility comparable with pure iron. Pure niobium exhibited lower strain hardening in cold rolling compared with pure iron. Furthermore, in postdeformation annealing, the hardness of niobium decreased monotonously with increasing temperature, and a typical sharp drop by recrystallization was not evident. This softening behavior was contrasted with the pure iron. It is suggested that niobium exhibits the socalled insitu recrystallization because of its low elastic modulus and low accumulative plastic strain energy. The low hydroformability of pure niobium sheets or tubes can be caused by its low strain hardening and insitu recrystallization which is associated with this recovered residual rolled texture., Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, 82262 - 268, 01 Jan. 2018
  • Transition of Dislocation Structures in Severe Plastic Deformation and Its Effect on Dissolution in Dislocation Etchant
    Muhammad Rifai, Ebad Bagherpour, Genki Yamamoto, Motohiro Yuasa, Hiroyuki Miyamoto
    © 2018 Muhammad Rifai et al. Transition of dislocation structures in ultrafine-grained copper processed by simple shear extrusion (SSE) and its effects on dissolution were manifested by simple immersion tests using a modified Livingston dislocation etchant, which attacks dislocations and grain boundaries selectively. The SSE process increased the internal strain evaluated by X-ray line broadening analysis until eight passes but decreased it with further extrusion until twelve passes. The weight loss in the immersion tests reflected the variation in the internal strain: namely, it increased until eight passes and then decreased with further extrusion to twelve passes. Taking our previous report on microstructural observation into account, it is suggested that variation in the internal strain is caused by both the variation in dislocation density and structural change of grain boundaries from equilibrium to nonequilibrium states or vice versa. Decreased dislocation density and structural change back to equilibrium state of grain boundaries in very high strain range by possibly dynamic recovery as pointed out by Dalla Torre were validated by X-ray and dissolution in the modified Livingston etchant in addition to the direct observation by TEM reported in our former report., Advances in Materials Science and Engineering, 2018, 01 Jan. 2018
  • Effects of solution treatment on corrosion properties of Mg6mass%Al1mass%Zn2mass%Ca (AZX612) and Mg6mass%Al1mass%Zn (AZ61) alloys
    Motohiro Yuasa, Xinsheng Huang, Kazutaka Suzuki, Naobumi Saito, Yasumasa Chino
    © 2018 The Japan Institute of Metals and Materials. The effects of solution treatment on the corrosion properties of Mg6 mass%Al1 mass%Zn2 mass%Ca (AZX612) alloy were investigated, and the results were compared with those for Mg6 mass%Al1 mass%Zn (AZ61) alloy. Solution treatment at 693 K for 48 h significantly reduced the corrosion rates of both AZX612 and AZ61 alloys in 5 mass% NaCl solution. After solution treatment, not only intermetallic phases but also the Al-rich ¡ phase around intermetallic phases reduced or dissolved in both alloys. The microstructural evolution induced by solution treatment may inhibit galvanic corrosion and pit-like corrosion, leading to improvement in the corrosion resistance of AZX612 and AZ61 alloys., Materials Transactions, 591173 - 1179, 01 Jan. 2018
  • Fabrication and anisotropic electronic property for oriented Li1+xyNb1−x−3yTix+4yO3solid solution by slip casting in a hig
    Hiromi Nakano, Shohei Furuya, Motohiro Yuasa, Tohru S. Suzuki, Hitoshi Ohsato
    © 2017 The Society of Powder Technology Japan The Li1+x−yNb1−x−3yTix+4yO3(0.06 ≤ x ≤ 0.33, 0 ≤ y ≤ 0.09) (hereafter LNT), forms a unique and periodical structure in the Li2O-Nb2O5-TiO2ternary system. In this work, toward application of the unique qualities of an electro-ceramic, we fabricated oriented LNT balk ceramics by slip casting in a strong magnetic field of 12 T using various sizes of particles. The c-axis of the LNT powders was aligned parallel to the magnetic field. As a result, we found anisotropic- and unique- electric properties which were caused by a superstructure with intergrowth layers of corundum-type [Ti2O3]2+. The Qf value parallel to the c-axis was about five times greater than that of perpendicular to the c-axis. We first clarified the mechanism showing that the anisotropic Qf value was caused by the anisotropic electron conductivity and the anisotropic bonding strength in the superstructure., Advanced Powder Technology, 282373 - 2379, 01 Sep. 2017
