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Hiroyuki Kokawa

Hiroyuki Kokawa

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Materials Science 61 6675 6448 346 336 341 16983

Hiroyuki Kokawa publications per year

The chart shows the history of publications by Hiroyuki Kokawa between 1978 and 2024, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Hiroyuki Kokawa published across 47 years, from 1978 to 2024, averaging 7.5 papers a year. Output peaked at 23 publications in 2008. 8 of the 351 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1978 to 2024. Vertical axis: number of publications, 0 to 23. Peak 23 publications in 2008. 1978: 1 publication 1979: 0 publications 1980: 0 publications 1981: 1 publication 1982: 1 publication 1983: 3 publications 1984: 3 publications 1985: 2 publications 1986: 4 publications 1987: 5 publications 1988: 1 publication 1989: 3 publications 1990: 1 publication 1991: 6 publications 1992: 5 publications 1993: 3 publications 1994: 2 publications 1995: 4 publications 1996: 2 publications 1997: 2 publications 1998: 4 publications 1999: 9 publications 2000: 4 publications 2001: 13 publications 2002: 13 publications 2003: 16 publications 2004: 22 publications 2005: 20 publications 2006: 10 publications 2007: 15 publications 2008: 23 publications 2009: 17 publications 2010: 16 publications 2011: 18 publications 2012: 11 publications 2013: 16 publications 2014: 9 publications 2015: 9 publications 2016: 5 publications 2017: 10 publications 2018: 10 publications 2019: 8 publications 2020: 6 publications 2021: 3 publications 2022: 7 publications 2023: 6 publications 2024: 2 publications
1978 2024

351 publications in total across all disciplines

View publications per year as a table
Hiroyuki Kokawa: publications per year, 1978 to 2024
Year Publications
1978 1
1979 0
1980 0
1981 1
1982 1
1983 3
1984 3
1985 2
1986 4
1987 5
1988 1
1989 3
1990 1
1991 6
1992 5
1993 3
1994 2
1995 4
1996 2
1997 2
1998 4
1999 9
2000 4
2001 13
2002 13
2003 16
2004 22
2005 20
2006 10
2007 15
2008 23
2009 17
2010 16
2011 18
2012 11
2013 16
2014 9
2015 9
2016 5
2017 10
2018 10
2019 8
2020 6
2021 3
2022 7
2023 6
2024 2
Total 351
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Hiroyuki Kokawa 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 Hiroyuki Kokawa 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, 330–349 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: 341 publications — 68th percentile

68% 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
330–349 477 341
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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Hiroyuki Kokawa 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 Hiroyuki Kokawa 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: 61 D-Index — 48th percentile

48% 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 61
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

Hiroyuki Kokawa is affiliated with Tohoku University in Japan and specializes in the field of Engineering, with a focus on Mechanical Engineering. Their research encompasses a range of subfields, including Materials Chemistry, Aerospace Engineering, Mechanics of Materials, and Automotive Engineering.

The body of work by Hiroyuki Kokawa covers several main topics, notably:

  • Additive Manufacturing Materials and Processes
  • High Entropy Alloys Studies
  • Welding Techniques and Residual Stresses
  • Aluminum Alloys Composites Properties
  • Advanced Welding Techniques Analysis
  • High-Temperature Coating Behaviors
  • Additive Manufacturing and 3D Printing Technologies

Notable recent publications by Hiroyuki Kokawa include:

  • Cracking mechanism and mechanical properties of selective laser melted CoCrFeMnNi high entropy alloy using different scanning strategies (2020, Materials Science and Engineering A)
  • Additively manufactured high strength and ductility CrCoNi medium entropy alloy with hierarchical microstructure (2021, Materials Science and Engineering A)
  • Effects of rare earth elements on the microstructure and wear properties of TiB2 reinforced aluminum matrix composite coatings: Experiments and first principles calculations (2020, Applied Surface Science)
  • Grain Structure Evolution during Friction-Stir Welding (2020, Physical Mesomechanics)
  • Suppression of intergranular corrosion by surface grain boundary engineering of 304 austenitic stainless steel using laser peening plus annealing (2020, Materials Today Communications)

Hiroyuki Kokawa frequently publishes research in several scientific venues, with multiple contributions in:

  • Materials Science and Engineering A
  • SSRN Electronic Journal
  • Metals
  • Applied Surface Science
  • Physical Mesomechanics

Their collaborative work often involves coauthors such as Zhuguo Li, Kai Feng, Yutaka S. Sato, Jie Zhu, and Chengcheng Zhang, reflecting an active research network within their areas of study.

