Yoshimasa TAKAHASHI (in Sattelbogen, Germany)
Dr. Y. Takahashi received his B.S. from Kyoto University in 1997 (Faculty
of Mechanical Engineering), and his M.S. from Kyoto University in 1999
(Department of Mechanical Engineering and Science). After his carrier as
a corporate research engineer in HRL (Hitachi Research Laboratory), he
started his doctoral course in 2004. He received his Ph.D from Kyoto University
in 2007 (Department of Mechanical Engineering and Science). He then joined
AIST (National Institute of Advanced Industrial Science and Technology,
Japan) as a postdoctoral fellow. In 2011, he started his carrier as an
assistant professor of Kansai University (Department of Mechanical Engineering).
He was promoted to an associate professor in 2013 and a full professor
in 2020. He stayed in FAU (Friedrich-Alexander Universität), Germany as
a guest reseacher from 2019.9 to 2020.7. Prof. Takahashi has been invited
by Nagoya University (IMaSS) as an associate professor (2019~2020), then
as a professor (2021~).
His academic research interest has been, in simple words, the strength
of materials. He originally engaged in the study of small cracks in CFRPs
(under the guidance of Profs. R. Ohtani and T. Kitamura in Kyoto University)
during his M.S. course. As a research engineer in HRL, he engaged in the
structural integrity of semiconductor device packages for harsh environmental
use. His dissertation work (with Profs. T. Kitamura and H. Hirakata in
Kyoto University) was targeted to reveal the applicability of the fracture
mechanics criterion to sub-micrometer structures. He then extended his
study field to cover metal fatigue/embrittlement (with Profs. H. Noguchi,
K. Higashida and M. Tanaka in Kyushu University), particularly by leveraging
his expertise in ion beam processing.
As an independent researcher, he is currently engaged in three major
study categories (⇒Research) based on his variety of experiences. He has collaborated with Nagoya
University (Emeritus Prof. N. Tanaka, Profs. S. Muto and S. Arai) in the
field of applied electron-microscopy. He has also collaborated with JEOL
Ltd., Kobe Steel Ltd., Nippon Steel Corporation Ltd. and Chubu Electric
Power Ltd. regarding micro-mechanical testing and the analyses of fatigue
mechanisms under various conditions. He is a member of JSME (Japan Society of Mechanical Engineers), JSMS (The Society of Materials Science, Japan) and JSM (The Japan Society of Microscopy).
[Study keywords]
Strength of materials, Fracture mechanics, Fatigue, Hydrogen embrittlement,
Creep, Thin films, Interfaces, Gain boundaries, Dislocations, Strain-aging,
Aluminum alloys, Steels, Superalloys, Micro-components, Micro-mechanism,
TEM, SEM, FIB, In-situ testing
[Publications]
Yukihiko Izumi, Ken-ichi Saitoh, Tomohiro Sato, Masanori Takuma, Yoshimasa Takahashi, Shear deterioration of the hierarchical structure of cellulose microfibrils under water condition: all-atom molecular dynamics analysis, Applied Mechanics, Vol. 4, 2023, pp. 230–247.
https://doi.org/10.3390/applmech4010013
Yoshimasa Takahashi, Daisuke Kobayashi, Shintaro Fujii, Masanori Takuma, Kenichi Saitoh, Tomohiro Sato, Time-dependent crack growth mechanism in Ni-based single crystal superalloys at high-temperature, Materials Science & Engineering A, Vol. 859, 2022, 144179.
https://doi.org/10.1016/j.msea.2022.144179
Tomohiro Sato, Hiroki Asada, Ken–ichi Saitoh, Masanori Takuma, Yoshimasa Takahashi, Impact and ｆrictional properties of sulfide–dispersed Ni bronze affected by heat treatment, Journal of Japan Institute of Copper (in Japanese), Vol. 61, 2022, pp. 97–102.
https://doi.org/10.34562/jic.61.1_97
Masanori Takuma, Ken-ichi Saitoh, Yoshimasa Takahashi, Tomohiro Sato, Study on evaluation of wall thinning in a structural member using Lamb waves: mode separation using the MARS method, Science and Technology Reports of Kansai University, No. 62, 2023, pp. 23-34.