  • Deformation and recrystallization behavior of super high-purity niobium for SRF cavity
    Y. Yamaguchi, H. Doryo, M. Yuasa, H. Miyamoto, M. Yamanaka
    © Published under licence by IOP Publishing Ltd. Deformation and recyrstallization behavior of pure niobium was investigated in order to clarify the origin of its low hydro-formability despite of its high ductility comparable with pure iron. It was found that pure niobium exhibits lower strain hardening in cold rolling compared with pure iron. Furthermore, in post-deformation annealing, the hardness of niobium decreased monotonously with an increase of temperature, and the typical sharp drop by recrystallization was not evident. This softening behavior was contrasted with the high-purity iron. It is suggested that niobium exhibit the so-called in-situ recrystallization possibly because of low elastic modulus and low accumulative plastic strain energy in spite of high melting temperature. The low hydro-formability of pure niobium sheets or tubes is caused by its low strain hardening and its unique plastic anisotropy which is associated with this recovered residual rolled texture., IOP Conference Series: Materials Science and Engineering, 194, 08 May 2017
  • Improving hydro-formability of stainless steel tubes by tube channel pressing
    Y. Kitano, M. Yuasa, H. Miyamoto, M. H. Farshidi, E. Bagherpour
    © Published under licence by IOP Publishing Ltd. Tube channel pressing (TCP), which is one of the severe plastic deformation (SPD) technologies to refine grain size into submicron size for tubular materials, have been applied to ferritic stainless steel tubes for one pass, in order to alleviate ridging and enhance the hydro-formability. It was found that grain-scale shear bands were introduced by one-pass TCP, and texture and microstructure was successfully modified by promoting recrystallization of deformation microstructure, which is otherwise hard-to-recrystallize, in the post-TCP annealing. Elongation to failure, strain-hardening exponent (n-value) and Lankford values of both longitudinal and circumferential directions increased in comparison to with the tube fabricated by conventional process., IOP Conference Series: Materials Science and Engineering, 194, 08 May 2017
  • Effect of Grain Size on the Stress Corrosion Cracking of Ultrafine Grained Cu-10 wt% Zn Alloy in Ammonia
    Takuma Asabe, Muhammad Rifai, Motohiro Yuasa, Hiroyuki Miyamoto
    © 2017 Takuma Asabe et al. The effect of grain size in the micron to submicron range on the stress corrosion cracking (SCC) of Cu-10 wt% Zn alloys was investigated using constant-load tests in ammonia vapor. The grain size was systematically varied from 4 μm to 0.12 μm by either cold-rolling or equal-channel angular pressing (ECAP), followed by annealing. The time to fracture increased with decreasing grain size above 1 μm but then began to decrease with decreasing grain size into the submicron range. This inverse trend in the submicron range is discussed in terms of a severe plastic deformation- (SPD-) induced ultrafine grain microstructure., International Journal of Corrosion, 2017, 01 Jan. 2017
  • Effects of measurement conditions on ignition temperature of magnesium alloys
    Kazutaka Suzuki, Naobumi Saito, Xinsheng Huang, Motohiro Yuasa, Motohiro Yuasa, Yasumasa Chino
    © 2017 The Japan Institute of Light Metals The effects of process parameters such as air flow rate, heating rate, sample surface area per volume (specific surface area), and sample compositions on the ignition temperature of magnesium alloys, both with and without calcium, were investigated by using differential thermal analysis. For magnesium alloys without calcium, increases in the heating rate, air flow rate, and specific surface area all contributed to a decrease in the ignition temperature, while an increase in the aluminum concentration promoted an increase in the ignition temperature at least under the present experimental conditions used in the present study. For magnesium alloys with calcium, adding 2 mass% calcium contributed to a significant increase in the ignition temperature. The effects of the flow rate, specific surface area and aluminum concentration on the ignition temperature qualitatively led to the same tendencies in magnesium alloys both with and without calcium. For the air flow rate, however, the opposite trend was observed. In the present study, the ignition temperatures obtained were much higher than those described in the literature, most likely because of the large differences in the specific surface area., Materials Transactions, 581616 - 1623, 01 Jan. 2017
