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Shigeharu Ukai

Shigeharu Ukai

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Materials Science 60 7102 6865 387 374 311 12129

Shigeharu Ukai publications per year

The chart shows the history of publications by Shigeharu Ukai between 1980 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Shigeharu Ukai published across 47 years, from 1980 to 2026, averaging 7.1 papers a year. Output peaked at 22 publications in 2011. 9 of the 335 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1980 to 2026. Vertical axis: number of publications, 0 to 22. Peak 22 publications in 2011. 1980: 1 publication 1981: 0 publications 1982: 0 publications 1983: 0 publications 1984: 0 publications 1985: 1 publication 1986: 0 publications 1987: 1 publication 1988: 3 publications 1989: 3 publications 1990: 1 publication 1991: 0 publications 1992: 2 publications 1993: 6 publications 1994: 3 publications 1995: 0 publications 1996: 2 publications 1997: 4 publications 1998: 5 publications 1999: 7 publications 2000: 10 publications 2001: 3 publications 2002: 8 publications 2003: 5 publications 2004: 18 publications 2005: 15 publications 2006: 9 publications 2007: 12 publications 2008: 7 publications 2009: 12 publications 2010: 6 publications 2011: 22 publications 2012: 10 publications 2013: 21 publications 2014: 14 publications 2015: 7 publications 2016: 20 publications 2017: 15 publications 2018: 16 publications 2019: 19 publications 2020: 11 publications 2021: 12 publications 2022: 0 publications 2023: 5 publications 2024: 10 publications 2025: 8 publications 2026: 1 publication
1980 2026

335 publications in total across all disciplines

View publications per year as a table
Shigeharu Ukai: publications per year, 1980 to 2026
Year Publications
1980 1
1981 0
1982 0
1983 0
1984 0
1985 1
1986 0
1987 1
1988 3
1989 3
1990 1
1991 0
1992 2
1993 6
1994 3
1995 0
1996 2
1997 4
1998 5
1999 7
2000 10
2001 3
2002 8
2003 5
2004 18
2005 15
2006 9
2007 12
2008 7
2009 12
2010 6
2011 22
2012 10
2013 21
2014 14
2015 7
2016 20
2017 15
2018 16
2019 19
2020 11
2021 12
2022 0
2023 5
2024 10
2025 8
2026 1
Total 335
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Shigeharu Ukai publication distribution in Materials Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Materials Science in 2026. The highlighted bar marks where Shigeharu Ukai sits on this spectrum.

No. of scientists
200 400 600 800
Bar chart with 57 bars. Horizontal axis: publications, 50–69 to 1,163+. Vertical axis: number of scientists, 0 to 891. Most scientists, 891, have 190–209 publications. The last bar groups every scientist with 1,163 publications or more. The highlighted bar, 310–329 publications, is where this scientist sits. 50–69 publications: 28 scientists 70–89 publications: 152 scientists 90–109 publications: 356 scientists 110–129 publications: 487 scientists 130–149 publications: 723 scientists 150–169 publications: 835 scientists 170–189 publications: 850 scientists 190–209 publications: 891 scientists 210–229 publications: 862 scientists 230–249 publications: 766 scientists 250–269 publications: 726 scientists 270–289 publications: 665 scientists 290–309 publications: 593 scientists 310–329 publications: 537 scientists 330–349 publications: 477 scientists 350–369 publications: 440 scientists 370–389 publications: 356 scientists 390–409 publications: 321 scientists 410–429 publications: 256 scientists 430–449 publications: 246 scientists 450–469 publications: 216 scientists 470–489 publications: 212 scientists 490–509 publications: 174 scientists 510–529 publications: 194 scientists 530–549 publications: 162 scientists 550–569 publications: 131 scientists 570–589 publications: 111 scientists 590–609 publications: 103 scientists 610–629 publications: 99 scientists 630–649 publications: 77 scientists 650–669 publications: 92 scientists 670–689 publications: 56 scientists 690–709 publications: 53 scientists 710–729 publications: 53 scientists 730–749 publications: 38 scientists 750–769 publications: 52 scientists 770–789 publications: 43 scientists 790–809 publications: 38 scientists 810–829 publications: 34 scientists 830–849 publications: 25 scientists 850–869 publications: 18 scientists 870–889 publications: 20 scientists 890–909 publications: 24 scientists 910–929 publications: 27 scientists 930–949 publications: 20 scientists 950–969 publications: 17 scientists 970–989 publications: 10 scientists 990–1,009 publications: 16 scientists 1,010–1,029 publications: 13 scientists 1,030–1,049 publications: 12 scientists 1,050–1,069 publications: 9 scientists 1,070–1,089 publications: 8 scientists 1,090–1,109 publications: 7 scientists 1,110–1,129 publications: 9 scientists 1,130–1,149 publications: 2 scientists 1,150–1,162 publications: 5 scientists 1,163+ publications: 100 scientists
50–69 publications 1,163+