Yoshimasa Takahashi, Kaname Kishimoto, Yusuke Morii, Shigeo Arai, Kimitaka
Higuchi, Shunsuke Muto, Interfacial fracture initiation strength of micro-scale
Si/Cu components with different geometries: applicability of the fracture
mechanics criterion, Engineering Fracture Mechanics, Vol. 267, 2022, 108439.
https://doi.org/10.1016/j.engfracmech.2022.108439
Masanori Takuma, Tomohiro Sato, Ken-ichi Saitoh, Yoshimasa Takahashi, Yoshimasa
Hirai, Study on damage evaluation of bimetal with the lead-free copper
alloy (Life evaluation in bending fatigue test with AE method)，Transactions
of the JSME (in Japanese)，Vol. 88，No. 908，2022，ID: 22-00019.
https://doi.org/10.1299/transjsme.22-00019
Ken-ichi Saitoh, Yoshihiro Takai, Tomohiro Sato, Masanori Takuma, Yoshimasa
Takahashi, Optimization of LIB electrolyte and exploration of novel compounds
by using molecular dynamics method, Batteries, Vol. 8, 2022, 27.
https://doi.org/10.3390/batteries8030027
Tomohiro Sato, Shuhei Ishikawa, Ken-ichi Saitoh, Masanori Takuma, Yoshimasa
Takahashi, Evaluation of Sulfides as Solid Lubricant: Lubricity of Compounded
Sulfides, Key Engineering Materials, Vol. 901, 2021, pp. 164–169.
https://doi.org/10.4028/www.scientific.net/KEM.901.164
Tomohiro Sato, Atsuto Kubota, Ken-ichi Saitoh, Masayoshi Fuji, Chika Takai,
Hadi Sena, Masanori Takuma, Yoshimasa Takahashi，Molecular Dynamics Analysis
on Silica Interface Modeled in Surface Grinding Process for Non-Firing
Solidification，Journal of the Society of Materials Science, Japan，Vol.
71, No.2, 2022, pp. 167–174.
https://doi.org/10.2472/jsms.71.167
Daiki Kuribayashi, Tomohiro Sato, Ken-ichi Saitoh, Masanori Takuma, Yoshimasa
Takahashi，Pseudo Generation of Metallographic Images and Verification of
Superiority for Discrimination Problems -Applying Adversarial Generative
Networks-，Journal of the Japan Society of Powder and Powder Metallurgy，
Vol. 68, No. 8, 2021, pp. 317–323.
https://doi.org/10.2497/jjspm.68.317
Tomohiro Sato, Hiroki Asada, Ken–ichi Saitoh, Masanori Takuma, Yoshimasa
Takahashi, Effects of Heat Treatment for Cu–Ni–Sn–S Alloys, Journal of
Japan Institute of Copper, Vol. 60, No. 1, 2021, pp. 87–92.
https://doi.org/10.34562/jic.60.1_87
Tomohiro Sato, Akihiro Jingu, Ken-ichi Saitoh, Masanori Takuma, Yoshimasa
Takahashi, Friction Properties of Sintered Al Bronze Containing Dispersed
Sulfides, Transactions of Powder Metallurgy Association of India, Vol.45
No.2, December 2019, pp.39-50, 2021
Tomohiro Sato, Atsuto Kubota, Ken-ichi Saitoh, Masayoshi Fuji, Chika Takai,
Hadi Sena, Masanori Takuma, Yoshimasa Takahashi, Molecular dynamics study
on SiO2 interfaces of nonfiring solids, Journal of Nanomaterials, Vol.
2020, ID 8857101.
https://doi.org/10.1155/2020/8857101
Ken-ichi Saitoh, Tomohiro Sato, Masanori Takuma, Yoshimasa Takahashi, Molecular
dynamics study of collagen fibrils: relation between mechanical properties
and molecular chirality, Journal of Biomaterials and Nanobiotechnology,
Vol. 11, 2020, pp.260-278.
https://doi.org/10.4236/jbnb.2020.114017
Yoshimasa Takahashi, Daisuke Kobayashi, Masaki Kashihara, Tomoyuki Kozawa,
Shigeo Arai, Electron-microscopic analyses on high-temperature fatigue
crack growth mechanism in a Ni-based single crystal superalloy, Materials
Science & Engineering A, Vol. 793, 2020, 139821.
https://doi.org/10.1016/j.msea.2020.139821
Nobuo Tanaka, Takeshi Fujita, Yoshimasa Takahashi, Jun Yamasaki, Kazuyoshi
Murata, Shigeo Arai, Progress in environmental high-voltage transmission
electron microscopy for nanomaterials, Philosophical Transactions of the
Royal Society A，RSTA20190602.