  • Stress corrosion cracking and corrosion resistance of Mg-6%Al-1%Zn-2%Ca extruded magnesium alloys
    Motohiro Yuasa, Motohiro Yuasa, Eitaro Yukutake, Xinsheng Huang, Kazutaka Suzuki, Naobumi Saito, Yasumasa Chino
    © 2017 The Japan Institute of Metals and Materials. Stress corrosion cracking (SCC) and corrosion resistance of Mg-6 mass%Al-1 mass%Zn-2 mass%Ca (AZX612) extruded alloy were investigated by slow strain rate tensile tests (SSRT) in 0.01 M NaCl solution and immersion tests in 5 mass% NaCl solution, and compared with those of Mg-6 mass%Al-1 mass%Zn (AZ61) extruded alloy. In the SSRT in the salt solution, as-received AZX612 exhibited lower elongation and higher SCC susceptibility than those of as-received AZ61, indicating that calcium addition in Mg-Al alloy deteriorated SCC resistance. On the other hand, after solution treatment, improvement of elongation and SCC susceptibility occurred in both the alloys. Observation of surface profiles for AZX612 and AZ61 after the SSRT in salt solution revealed that corrosion pits on surface likely initiated SCC in both the alloys. The results of immersion tests showed the same tendency with those of SSRT in salt solution. It is suggested that SCC resistance of AZX612 and AZ61 was likely related to the microstructural change accompanied with calcium addition and solution treatment such as the change in distributions of Al2Ca phase and Al-rich phase., Materials Transactions, 581257 - 1263, 01 Jan. 2017
  • Microstructure and mechanical properties of AZX912 magnesium alloy extruded at different temperatures
    Huang X, Chino Y, Yuasa M, Ueda H, Inoue M, Kido F, Matsumoto T.
    Materials Science and Engineering A, 679162 - 171, 2017
  • Stress corrosion cracking and corrosion resistance of Mg-6%Al-1%Zn-2%Ca extruded magnesium alloys
    Yuasa M, Yukutake E, Huang X, Suzuki K, Saito N, Chino Y.
    Keikinzoku/Journal of Japan Institute of Light Metals, 66(5)266 - 272, 2016
  • Effects of measurement conditions on ignition temperature of magnesium alloys
    Suzuki K, Saito N, Huang X, Yuasa M, Chino Y.
    Keikinzoku/Journal of Japan Institute of Light Metals, 66(5)273 - 279, 2016
  • Discharge properties of Mg–Al–Mn–Ca and Mg–Al–Mn alloys as anode materials for primary magnesium–air batteries
    Motohiro Yuasa, Xinsheng Huang, Kazutaka Suzuki, Mamoru Mabuchi, Yasumasa Chino
    Journal of Power Sources, Elsevier {BV}, 297449 , Nov. 2015
  • First-principles study of hydrogen-induced embrittlement in Fe grain boundary with Cr segregation
    Yuasa M, Hakamada M, Chino Y, Mabuchi M.
    ISIJ International, 55(5)1131 - 1134, 2015
  • Extraordinary diffusion in Co/Cu grain boundaries
    Nakano H, Yuasa M, Miyamoto H, Miyazawa N, Mabuchi M.
    Scripta Materialia, 10152 - 55, 2015
  • Enhanced room-temperature stretch formability of Mg0.2 mass%Ce alloy sheets processed by combination of high-temperature pre-annealing and warm rolling
    Suzuki K, Chino Y, Huang X, Yuasa M, Mabuchi M.
    Materials Transactions, 56(7)1096 - 1101, 2015
  • Effects of group II elements on the cold stretch formability of Mg-Zn alloys
    Yuasa M, Miyazawa N, Hayashi M, Mabuchi M, Chino Y.
    Acta Materialia, 83294 - 303, 2015
  • Effect of segregated elements on the interactions between twin boundaries and screw dislocations in Mg
    Yoshida T, Yuasa M, Mabuchi M, Chino Y.
    Journal of Applied Physics, 118(3), 2015
  • Rapid synthesis and structural analysis of Li-Nb-Ti-O solid solutions with superstructure by millimeter-wave heating
    Nakano H, Saji T, Yuasa M, Miyake S, Mabuchi M.
    Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, 119(1395)808 - 812, 2011
  • Effect of segregated Al on {1012} and {1011} twinning in Mg
    Miyazawa N, Yoshida T, Yuasa M, Chino Y, Mabuchi M.
    Journal of Materials Research, 30(23)3629 - 3641, 2015
  • Effects of segregated Cu on an Fe grain boundary by first-principles tensile tests
    Yuasa M, Mabuchi M.
