• 505 Citations
  • 13 h-Index
20082020

Research output per year

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Research Output

  • 505 Citations
  • 13 h-Index
  • 38 Article
  • 13 Conference contribution
  • 4 Conference article
2020
1 Citation (Scopus)

Defect tolerance and hydrogen susceptibility of the fatigue limit of an additively manufactured Ni-based superalloy 718

Kevinsanny, Okazaki, S., Takakuwa, O., Ogawa, Y., Funakoshi, Y., Kawashima, H., Matsuoka, S. & Matsunaga, H., Oct 2020, In : International Journal of Fatigue. 139, 105740.

Research output: Contribution to journalArticle

2019

Change of crack initiation and propagation modes in hydrogenrelated failure of a precipitation-strengthened NI-based superalloy 718 under internal and external hydrogen conditions

Ogawa, Y., Takakuwa, O., Okazaki, S., Matsuoka, S. & Matsunaga, H., Jan 1 2019, Materials and Fabrication. American Society of Mechanical Engineers (ASME), (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; vol. 6B-2019).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Effect of defects and hydrogen on the fatigue limit of Ni-based superalloy 718

Kevinsanny, Okazaki, S., Takakuwa, O., Ogawa, Y., Okita, K., Funakoshi, Y., Yamabe, J., Matsuoka, S. & Matsunaga, H., Jan 1 2019, In : Procedia Structural Integrity. 19, p. 312-319 8 p.

Research output: Contribution to journalConference article

Open Access
1 Citation (Scopus)

Effect of defects on the fatigue limit of Ni-based superalloy 718 with different grain sizes

Kevinsanny, Okazaki, S., Takakuwa, O., Ogawa, Y., Okita, K., Funakoshi, Y., Yamabe, J., Matsuoka, S. & Matsunaga, H., May 1 2019, In : Fatigue and Fracture of Engineering Materials and Structures. 42, 5, p. 1203-1213 11 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)

Fracture and deformation behavior in slow-strain-rate tensile testing of Cu-Ni alloy with internal hydrogen

Wada, K., Yamabe, J., Ogawa, Y., Takakuwa, O., Iijima, T. & Matsunaga, H., Jan 1 2019, Materials and Fabrication. American Society of Mechanical Engineers (ASME), (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; vol. 6B-2019).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Hydrogen-assisted crack propagation in α-iron during elasto-plastic fracture toughness tests

Birenis, D., Ogawa, Y., Matsunaga, H., Takakuwa, O., Yamabe, J., Prytz, Ø. & Thøgersen, A., May 22 2019, In : Materials Science and Engineering A. 756, p. 396-404 9 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Hydrogen-induced ductility loss of precipitation-strengthened Fe-Ni-Cr-based superalloy

Takakuwa, O., Ogawa, Y., Yamabe, J. & Matsunaga, H., Jan 2 2019, In : Materials Science and Engineering A. 739, p. 335-342 8 p.

Research output: Contribution to journalArticle

11 Citations (Scopus)
6 Citations (Scopus)

Role of hydrogen-charging on nucleation and growth of ductile damage in austenitic stainless steels

Maire, E., Grabon, S., Adrien, J., Lorenzino, P., Asanuma, Y., Takakuwa, O. & Matsunaga, H., 2019, In : Materials. 12, 9, 1426.

Research output: Contribution to journalArticle

Open Access
1 Citation (Scopus)
2 Citations (Scopus)

Temperature dependence of fatigue crack growth in low-carbon steel under gaseous hydrogen

Takakuwa, O., Ogawa, Y., Okazaki, S., Matsunaga, H. & Matsuoka, S., Jan 1 2019, Materials and Fabrication. American Society of Mechanical Engineers (ASME), (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; vol. 6B-2019).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2018
Open Access

Hydrogen-assisted fatigue crack propagation in a commercially pure BCC iron

Birenis, D., Ogawa, Y., Matsunaga, H., Takakuwa, O., Prytz, Ø., Yamabe, J. & Thøgersen, A., Jan 1 2018, Materials and Fabrication. American Society of Mechanical Engineers (ASME), (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; vol. 6B-2018).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Hydrogen-assisted fatigue crack propagation in a pure BCC iron. Part I: Intergranular crack propagation at relatively low stress intensities

Ogawa, Y., Birenis, D., Matsunaga, H., Takakuwa, O., Yamabe, J., Prytz, Ø. & Thøgersen, A., May 25 2018, In : MATEC Web of Conferences. 165, 03011.