Best Publications

  • Microstructural evolution of 6063 aluminum during friction-stir welding

    Yutaka S. Sato;Hiroyuki Kokawa;Masatoshi Enomoto;Shigetoshi Jogan

  • Optimization of grain boundary character distribution for intergranular corrosion resistant 304 stainless steel by twin-induced grain boundary engineering

    M Shimada;H Kokawa;Z.J Wang;Y.S Sato

  • Parameters controlling microstructure and hardness during friction-stir welding of precipitation-hardenable aluminum alloy 6063

    Yutaka S. Sato;Mitsunori Urata;Hiroyuki Kokawa

  • Constitutional liquation during dissimilar friction stir welding of Al and Mg alloys

    Yutaka S. Sato;Seung Hwan C. Park;Masato Michiuchi;Hiroyuki Kokawa

  • Hall–Petch relationship in friction stir welds of equal channel angular-pressed aluminium alloys

    Yutaka S. Sato;Mitsunori Urata;Hiroyuki Kokawa;Keisuke Ikeda

  • Effect of micro-texture on fracture location in friction stir weld of Mg alloy AZ61 during tensile test

    Seung Hwan C. Park;Yutaka S. Sato;Hiroyuki Kokawa

  • Microstructural factors governing hardness in friction-stir welds of solid-solution-hardened Al alloys

    Yutaka S. Sato;Seung Hwan C. Park;Hiroyuki Kokawa

  • Distribution of tensile property and microstructure in friction stir weld of 6063 aluminum

    Yutaka S. Sato;Hiroyuki Kokawa

  • Microtexture in the friction-stir weld of an aluminum alloy

    Yutaka S. Sato;Hiroyuki Kokawa;Keiske Ikeda;Masatoshi Enomoto

  • TWIN-INDUCED GRAIN BOUNDARY ENGINEERING FOR 316 AUSTENITIC STAINLESS STEEL

    M. Michiuchi;H. Kokawa;Z.J. Wang;Y.S. Sato

  • Basal plane texture and flow pattern in friction stir weld of a magnesium alloy

    Seung Hwan C. Park;Yutaka S. Sato;Hiroyuki Kokawa

  • Rapid formation of the sigma phase in 304 stainless steel during friction stir welding

    Seung Hwan C. Park;Yutaka S. Sato;Hiroyuki Kokawa;Kazutaka Okamoto

  • Microstructural characteristics and mechanical properties of Ti-6Al-4V friction stir welds

    Yu Zhang;Yutaka S. Sato;Hiroyuki Kokawa;Seung Hwan C. Park

  • Sliding behaviour and dislocation structures in aluminium grain boundaries

    Hiroyuki Kokawa;Tadao Watanabe;Seiichi Karashima

  • Characteristics of the kissing-bond in friction stir welded Al alloy 1050

    Yutaka S. Sato;Hideaki Takauchi;Seung Hwan C. Park;Hiroyuki Kokawa

  • Precipitation sequence in friction stir weld of 6063 aluminum during aging

    Yutaka S. Sato;Hiroyuki Kokawa;Masatoshi Enomoto;Shigetoshi Jogan

  • Grain structure evolution during friction-stir welding of AZ31 magnesium alloy

    U.F.H.R. Suhuddin;S. Mironov;Y.S. Sato;H. Kokawa

  • Grain structure and texture evolution during friction stir welding of thin 6016 aluminum alloy sheets

    U.F.H.R. Suhuddin;S. Mironov;Y.S. Sato;H. Kokawa

  • Microstructure evolution during friction-stir welding of AZ31 magnesium alloy

    S. Mironov;T. Onuma;Y.S. Sato;H. Kokawa

  • Microstructural evolution during friction stir-processing of pure iron

    S. Mironov;Y.S. Sato;H. Kokawa

Frequent Co-Authors

Yutaka S. Sato
Yutaka S. Sato Tohoku University
Sergey Mironov
Sergey Mironov Belgorod National Research University
Ryutaro Maeda
Ryutaro Maeda National Institute of Advanced Industrial Science and Technology
Kai Feng
Kai Feng Shanghai Jiao Tong University
Kiyohito Ishida
Kiyohito Ishida Tohoku University
Zhuguo Li
Zhuguo Li Shanghai Jiao Tong University
Toshihiro Omori
Toshihiro Omori Tohoku University
Nobuhiro Tsuji
Nobuhiro Tsuji Kyoto University
Tadashi Furuhara
Tadashi Furuhara Tohoku University
Shuji Hanada
Shuji Hanada Tohoku University

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