http://doi.org/10.1098/rsta.2019.0602
Ken-ichi Saitoh, Tomohiro Sato, Masanori Takuma, Yoshimasa Takahashi, Molecular
dynamics study of collagen fibrils: relation between mechanical properties
and molecular chirality, Journal of Biomaterials and Nanobiotechnology,
Vol. 11, 2020, pp.260-278.
https://doi.org/10.4236/jbnb.2020.114017
Yoshimasa Takahashi, Ryosuke Kuriki, Jun Kurihara, Tomoyuki Kozawa, Takahiro
Shikama, Hiroshi Noguchi, Distinct fatigue limit of a 6XXX series aluminum
alloy in relation to crack tip strain-aging, Materials Science & Engineering
A, Vol. 785, 2020, 139378.
https://doi.org/10.1016/j.msea.2020.139378
Taiki Yamada, Masahiro Ohtsuka, Yoshimasa Takahashi, Haruhiko Yoshino,
Shin-ichi Amma, Shunsuke Muto, Measurement of nanoscale local stress distribution
in phase-separated glass using scanning transmission electron microscopy-cathodoluminescence,
Materialia, Vol. 9, 2020, 100578
https://doi.org/10.1016/j.mtla.2019.100578
Thanh Thuong Huynh, Motomichi Koyama, Yoshimasa Takahashi, Shigeru Hamada,
Kaneaki Tsuzaki, Hiroshi Noguchi, Plastic deformation sequence and strain
gradient characteristics of hydrogen-induced delayed crack propagation
in single-crystal Fe-Si alloy, Scripta Materialia, Vol. 178, 2020, pp.
99-103.
https://doi.org/10.1016/j.scriptamat.2019.11.012
Keisuke Oosumi, Masanori Takuma, Kenichi Saitoh, Yoshimasa Takahashi, Tomohiro
Sato, Ken Yamamoto, Study on evaluation of rail axial stress with ultrasonic
wave method (Application of wavelet transform results), Transactions of
the JSME Series A (in Japanese), Vol. 85, 2019, ID: 19-00206
https://doi.org/10.1299/transjsme.19-0020
Kentaro Takada, Ken-ichi Saitoh, Tomohiro Sato, Masanori Takuma, Yoshimasa
Takahashi, Molecular dynamics study on transmission mechanism of torsional
deformation in cellulose nanofibers with hierarchical structure, Soft Nanoscience
Letters, Vol. 9, 2019, pp. 45-57
https://doi.org/10.4236/snl.2019.94004
Takashi Sumigawa, Shin Uegaki, Tetsuya Yukishita, Shigeo Arai, Yoshimasa
Takahashi, Takayuki Kitamura, FE-SEM In Situ Observation of Damage Evolution
in Tension-Compression Fatigue of Micro-sized Single-Crystal Copper, Materials
Science & Engineering A, Vol. 764, 2019, 138218
https://doi.org/10.1016/j.msea.2019.138218
Syuhei Ishikawa, Tomohiro Sato, Ken-ichi Saitoh, Masanori Takuma, Yoshimasa
Takahashi, Fundamental study on functionality of synthetic sulfides -Evaluation
of metal sulfides as solid lubricant-, Jurnal Tribologi, Vol.20, 2019,
pp. 26-38
Ken-ichi Saitoh, Kosuke Oda, Koki Yoshida, Masanori. Takuma, Yoshimasa
Takahashi, Tomohiro Sato, Atomistic simulation of heavily plastic deformation
of pearlitic steel: nano-sized processes of wiredrawing and indentation,
IOP Conference Series: Materials Science Engineering Vol. 461, 2019, 012074
https://doi.org/10.1088/1757-899X/461/1/012074
Yukihiko Kimura, Yoshimasa Takahashi, Taizo Makino, Takanori Kato, Shigeo
Arai, Microscopic analysis of non-propagating fatigue crack tips, International
Journal of Fatigue, Vol. 125, 2019, pp. 122–127.
https://doi.org/10.1016/j.ijfatigue.2019.03.043
Ken-ichi Saitoh, Koki Yoshida, Kosuke Oda, Tomohiro Sato, Masanori Takuma,
Yoshimasa Takahashi, Molecular dynamics study on nano-sized wiredrawing:
possible atomistic process and application to pearlitic steel wire, IOP
Conference Series: Materials Science Engineering Vol. 307, 2018, 012039
https://doi.org/10.1088/1757-899X/307/1/012039
Yoshimasa Takahashi, Ryosuke Kuriki, Masaki Kashihara, Takahiro Shikama,
Hiroshi Noguchi, Emergence of distinct fatigue limit: impact of excess
solute magnesium in 6061-T6 alloy, Procedia Structural Integrity, Vol.