Research output: Contribution to journalConference article

5 Citations (Scopus)
5 Citations (Scopus)

Interpretation of hydrogen-assisted fatigue crack propagation in BCC iron based on dislocation structure evolution around the crack wake

Birenis, D., Ogawa, Y., Matsunaga, H., Takakuwa, O., Yamabe, J., Prytz, Ø. & Thøgersen, A., Sep 1 2018, In : Acta Materialia. 156, p. 245-253 9 p.

Research output: Contribution to journalArticle

28 Citations (Scopus)

Peculiar temperature dependence of hydrogen-enhanced fatigue crack growth of low-carbon steel in gaseous hydrogen

Matsuoka, S., Takakuwa, O., Okazaki, S., Yoshikawa, M., Yamabe, J. & Matsunaga, H., Sep 2018, In : Scripta Materialia. 154, p. 101-105 5 p.

Research output: Contribution to journalArticle

9 Citations (Scopus)

Temperature dependence of fatigue crack growth in low-alloy steel under gaseous hydrogen

Takakuwa, O., Yoshikawa, M., Matsuoka, S., Yamabe, J., Okazaki, S. & Matsunaga, H., Jan 1 2018, Materials and Fabrication. American Society of Mechanical Engineers (ASME), (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; vol. 6B-2018).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

The role of intergranular fracture on hydrogen-assisted fatigue crack propagation in pure iron at a low stress intensity range

Ogawa, Y., Birenis, D., Matsunaga, H., Takakuwa, O., Yamabe, J., Prytz, Ø. & Thøgersen, A., Aug 22 2018, In : Materials Science and Engineering A. 733, p. 316-328 13 p.

Research output: Contribution to journalArticle

21 Citations (Scopus)
19 Citations (Scopus)
2017
21 Citations (Scopus)

Hydrogen-assisted degradation of high-strength stainless steel with a newly developed aluminum-based coating in high-pressure hydrogen gas environment

Yamabe, J., Takakuwa, O., Awane, T. & Matsuoka, S., Jan 1 2017, Materials and Fabrication. American Society of Mechanical Engineers (ASME), (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; vol. 6B-2017).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Hydrogen diffusivity and tensile-ductility loss of solution-treated austenitic stainless steels with external and internal hydrogen

Yamabe, J., Takakuwa, O., Matsunaga, H., Itoga, H. & Matsuoka, S., May 4 2017, In : International Journal of Hydrogen Energy. 42, 18, p. 13289-13299 11 p.

Research output: Contribution to journalArticle

49 Citations (Scopus)
17 Citations (Scopus)

Multi-scale observation of hydrogen-induced, localized plastic deformation in fatigue-crack propagation in a pure iron

Ogawa, Y., Birenis, D., Matsunaga, H., Thøgersen, A., Prytz, Ø., Takakuwa, O. & Yamabe, J., Nov 2017, In : Scripta Materialia. 140, p. 13-17 5 p.

Research output: Contribution to journalArticle

38 Citations (Scopus)

Recent progress on interpretation of tensile ductility loss for various austenitic stainless steels with external and internal hydrogen

Takakuwa, O., Yamabe, J., Matsunaga, H., Furuya, Y. & Matsuoka, S., Jan 1 2017, Materials and Fabrication. American Society of Mechanical Engineers (ASME), (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; vol. 6B-2017).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)
2016

Enhancing the durability of spinal implant fixture applications made of Ti-6Al-4V ELI by means of cavitation peening

Takakuwa, O., Nakai, M., Narita, K., Niinomi, M., Hasegawa, K. & Soyama, H., Nov 1 2016, In : International Journal of Fatigue. 92, p. 360-367 8 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)

Experimental verification of the hydrogen concentration around a crack tip using spot X-ray diffraction

Takakuwa, O., Fujisawa, T. & Soyama, H., Dec 28 2016, In : International Journal of Hydrogen Energy. 41, 48, p. 23188-23195 8 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Preventing hydrogen diffusion in stainless steel by cavitating jet in air

Takakuwa, O. & Soyama, H., Jan 1 2016, 23rd International Conference on Water Jetting 2016. BHR Group Limited, p. 215-221 7 p. (23rd International Conference on Water Jetting 2016).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Using cavitation peening to enhance the fatigue strength of duralumin plate containing a hole with rounded edges

Takakuwa, O., Takeo, F., Sato, M. & Soyama, H., Dec 15 2016, In : Surface and Coatings Technology. 307, p. 200-205 6 p.