    Journal of Physics Condensed Matter, 22(50), 2010
  • Saturation magnetization in supersaturated solid solution of Co-Cu alloy
    Yuasa M, Kajikawa K, Hakamada M, Mabuchi M.
    Applied Physics Letters, 95(16), 2009
  • Mechanical properties of nanocrystalline Co-Cu alloy with a nanoscale multilayer structure
    Yuasa M, Nakano H, Nakamoto Y, Kajikawa K, Kusuda H, Chen Y, Mabuchi M.
    The Minerals, Metals and Materials Society - 3rd International Conference on Processing Materials for Properties 2008, PMP III, 1143 - 148, 2009
  • Development of Nanocrystalline Co-Cu Alloys for Energy Applications
    Yuasa M, Nakano H, Mabuchi M.
    Green Energy and Technology, 44191 - 194, 2010
  • Deformation behavior of nanocrystalline Co-Cu alloys
    Yuasa M, Nakano H, Kajikawa K, Nakazawa T, Mabuchi M.
    Materials Research Society Symposium Proceedings, 12249 - 14, 2010
  • Anomalous mechanical characteristics of Au/Cu nanocomposite processed by Cu electroplating
    Hakamada M, Yuasa M, Mabuchi M.
    Philosophical Magazine, 95(14)1499 - 1510, 2015
  • Discharge properties of Mg-Al-Mn-Ca and Mg-Al-Mn alloys as anode materials for primary magnesium-air batteries
    Yuasa M, Huang X, Suzuki K, Mabuchi M, Chino Y.
    Journal of Power Sources, 297449 - 456, 2015
  • {1012} twins in the rolled Mg-Zn-Ca alloy with high formability
    Nakano H, Yuasa M, Chino Y, Mabuchi M.
    Journal of Materials Research, 29(24)3024 - 3031, 2014
  • Visible-light photocatalysis of ZnO deposited on nanoporous Au
    Hakamada M, Yuasa M, Yoshida T, Hirashima F, Mabuchi M.
    Applied Physics A: Materials Science and Processing, 114(4)1061 - 1066, 2014
  • Texture formation and room-temperature formability of rolled MgZnCe Alloys
    Chino Y, Huang X, Suzuki K, Yuasa M, Mabuchi M.
    Materials Transactions, 55(8)1190 - 1195, 2014
  • Microstructural and textural evolution of pure titanium during differential speed rolling and subsequent annealing
    Huang X, Suzuki K, Yuasa M, Chino Y.
    Journal of Materials Science, 49(8)3166 - 3176, 2014
  • Mechanical and chemical effects of solute elements on generalized stacking fault energy of Mg
    Yuasa M, Chino Y, Mabuchi M.
    Journal of Materials Research, 29(21)2576 - 2586, 2014
  • Interaction mechanisms of screw dislocations with {1011} and {1012} twin boundaries in Mg
    Yuasa M, Masunaga K, Mabuchi M, Chino Y.
    Philosophical Magazine, 94(3)285 - 305, 2014
  • Improved plastic anisotropy of Mg-Zn-Ca alloys exhibiting high-stretch formability: A first-principles study
    Yuasa M, Hayashi M, Mabuchi M, Chino Y.
    Acta Materialia, 65207 - 214, 2014
  • Effects of microstructure on discharge behavior of AZ91 Alloy as Anode for Mg-Air battery
    Yuasa M, Huang X, Suzuki K, Mabuchi M, Chino Y.
    Materials Transactions, 55(8)1202 - 1207, 2014
  • Atomic simulations of (101̄2), (101̄1) twinning and (101̄2)/ detwinning in magnesium
    Yuasa M, Hayashi M, Mabuchi M, Chino Y.
    Journal of Physics Condensed Matter, 26(1), 2014
  • Softening due to disordered grain boundaries in nanocrystalline Co
    Yuasa M, Hakamada M, Nakano H, Mabuchi M, Chino Y.
    Journal of Physics Condensed Matter, 25(34), 2013
  • Microstructure and mechanical properties of nanostructured Co-Cu alloy films processed by electrodeposition
    Yuasa M, Nakano H, Mabuchi M.