13, 2018, pp. 1010–1013.
https://doi.org/10.1016/j.prostr.2018.12.188
Ken-ichi Saitoh, Kohei Kuramitsu, Tomohiro Sato, Masanori Takuma, Yoshimasa
Takahashi, Molecular Dynamics Study on Deformation Mechanism of Grain Boundaries
in Magnesium Crystal: Based on Coincidence Site Lattice Theory, Journal
of Materials, Vol. 2018, Article ID 4153464
https://doi.org/10.1155/2018/4153464
Yoshimasa Takahashi, Itaru Ashida, Shigeo Arai, Kimitaka Higuchi, Yuta
Yamamoto, Shunsuke Muto, Interfacial fracture strength evaluation of Cu/SiN
micro-components: applicability of the linear fracture mechanics criterion
under a hydrogen environment, International Journal of Fracture, Vol. 210,
2018, pp. 223–231.
https://doi.org/10.1007/s10704-018-0269-8
Yoshimasa Takahashi, Kosuke Inoue, Masanori Takuma, Kenichi Saitoh, Tomohiro
Sato, Fracture mechanics criterion of time-dependent crack initiation from
interface free-edge in adhesively bonded butt joints, Engineering Fracture
Mechanics, Vol. 186, 2017, pp. 368–377.
https://doi.org/10.1016/j.engfracmech.2017.08.017
Yoshimasa Takahashi, Microscopic analyses of deformation structures around
fatigue crack tips, JEOL news, Vol. 51, 2016, pp. 16–21.
Yoshimasa Takahashi, Kazuya Aihara, Itaru Ashida, Kimitaka Higuchi, Yuta
Yamamoto, Shigeo Arai, Shunsuke Muto, Nobuo Tanaka, Evaluation of interfacial
fracture strength in micro-components with different free-edge shape, Mechanical
Engineering Journal, Vol. 3, No. 6, 2016, ID: 16-00108
https://doi.org/10.1299/mej.16-00108
Shigeo Arai, Yoshimasa Takahashi, Takefumi Amino, Kaname Yoshida, Yuta
Yamamoto, Kimitaka Higuchi, Tsunehisa Yamamoto, Shunsuke Muto, Gaseous
environmental in-situ observation by Reaction-Science High-Voltage Electron
Microscope, Kinzoku (AGNE Gijutsu Center Inc.) (in Japanese), Vol. 86,
2016, No. 12, pp. 1085–1090.
Tomohiro Sato, Takehiro Muraoka, Kenichi Saitoh, Masanori Takuma, Yoshimasa
Takahashi, Yoshimasa Hirai, Evaluation of radial crushing strength on Bronze
sintered in vacuum atmosphere -effect of sulfide and tin-, Journal of the
Japan Society of Powder and Powder Metallurgy (in Japanese), Vol. 63, No.
5, 2016, pp. 255–260.
https://doi.org/10.2497/jjspm.63.255
Masanori Takuma, Naoto Yamashita, Shigeru Matsuda, Yoshinori Asagoe, Yuu
Hinohara, Keisuke Oosumi, Kenichi Saitoh, Yoshimasa Takahashi, Tomohiro
Sato, Study on damage evaluation of magnesium alloy with acoustic emission
method (Discrimination of {1012} and {1011} twin), Transactions of the
JSME (in Japanese), Vol. 82, No. 839, 2016, ID: 16-00027
https://doi.org/10.1299/transjsme.16-00027
Yoshimasa Takahashi, Kazuya Aihara, Itaru Ashida, Masanori Takuma, Kenichi
Saitoh, Tomohiro Sato, Kimitaka Higuchi, Yuta Yamamoto, Shigeo Arai, Shunsuke
Muto, Interfacial fracture strength property of micro-scale SiN/Cu components,
Procedia Structural Integrity, Vol. 2, 2016, pp. 1367–1374.