This scientist: 311 publications — 62nd percentile

62% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,163 publications or more.

View publications distribution as a table
Number of Materials Science scientists by publication count, Research.com 2026 ranking edition. Based on 12,847 ranked scientists.
Publications Scientists This scientist
50–69 28
70–89 152
90–109 356
110–129 487
130–149 723
150–169 835
170–189 850
190–209 891
210–229 862
230–249 766
250–269 726
270–289 665
290–309 593
310–329 537 311
330–349 477
350–369 440
370–389 356
390–409 321
410–429 256
430–449 246
450–469 216
470–489 212
490–509 174
510–529 194
530–549 162
550–569 131
570–589 111
590–609 103
610–629 99
630–649 77
650–669 92
670–689 56
690–709 53
710–729 53
730–749 38
750–769 52
770–789 43
790–809 38
810–829 34
830–849 25
850–869 18
870–889 20
890–909 24
910–929 27
930–949 20
950–969 17
970–989 10
990–1,009 16
1,010–1,029 13
1,030–1,049 12
1,050–1,069 9
1,070–1,089 8
1,090–1,109 7
1,110–1,129 9
1,130–1,149 2
1,150–1,162 5
1,163+ 100
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Shigeharu Ukai D-index placement in Materials Science in 2026

The chart shows the D-index (discipline H-index) distribution of Materials Science scientists ranked by Research.com in 2026. The highlighted bar marks where Shigeharu Ukai sits on this spectrum.

No. of scientists
200 400 600
Bar chart with 64 bars. Horizontal axis: D-Index, 40–41 to 165+. Vertical axis: number of scientists, 0 to 667. Most scientists, 667, have 52–53 D-Index. The last bar groups every scientist with 165 D-Index or more. The highlighted bar, 60–61 D-Index, is where this scientist sits. 40–41 D-Index: 211 scientists 42–43 D-Index: 450 scientists 44–45 D-Index: 612 scientists 46–47 D-Index: 612 scientists 48–49 D-Index: 598 scientists 50–51 D-Index: 657 scientists 52–53 D-Index: 667 scientists 54–55 D-Index: 621 scientists 56–57 D-Index: 597 scientists 58–59 D-Index: 610 scientists 60–61 D-Index: 587 scientists 62–63 D-Index: 606 scientists 64–65 D-Index: 533 scientists 66–67 D-Index: 490 scientists 68–69 D-Index: 469 scientists 70–71 D-Index: 378 scientists 72–73 D-Index: 421 scientists 74–75 D-Index: 359 scientists 76–77 D-Index: 323 scientists 78–79 D-Index: 299 scientists 80–81 D-Index: 230 scientists 82–83 D-Index: 210 scientists 84–85 D-Index: 195 scientists 86–87 D-Index: 203 scientists 88–89 D-Index: 175 scientists 90–91 D-Index: 175 scientists 92–93 D-Index: 142 scientists 94–95 D-Index: 121 scientists 96–97 D-Index: 117 scientists 98–99 D-Index: 107 scientists 100–101 D-Index: 88 scientists 102–103 D-Index: 85 scientists 104–105 D-Index: 68 scientists 106–107 D-Index: 62 scientists 108–109 D-Index: 57 scientists 110–111 D-Index: 45 scientists 112–113 D-Index: 49 scientists 114–115 D-Index: 50 scientists 116–117 D-Index: 34 scientists 118–119 D-Index: 38 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 29 scientists 124–125 D-Index: 28 scientists 126–127 D-Index: 24 scientists 128–129 D-Index: 33 scientists 130–131 D-Index: 28 scientists 132–133 D-Index: 21 scientists 134–135 D-Index: 20 scientists 136–137 D-Index: 23 scientists 138–139 D-Index: 17 scientists 140–141 D-Index: 12 scientists 142–143 D-Index: 17 scientists 144–145 D-Index: 21 scientists 146–147 D-Index: 13 scientists 148–149 D-Index: 11 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 13 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 4 scientists 162–163 D-Index: 4 scientists 164 D-Index: 3 scientists 165+ D-Index: 98 scientists
40–41 D-Index 165+

This scientist: 60 D-Index — 46th percentile

46% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 165 D-Index or more.