    Journal of Physics: Conference Series, 417(1), 2013
  • Interactions of a screw dislocation with a {1 0 1 ̄ 1}-{1 0 1 ̄ 2} double twin in Mg
    Yuasa M, Masunaga K, Yoshida T, Mabuchi M, Chino Y.
    Acta Materialia, 61(13)4714 - 4725, 2013
  • First-principles study in Fe grain boundary with Al segregation: Variation in electronic structures with straining
    Yuasa M, Mabuchi M.
    Philosophical Magazine, 93(6)635 - 647, 2013
  • Effects of initial microstructure on the microstructural evolution and stretch formability of warm rolled Mg-3Al-1Zn alloy sheets
    Huang X, Suzuki K, Yuasa M, Chino Y.
    Materials Science and Engineering A, 587150 - 160, 2013
  • Atomic simulations of GB sliding in pure and segregated bicrystals
    Yuasa M, Chino Y, Mabuchi M.
    Materials Research Society Symposium Proceedings, 151513 - 18, 2013
  • Hydrogen embrittlement in a magnesium grain boundary: A first-principles study
    Yuasa M, Nishihara D, Mabuchi M, Chino Y.
    Journal of Physics Condensed Matter, 24(8), 2012
  • Grain boundary sliding in pure and segregated bicrystals: A molecular dynamics and first principles study
    Yuasa M, Nakazawa T, Mabuchi M.
    Journal of Physics Condensed Matter, 24(26), 2012
  • Grain boundary embrittlement of Fe induced by P segregation: First-principles tensile tests
    Yuasa M, Mabuchi M.
    Advanced Materials Research, 409455 - 460, 2012
  • Enhanced grain boundary embrittlement of an Fe grain boundary segregated by hydrogen (H)
    Yuasa M, Amemiya T, Mabuchi M.
    Journal of Materials Research, 27(12)1589 - 1597, 2012
  • First-principles study on enhanced grain boundary embrittlement of iron by phosphorus segregation
    Yuasa M, Mabuchi M.
    Materials Transactions, 52(7)1369 - 1373, 2011
  • Deformation behavior of an ultrafine grained two phase Co-Cu alloy processed by electrodeposition
    Yuasa M, Kajikawa K, Nakazawa T, Hakamada M, Mabuchi M.
    Scripta Materialia, 63(1)132 - 135, 2010
  • Bond mobility mechanism in grain boundary embrittlement: First-principles tensile tests of Fe with a P-segregated Σ3 grain boundary
    Yuasa M, Mabuchi M.
    Physical Review B - Condensed Matter and Materials Physics, 82(9), 2010
  • Atomic simulations of dislocation emission from Cu/Cu and Co/Cu grain boundaries
    Yuasa M, Nakazawa T, Mabuchi M.
    Materials Science and Engineering A, 528(1)260 - 267, 2010
  • Atomic simulation of grain boundary sliding in Co/Cu two-phase bicrystals
    Yuasa M, Nakazawa T, Mabuchi M.
    Materials Science and Engineering A, 527(10-11)2629 - 2636, 2010
  • Ferromagnetic properties of Co-Cu alloy with nanoscale lamellar structure
    Yuasa M, Nakano H, Nakamoto Y, Hakamada M, Mabuchi M.
    Materials Transactions, 50(2)419 - 422, 2009
  • Effect of annealing on mechanical properties and nanoscale lamellar structure in Co-Cu alloy
    Yuasa M, Nakano H, Nakamoto Y, Mabuchi M.
    Materials Transactions, 50(3)570 - 578, 2009
  • Changes in the grain boundaries of a nanolamellar structured Co-Cu alloy by annealing
    Nakano H, Yuasa M, Mabuchi M.
    Scripta Materialia, 61(4)371 - 374, 2009
  • Mechanical properties of a nanocrystalline Co-Cu alloy with a high-density fine nanoscale lamellar structure
    Nakamoto Y, Yuasa M, Chen Y, Kusuda H, Mabuchi M.
    Scripta Materialia, 58(9)731 - 734, 2008
  • Effects of vacancies on deformation behavior in nanocrystalline nickel
    Yuasa M, Matsumoto H, Hakamada M, Mabuchi M.
    Materials Transactions, 49(10)2315 - 2321, 2008
  • A superelastic nanocrystalline Cu-Sn alloy thin film processed by electroplating
    Yuasa M, Kajikawa K, Hakamada M, Mabuchi M.
    Materials Letters, 62(29)4473 - 4475, 2008