Yoshimasa Takahashi, Hikaru Kondo, Ryo Asano, Shigeo Arai, Kimitaka Higuchi,
Yuta Yamamoto, Shunsuke Muto, Nobuo Tanaka, Direct evaluation of grain
boundary hydrogen embrittlement: a micro-mechanical approach, Materials
Science & Engineering A, Vol. 661, 2016, pp. 211–216.
https://doi.org/10.1016/j.msea.2016.03.035
Yoshimasa Takahashi, Hikaru Kondo, Kazuya Aihara, Masanori Takuma, Kenichi
Saitoh, Shigeo Arai, Shunsuke Muto, Yuta Yamamoto, Kimitaka Higuchi, Nobuo
Tanaka, Interfacial fracture strength of micro-scale Si/Cu components with
different free-edge shape, Key Engineering Materials, Vol. 665, 2016, pp.
169–172.
https://doi.org/10.4028/www.scientific.net/KEM.665.169
Keisuke Oosumi, Shigeru Matsuda, Masanori Takuma, Kenichi Saitoh, Yoshimasa
Takahashi, Yoshinori Asagoe, Naoto Nakanishi, Study on evaluation of damage
for magnesium alloy with acoustic emission (Influences of heat history
and corrosion), Transactions of the JSME (in Japanese), Vol. 81, No. 823,
2015, ID: 14-00541
https://doi.org/10.1299/transjsme.14-00541
Ken-ichi Saitoh, Tomohiro Sato, Masanori Takuma, Yoshimasa Takahashi, Ryuketsu
Chin, Molecular dynamics study on lubrication mechanism in crystalline
structure between copper and sulfur, Journal of Materials, Vol. 2015, Article
ID 963257
https://doi.org/10.1155/2015/963257
Yoshimasa Takahashi, Takahiro Shikama, Ryota Nakamichi, Yuji Kawata, Naoki
Kasagi, Hironari Nishioka, Syuzaburo Kita, Masanori Takuma, Hiroshi Noguchi,
Effect of additional magnesium on mechanical and high-cycle fatigue properties
of 6061–T6 alloy, Materials Science & Engineering A, Vol. 641, 2015,
pp. 263–273.
https://doi.org/10.1016/j.msea.2015.06.051
Yoshimasa Takahashi, Shigeo Arai, Yuta Yamamoto, Kimitaka Higuchi, Hikaru
Kondo, Yu Kitagawa, Shunsuke Muto, Nobuo Tanaka, Evaluation of interfacial
fracture strength in micro-scale components combined with high-voltage
environmental electron microscopy, Experimental Mechanics, Vol. 55, 2015,
pp. 1047-1056.
https://doi.org/10.1007/s11340-015-0008-2
Yoshimasa Takahashi, Hiroaki Yoshitake, Ryota Nakamichi, Takuya Wada, Masanori
Takuma, Takahiro Shikama, Hiroshi Noguchi, Fatigue limit investigation
of 6061-T6 aluminium alloy in giga-cycle regime, Materials Science &
Engineering A, Vol. 614, 2014, pp. 243-249.
https://doi.org/10.1016/j.msea.2014.07.039
Takahiro Shikama, Shinji Yoshihara, Yoshimasa Takahashi, Hiroshi Noguchi,
Analysis of small fatigue crack in Al-Mg-Si Aluminum alloy, Materials Science
Forum, Vols. 794-796, 2014, pp. 313-318.
https://doi.org/10.4028/www.scientific.net/MSF.794-796.313
Kenichi Saitoh, Yohei Sameshima, Masanori Takuma, Yoshimasa Takahashi,
Atomistic simulation of crystal change and carbon diffusion during drawing
of pearlitic steel nano-sized wire, Technische Mechanik, Vol. 34, 2014,
pp. 222-232.
https://doi.org/10.24352/UB.OVGU-2017-064
Satoshi Iwata, Masanori Takuma, Kenichi Saitou, Junki Matsui, Yoshimasa
Takahashi, Yuto Tsuzuki, Study on AE properties of A6061-T6 alloy for high-pressure
hydrogen gas container during tensile and fatigue testing (Influence of
grain size), Transactions of the JSME (in Japanese), Vol. 80, No. 818,
2014, SMM0292(No. 14-00198)
https://doi.org/10.1299/transjsme.2014smm0292
Toshinori Sasaki, Masanori Takuma, Kenichi Saitoh, Tomohiro Saato, Yoshimasa
Hirai, Shinichi Sayama, Yoshimasa Takahashi, Study on damage evaluation
of bimetal with lead-free copper alloy (Application of Acoustic Emission
method), Transactions of the JSME (in Japanese), Vol. 80, No. 813, 2014,
SMM0112
https://doi.org/10.1299/transjsme.2014smm0112
Masanori Takuma, Shigeyoshi Hisada, Kenichi Saitoh, Yoshimasa Takahashi,
Yuuki Kobayashi, Akira Kadono, Atushi Murata, Satoshi Iwai and Toshinori
Sasaki, Acoustic Emission Measurement by Fiber Bragg Grating Glued to Cylindrical
Sensor Holder, Advances in Materials Science and Engineering, Vol. 2014,
Article ID 274071.