View D-Index distribution as a table
Number of Materials Science scientists by D-index, Research.com 2026 ranking edition. Based on 12,847 ranked scientists.
D-Index Scientists This scientist
40–41 211
42–43 450
44–45 612
46–47 612
48–49 598
50–51 657
52–53 667
54–55 621
56–57 597
58–59 610
60–61 587 60
62–63 606
64–65 533
66–67 490
68–69 469
70–71 378
72–73 421
74–75 359
76–77 323
78–79 299
80–81 230
82–83 210
84–85 195
86–87 203
88–89 175
90–91 175
92–93 142
94–95 121
96–97 117
98–99 107
100–101 88
102–103 85
104–105 68
106–107 62
108–109 57
110–111 45
112–113 49
114–115 50
116–117 34
118–119 38
120–121 37
122–123 29
124–125 28
126–127 24
128–129 33
130–131 28
132–133 21
134–135 20
136–137 23
138–139 17
140–141 12
142–143 17
144–145 21
146–147 13
148–149 11
150–151 14
152–153 13
154–155 9
156–157 10
158–159 7
160–161 4
162–163 4
164 3
165+ 98
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Overview

Shigeharu Ukai is affiliated with Hokkaido University in Japan. The scientist's research primarily centers around materials science and engineering, with a significant focus on nuclear materials and properties as well as fusion materials and technologies.

The scientific work spans main fields including:

  • Materials Science
  • Engineering

Subfields of study cover:

  • Materials Chemistry
  • Mechanical Engineering
  • Aerospace Engineering
  • Metals and Alloys
  • Computational Mechanics

The main research topics include:

  • Nuclear Materials and Properties
  • Fusion materials and technologies
  • High Temperature Alloys and Creep
  • High-Temperature Coating Behaviors
  • Hydrogen embrittlement and corrosion behaviors in metals
  • Nuclear reactor physics and engineering
  • Advanced materials and composites

Shigeharu Ukai has contributed to numerous publications in well-known academic venues, with frequent appearances in:

  • Journal of Nuclear Materials
  • SSRN Electronic Journal
  • Materials Science and Engineering A
  • Nuclear Materials and Energy
  • Corrosion Science

Recent papers authored or co-authored by Shigeharu Ukai include:

  • High-temperature creep deformation in FeCrAl-oxide dispersion strengthened alloy cladding, 2020, Materials Science and Engineering A
  • Alloy design and characterization of a recrystallized FeCrAl-ODS cladding for accident-tolerant BWR fuels: An overview of research activity in Japan, 2023, Journal of Nuclear Materials
  • Dislocation-climbing bypass over dispersoids with different lattice misfit in creep deformation of FeCrAl oxide dispersion-strengthened alloys, 2021, Journal of Materials Research and Technology

In addition, Ukai has collaborated with several frequent co-authors, including:

  • Naoko Oono
  • Ryuta Kasada
  • Hao Yu
  • Sosuke Kondo
  • Shinichiro Yamashita

Their scientific endeavors focus extensively on the design, characterization, and high-temperature performance of oxide dispersion-strengthened (ODS) alloys, particularly FeCrAl-based materials, which are relevant for accident-tolerant fuels in boiling water reactors (BWRs). Research includes studies on creep deformation mechanisms and development of protective alumina scales on ODS alloys.