Research output: Contribution to journalArticle

7 Citations (Scopus)
2014

Effect of hydrogen on the micro- and macro-strain near the surface of austenitic stainless steel

Takakuwa, O., Mano, Y. & Soyama, H., Jan 1 2014, Materials Science and Engineering Technology. Trans Tech Publications Ltd, p. 1298-1302 5 p. (Advanced Materials Research; vol. 936).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Effect of indentation load on vickers hardness of austenitic stainless steel after hydrogen charging

Takakuwa, O., Mano, Y. & Soyama, H., Jan 1 2014, Materials and Fabrication. American Society of Mechanical Engineers (ASME), Vol. 6B.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Effect of load current density during the production of Cu2O/Cu solar cells by anodic oxidation on film quality and output power

Hasuda, K., Takakuwa, O. & Soyama, H., Jan 1 2014, In : Solid-State Electronics. 91, p. 130-136 7 p.

Research output: Contribution to journalArticle

Effect of nozzle geometry on aggressivity of cavitating jet for cavitation erosion test and applications

Nishimura, S., Takakuwa, O. & Soyama, H., Jan 1 2014, In : Fluid Mechanics and its Applications. 106, p. 283-302 20 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Increase in the local yield stress near surface of austenitic stainless steel due to invasion by hydrogen

Takakuwa, O., Mano, Y. & Soyama, H., Apr 4 2014, In : International Journal of Hydrogen Energy. 39, 11, p. 6095-6103 9 p.

Research output: Contribution to journalArticle

21 Citations (Scopus)
2013

Improvement of mechanical properties of dental materials by shot peening

Aoyagi, Y., Kawaragi, Y., Tokue, A., Ohkubo, C., Takakuwa, O. & Soyama, H., Aug 19 2013, In : Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A. 79, 803, p. 1019-1029 11 p.

Research output: Contribution to journalArticle

2012

Development of peening technique using recirculating shot accelerated by water jet

Naito, A., Takakuwa, O. & Soyama, H., Jan 16 2012, In : Materials Science and Technology. 28, 2, p. 234-239 6 p.

Research output: Contribution to journalArticle

18 Citations (Scopus)

Effect of nozzle shape for high injection pressure on aggressivity of cavitating jet

Soyama, H., Takakuwa, O. & Naito, A., 2012, BHR Group - 21st International Conference on Water Jetting: Looking to the Future, Learning from the Past. p. 367-378 12 p. (BHR Group - 21st International Conference on Water Jetting: Looking to the Future, Learning from the Past).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Effect of the impact energy of various peening techniques on the induced plastic deformation region

Kanou, S., Takakuwa, O., Mannava, S. R., Qian, D., Vasudevan, V. K. & Soyama, H., Oct 1 2012, In : Journal of Materials Processing Technology. 212, 10, p. 1998-2006 9 p.

Research output: Contribution to journalArticle

14 Citations (Scopus)

Estimation of the depth of surface modification layer induced by cavitation peening

Takakuwa, O., Nishikawa, M. & Soyama, H., Aug 1 2012, In : Journal of Materials Processing Technology. 212, 8, p. 1716-1722 7 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)

Numerical simulation of the effects of residual stress on the concentration of hydrogen around a crack tip

Takakuwa, O., Nishikawa, M. & Soyama, H., Feb 15 2012, In : Surface and Coatings Technology. 206, 11-12, p. 2892-2898 7 p.

Research output: Contribution to journalArticle

36 Citations (Scopus)

Suppression of hydrogen-assisted fatigue crack growth in austenitic stainless steel by cavitation peening

Takakuwa, O. & Soyama, H., Mar 1 2012, In : International Journal of Hydrogen Energy. 37, 6, p. 5268-5276 9 p.

Research output: Contribution to journalArticle

44 Citations (Scopus)

Technique for partially strengthening electrical steel sheet of IPM motor using cavitation peening

Takakuwa, O., Nishikawa, M. & Soyama, H., Dec 1 2012, In : Energy Materials: Materials Science and Engineering for Energy Systems. 6, 1, p. 1422-1426 5 p.

Research output: Contribution to journalArticle

The effect of scanning pitch of nozzle for a cavitating jet during overlapping peening treatment

Takakuwa, O. & Soyama, H., Jul 15 2012, In : Surface and Coatings Technology. 206, 23, p. 4756-4762 7 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)
13 Citations (Scopus)
2011

Introduction of compressive residual stress into stainless steel by employing a cavitating jet in air

Soyama, H., Kikuchi, T., Nishikawa, M. & Takakuwa, O., Feb 15 2011, In : Surface and Coatings Technology. 205, 10, p. 3167-3174 8 p.

Research output: Contribution to journalArticle

48 Citations (Scopus)