https://doi.org/10.1155/2014/274071
Yoshimasa Takahashi, Hikaru Kondo, Hironobu Niimi, Takeshi Nokuo, Toshiaki
Suzuki, Fracture strength analysis of single-crystalline silicon cantilevers
processed by focused ion beam, Sensors & Actuators: A. Physical, Vol.
206, 2014, pp. 81–87.
https://doi.org/10.1016/j.sna.2013.11.037
Yoshimasa Takahashi, Hiroaki Yoshitake, Takahiro Shikama, Hiroshi Noguchi,
Masanori Takuma, Giga-cycle property of a new age-hardened aluminium alloy
containing excess solute magnesium, Key Engineering Materials, Vols. 577-578,
2014, pp. 293–296.
https://doi.org/10.4028/www.scientific.net/KEM.577-578.293
Junji Sakamoto, Yoshimasa Takahashi, Yuuta Aono, Hiroshi Noguchi, Method
for assessing applicability of an artificial flaw as a small initial crack
for fatigue limit evaluation and its application to a drill hole and an
FIB processed sharp notch in annealed 0.45% carbon steel, Journal of Testing
and Evaluation, Vol. 41, 2013, JTE20120176
https://doi.org/10.1520/JTE20120176
Yoshimasa Takahashi, Takahiro Shikama, Hiroshi Noguchi, Micro-analyses
of small cracks in 6061-T6 aluminium alloy subjected to high-cycle fatigue,
Key Engineering Materials, Vols. 525-526, 2013, pp. 213-216.
https://doi.org/10.4028/www.scientific.net/KEM.525-526.213
Lei Zeng, Takahiro Shikama, Yoshimasa Takahashi, Shinji Yoshihara, Tadashi
Aiura, Hiroshi Noguchi, Fatigue limit of new precipitation-hardened aluminium
alloy with distinct fatigue crack propagation limit, International Journal
of Fatigue, Vol. 44, 2012, pp. 32–40.
https://doi.org/10.1016/j.ijfatigue.2012.06.001
Takahiro Shikama, Yoshimasa Takahashi, Lei Zeng, Shinji Yoshihara, Tadashi
Aiura, Kenji Higashida, Hiroshi Noguchi, Distinct fatigue crack propagation
limit of new precipitation-hardened aluminium alloy, Scripta Materialia,
Vol. 67, 2012, pp. 49–52.
https://doi.org/10.1016/j.scriptamat.2012.03.018
Yoshimasa Takahashi, Takahiro Shikama, Shinji Yoshihara, Tadashi Aiura,
Hiroshi Noguchi, Study on dominant mechanism of high-cycle fatigue life
in 6061-T6 aluminum alloy through micro-analyses of microstructurally small
cracks, Acta Materialia, Vol. 60, 2012, pp. 2554–2567.
https://doi.org/10.1016/j.actamat.2012.01.023
Junji Sakamoto, Yoshimasa Takahashi, Hiroshi Noguchi, Small fatigue crack
growth behavior from artificial notch with focused ion beam in annealed
0.45% carbon steel, Key Engineering Materials, Vols. 488–489, 2012, pp.