Best Publications

  • Perspective of ODS alloys application in nuclear environments

    Shigeharu Ukai;Masayuki Fujiwara

  • Alloying design of oxide dispersion strengthened ferritic steel for long life FBRs core materials

    S. Ukai;M. Harada;H. Okada;M. Inoue

  • Development of Al added high-Cr ODS steels for fuel cladding of next generation nuclear systems

    A. Kimura;R. Kasada;N. Iwata;H. Kishimoto

  • Materials for future nuclear energy systems

    G.S. Was;D. Petti;S. Ukai;S. Zinkle

  • Development of Oxide Dispersion Strengthened Ferritic Steels for FBR Core Application, (I): Improvement of Mechanical Properties by Recrystallization Processing

    Shigeharu Ukai;Toshio Nishida;Hirokazu Okada;Takanari Okuda

  • Characterization of high temperature creep properties in recrystallized 12Cr-ODS ferritic steel claddings

    Shigeharu Ukai;Takanari Okuda;Masayuki Fujiwara;Toshimi Kobayashi

  • Development of 9Cr-ODS Martensitic Steel Claddings for Fuel Pins by means of Ferrite to Austenite Phase Transformation

    Shigeharu Ukai;Shunji Mizuta;Masayuki Fujiwara;Takanari Okuda

  • Development of Oxide Dispersion Strengthened Ferritic Steels for FBR Core Application, (I)

    Shigeharu Ukai;Toshio Nishida;Hirokazu Okada;Takanari Okuda

  • TEM and HRTEM study of oxide particles in an Al-alloyed high-Cr oxide dispersion strengthened steel with Zr addition

    Peng Dou;Akihiko Kimura;Ryuta Kasada;Takanari Okuda

  • Tube manufacturing and mechanical properties of oxide dispersion strengthened ferritic steel

    S. Ukai;M. Harada;H. Okada;M. Inoue

  • Tube manufacturing and characterization of oxide dispersion strengthened ferritic steels

    Shigeharu Ukai;Shunji Mizuta;Tunemitsu Yoshitake;Takanari Okuda

  • R&D of oxide dispersion strengthened ferritic martensitic steels for FBR

    S. Ukai;T. Nishida;T. Nishida;T. Okuda;T. Yoshitake

  • Corrosion properties of oxide dispersion strengthened steels in super-critical water environment

    H.S Cho;A Kimura;S Ukai;M Fujiwara

  • Formation of nanoscale complex oxide particles in mechanically alloyed ferritic steel

    S. Yamashita;S. Ohtsuka;N. Akasaka;S. Ukai

  • Improvement of 9Cr-ODS martensitic steel properties by controlling excess oxygen and titanium contents

    S Ohtsuka;S Ukai;M Fujiwara;T Kaito

  • High-temperature strength characterization of advanced 9Cr-ODS ferritic steels

    S. Ukai;S. Ukai;S. Ohtsuka;T. Kaito;H. Sakasegawa

  • High Burnup Fuel Cladding Materials R&D for Advanced Nuclear Systems: Nano-sized oxide dispersion strengthening steels

    Akihiko Kimura;Han Sik Cho;Naoki Toda;Ryuta Kasada

  • Y2O3 evolution and dispersion refinement in Co-base ODS alloys

    Lin Zhang;Shigeharu Ukai;Takeshi Hoshino;Shigenari Hayashi

  • Polymorphic and coherency transition of Y-Al complex oxide particles with extrusion temperature in an Al-alloyed high-Cr oxide dispersion strengthened ferritic steel

    P. Dou;A. Kimura;T. Okuda;M. Inoue

  • Production and Properties of Nano-scale Oxide Dispersion Strengthened (ODS) 9Cr Martensitic Steel Claddings

    Shigeharu Ukai;Takeji Kaito;Satoshi Ohtsuka;Tsuyoshi Narita

Frequent Co-Authors

Akihiko Kimura
Akihiko Kimura Kyoto University
Fujio Abe
Fujio Abe National Institute for Materials Science
Akira Kohyama
Akira Kohyama Muroran Institute of Technology
Todd R. Allen
Todd R. Allen University of Michigan–Ann Arbor
Lin Shao
Lin Shao Texas A&M University
Gary S. Was
Gary S. Was University of Michigan–Ann Arbor
Kumar Sridharan
Kumar Sridharan University of Wisconsin–Madison
Suntharampillai Thevuthasan
Suntharampillai Thevuthasan Pacific Northwest National Laboratory
Stuart A. Maloy
Stuart A. Maloy Pacific Northwest National Laboratory
Steven J. Zinkle
Steven J. Zinkle University of Tennessee at Knoxville

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