319–322.
https://doi.org/10.4028/www.scientific.net/KEM.488-489.319
Toshiaki Suzuki, Yoshimasa Takahashi, Specimen Preparation Methods with
FIB for In-Situ TEM Observations in Materials Science –TEM Specimen Preparation
by FIB with Glass Manipulator–, Materia Japan (in Japanese), Vol. 51, 2012,
No. 12, pp. 545–551.
https://doi.org/10.2320/materia.51.545
Masanori Takuma, Noboru Shinke, Yoshimasa Takahashi, Keishi Fujii, Naoto
Yamashita, Study on evaluation of melting conditions of irradiation part
by YAG laser (2nd report, relationships between features of AE signals
and melting conditions by irradiation conditions), Transactions of the
JSME (in Japanese), Vol. 77, 2011, pp. 1518–1526.
https://doi.org/10.1299/kikaia.77.1518
Hide-aki Nishikawa, Yasuji Oda, Yoshimasa Takahashi, Hiroshi Noguchi, Microscopic
observation of the brittle-striation formation mechanism in low carbon
steel fatigued in hydrogen gas (TEM and EBSD observation corresponding
to fractography), Journal of Solid Mechanics and Materials Engineering,
Vol. 5, 2011, pp. 179–190.
https://doi.org/10.1299/jmmp.5.179
Yoshimasa Takahashi, Junji Sakamoto, Masaki Tanaka, Kenji Higashida, Hiroshi
Noguchi, Effect of hydrogen on dislocation structures around a mixed-mode
fatigue crack tip in a single-crystalline iron-silicon alloy, Scripta Materialia,
Vol. 64, 2011, pp. 721–724.
https://doi.org/10.1016/j.scriptamat.2010.12.032
Yoshimasa Takahashi, Keigo Yamaguchi, Masaki Tanaka, Kenji Higashida, Hiroshi
Noguchi, On the micro-mechanism of hydrogen-assisted cracking in a single-crystalline
iron-silicon alloy thin sheet, Scripta Materialia, Vol. 64, 2011, pp. 537–540.
https://doi.org/10.1016/j.scriptamat.2010.11.035
Yoshimasa Takahashi, Junji Sakamoto, Masaki Tanaka, Kenji Higashida, Hiroshi
Noguchi, Characterization of dislocation structures around a mixed-mode
fatigue crack tip in a single-crystalline iron-silicon alloy, Scripta Materialia,
Vol. 64, 2011, pp. 157–160.
https://doi.org/10.1016/j.scriptamat.2010.09.033
Yoshimasa Takahashi, Masaki Tanaka, Kenji Higashida, Kazuhiro Yasuda, Sho
Matsumura, Hiroshi Noguchi, A combined environmental straining specimen
holder for high-voltage electron microscopy, Ultramicroscopy, Vol. 110,
2010, pp. 1420–1427.
https://doi.org/10.1016/j.ultramic.2010.07.011
Yoshimasa Takahashi, Hideaki Nishikawa, Yasuji Oda and Hiroshi Noguchi,
Microscopic characterization of hydrogen-induced quasi-brittle fatigue
fracture in low-strength carbon steel, Materials Letters, Vol. 64, 2010,
pp. 2416–2419.
https://doi.org/10.1016/j.matlet.2010.08.019
Yoshimasa Takahashi, Junji Sakamoto, Masaki Tanaka, Kenji Higashida, Hiroshi
Noguchi, TEM Analysis on the effect of hydrogen on cyclic deformation around
an oblique fatigue crack tip in single-crystalline Fe-3.2wt.%Si alloy,
Transactions of the JSME Series A (in Japanese), Vol. 76, 2010, No. 767,
pp. 1002–1004.
https://doi.org/10.1299/kikaia.76.1002
Yoshimasa Takahashi, Junji Sakamoto, Masaki Tanaka, Kenji Higashida, Hiroshi
Noguchi,TEM Observation of Cyclic Deformation around an Oblique Fatigue
Crack Tip in Single-crystalline Fe-3.2wt.%Si Alloy, Transactions of the
JSME A (in Japanese), Vol. 76, 2010, No. 762, pp. 251–253.
https://doi.org/10.1299/kikaia.76.251
Yoshimasa Takahashi, Masaki Tanaka, Kenji Higashida, Keigo Yamaguchi, Hiroshi
Noguchi, An intrinsic effect of hydrogen on cyclic slip deformation around a
{110} fatigue crack in Fe-3.2 wt.% Si alloy, Acta Materialia, Vol. 58,
2010, pp. 1972–1981.
https://doi.org/10.1016/j.actamat.2009.11.040
Yoshimasa Takahashi, Masaki Tanaka, Kenji Higashida, Keigo Yamaguchi, Hiroshi
Noguchi, HVEM Analysis of Slip Behavior around a Fatigue Crack Tip, Materia
Japan (in Japanese), Vol. 48, No. 12, 2009, p. 609.
https://doi.org/10.2320/materia.48.609
Yoshimasa Takahashi, Masaki Tanaka, Kenji Higashida, Hiroshi Noguchi, Effect
of hydrogen on microscopic deformation process near Stage II fatigue crack
tip, Effects of Hydrogen on Materials, B. Somerday, P. Sofronis, R. Jones
eds, ASM International, OH, 2009, pp. 203–210.
Yoshimasa Takahashi, Masaki Tanaka, Kenji Higashida, Keigo Yamaguchi, Hiroshi
Noguchi, Effect of Gaseous Hydrogen on Cyclic Slip Behavior Around a Fatigue
Crack Tip in Fe-3.2wt.%Si Single-Crystalline Alloy, Transactions of the
JSME Series A (in Japanese), Vol. 75, 2009, pp. 1082–1089.
https://doi.org/10.1299/kikaia.75.1082
Yoshimasa Takahashi, Masaki Tanaka, Kenji Higashida, Hiroshi Noguchi, Hydrogen-induced
slip localization around a quasi-brittle fatigue crack observed by high-voltage
electron microscopy, Scripta Materialia, Vol. 61, 2009, pp. 145–148.
https://doi.org/10.1016/j.scriptamat.2009.03.020
Yoshimasa Takahashi, Masaki Tanaka, Kenji Higashida, Hiroshi Noguchi, High-voltage
electron-microscopic observation of cyclic slip behavior around a fatigue
crack tip in an iron alloy, Scripta Materialia, Vol. 60, 2009, pp. 717–720.
https://doi.org/10.1016/j.scriptamat.2009.01.002
Hiroyuki Hirakata, Toshihiro Hirako, Yoshimasa Takahashi, Yasunori Matsuoka,
Takayuki Kitamura, Creep crack initiation at a free edge of an interface
between submicron thick elements, Engineering Fracture Mechanics, Vol.
75, 2008, pp. 2907–2920.
https://doi.org/10.1016/j.engfracmech.2008.01.007
Yoshimasa Takahashi, Hiroyuki Hirakata, Takayuki Kitamura, Quantitative
evaluation of plasticity of a ductile nano-component, Thin Solid Films,
Vol. 516, 2008, pp. 1925–1930.
https://doi.org/10.1016/j.tsf.2007.08.062
Yoshimasa Takahashi, Hiroyuki Hirakata, Takayuki Kitamura, Experimental
evaluation of plastic property of a low-dimensional Cu nano-component,
Materials Science Forum, Vols. 567-568, 2008, pp. 297–300.
https://doi.org/10.4028/www.scientific.net/MSF.567-568.297
Takayuki Kitamura, Hiroyuki Hirakata, Yoshimasa Takahashi, Interface Strength
of Low-dimensional Nano-Components, Key Engineering Materials, Vols. 353-358,
2007, pp. 1–8.
https://doi.org/10.4028/www.scientific.net/KEM.353-358.1
Hiroyuki Hirakata, Yoshimasa Takahashi, Takayuki Kitamura, Role of plasticity
on interface crack initiation from a free edge and propagation in a nano-component,
International Journal of Fracture, Vol. 145, 2007, pp. 261–271.
https://doi.org/10.1007/s10704-007-9079-0
Hiroyuki Hirakata, Yoshimasa Takahashi, Koji Shinmi, Do Van Truong, Takayuki
Kitamura, Development of in situ TEM experiment of crack initiation at
interface edge in nano-structures (in Japanese), Journal of the Society
of Materials Science, Japan, Vol. 55 (No. 12)，2006，pp. 1073–1080.
https://doi.org/10.2472/jsms.55.1073
Hiroyuki Hirakata, Yoshimasa Takahashi, Shohei Matsumoto, Takayuki Kitamura,
Dominant stress region for crack initiation at interface edge of microdot
on a substrate, Engineering Fracture Mechanics, Vol. 73, 2006, pp. 2698–2709.
https://doi.org/10.1016/j.engfracmech.2006.04.019
[Awards]
JSME outstanding paper award, 19/4/2013
JSMS academic encouragement award for young scientist, 25/5/2011
JSMS outstanding paper award, 19/5/2007
JSMS best presentation award at the 54th period annual academic congress,
27/5/2005
[Patents]
United States Patent No. 7579805
United States Patent No. 7075201
Japan Patent No. 4383278
Japan Patent No. 4161737
Japan Patent No. 4147987
Japan Patent No. 4023336
Japan Patent No. 4000976
