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Development of In situ characterization methods for dislocation motion at a crack tip: overcoming metal fatigue

Research Project

Project/Area Number 20H02457
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 26040:Structural materials and functional materials-related
Research InstitutionTohoku University

Principal Investigator

Koyama Motomichi  東北大学, 金属材料研究所, 准教授 (20722705)

Co-Investigator(Kenkyū-buntansha) 佐々木 大輔  久留米工業高等専門学校, 材料システム工学科, 助教 (50772498)
奥山 彫夢  木更津工業高等専門学校, 電子制御工学科, 准教授 (50804655)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2022: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2020: ¥10,010,000 (Direct Cost: ¥7,700,000、Indirect Cost: ¥2,310,000)
Keywords金属疲労 / 水素脆化 / そのば観察 / 電子チャネリングコントラスト / き裂 / その場観察 / 結晶塑性有限要素法 / 元素移流拡散解析
Outline of Research at the Start

微小疲労き裂進展を理解するため、三つの課題を解決する。①き裂先端からの転位射出とその後の転位組織形成のその場観察、②き裂面形成に要求される空孔の密度分布の定量化、③き裂先端近傍の転位易動度に影響する侵入型固溶元素の拡散挙動解析、の三つである。まず①について、“電子チャネリングコントラスト法による転位運動その場観察”の手法を適用する。この観察事実を参考に、“結晶塑性有限要素法による空孔密度分布計算”の手法を確立する。そして、“固溶元素拡散解析を有限要素法による弾塑性解析と連成”させるで、固溶元素分布、転位運動距離ならびに転位運動の不均一性の見積もりを行い、その場観察結果をより定量的に解釈する。

Outline of Final Research Achievements

In this study, we have worked for technical developments of in situ microscopic observations and finite element analysis (FEA) with target materials of steels, Ni alloy, and Ti alloy. Specifically, the following four achievements were obtained: (1) technical developments of in situ electron channeling contrast imaging (ECCI), (2) Methodological establishment of vacancy concentration distribution at a sharp notch tip using crystal plasticity FEA, (3) simulation of plasticity localization based on a hardening model using FEA coupled with an element diffusion analysis, (4)Clarification of microstructure dependence of small fatigue crack growth in a lath martensitic steel using ECCI coupled with in situ secondary electron imaging.

Academic Significance and Societal Importance of the Research Achievements

本研究の大きな成果は金属疲労に繋がる現象の観察および計算解析の技術構築である。金属疲労は試験片形状依存性が大きく、特にき裂進展についてはバルク試料での解析が要求される。この観点から、その場ECCI法の構築はバルク試料での観察を実現しており、疲労現象にとらわれないバルク試料に対する広範な応用が期待される。また、金属疲労では応力、水素、空孔といったそれらの分布を可視化することが極めて困難である因子が試料内部で発達し、疲労損傷発達に影響する。実験的には得ることが非常に困難なこれら因子に関連するパラメーターを有限要素法の応用で実現したことも、金属疲労研究全般で利用が検討される成果であると考える。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (38 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (2 results) Journal Article (32 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 30 results,  Open Access: 21 results) Presentation (4 results) (of which Int'l Joint Research: 3 results,  Invited: 4 results)

  • [Int'l Joint Research] State University of Ponta Grossa(ブラジル)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Max-Planck-Institut fuer Eisenforschung(ドイツ)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Cr Effects on the Local Plasticity Evolution and Fracture Behaviors of Ni–Cr Alloys Tensile-Tested under Hydrogen Charging2023

    • Author(s)
      Kobayashi Naohiro、Koyama Motomichi、Yamamura Misaho、Hojo Tomohiko、Akiyama Eiji
    • Journal Title

      MATERIALS TRANSACTIONS

      Volume: 64 Issue: 1 Pages: 212-219

    • DOI

      10.2320/matertrans.MT-M2022140

    • ISSN
      1345-9678, 1347-5320
    • Year and Date
      2023-01-01
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Mechanical loading effect on the hydrogen uptake of tempered martensite steel: Elastic strain effect vs. plastic strain effect2023

    • Author(s)
      Masuda Yota、Koyama Motomichi、Kakinuma Hiroshi、Akiyama Eiji
    • Journal Title

      Materials Science and Engineering: A

      Volume: 862 Pages: 144486-144486

    • DOI

      10.1016/j.msea.2022.144486

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Quantitative Evaluation of the Relationship between Strain and Color Change in Opal Photonic Crystal Films and Application into Complex Specimen Geometries2022

    • Author(s)
      Zhou Yutao、Yang Zhipeng、Koyama Motomichi、Ajito Saya、Hojo Tomohiko、Fudouzi Hiroshi、Akiyama Eiji
    • Journal Title

      ISIJ International

      Volume: 62 Issue: 10 Pages: 2061-2068

    • DOI

      10.2355/isijinternational.ISIJINT-2022-054

    • ISSN
      0915-1559, 1347-5460
    • Year and Date
      2022-10-15
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Hierarchical Deformation Heterogeneity during Lüders Band Propagation in an Fe-5Mn-0.1C Medium Mn Steel Clarified through <i>in situ</i> Scanning Electron Microscopy2022

    • Author(s)
      Koyama Motomichi、Yamashita Takayuki、Morooka Satoshi、Yang Zhipeng、Varanasi Rama Srinivas、Hojo Tomohiko、Kawasaki Takuro、Harjo Stefanus
    • Journal Title

      ISIJ International

      Volume: 62 Issue: 10 Pages: 2043-2053

    • DOI

      10.2355/isijinternational.ISIJINT-2022-098

    • ISSN
      0915-1559, 1347-5460
    • Year and Date
      2022-10-15
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Microstructure and Plasticity Evolution During Lüders Deformation in an Fe-5Mn-0.1C Medium-Mn Steel2022

    • Author(s)
      Koyama Motomichi、Yamashita Takayuki、Morooka Satoshi、Sawaguchi Takahiro、Yang Zhipeng、Hojo Tomohiko、Kawasaki Takuro、Harjo Stefanus
    • Journal Title

      ISIJ International

      Volume: 62 Issue: 10 Pages: 2036-2042

    • DOI

      10.2355/isijinternational.ISIJINT-2021-510

    • NAID

      130008154264

    • ISSN
      0915-1559, 1347-5460
    • Year and Date
      2022-10-15
    • Related Report
      2022 Annual Research Report
  • [Journal Article] Crack Tip Deformation during Dwell Fatigue and Its Correlation with Crack/Fracture Surface Morphologies in a Bi-Modal Ti–6Al–4V Alloy2022

    • Author(s)
      Aoki Yuma、Koyama Motomichi、Tanaka Masaki、Tsuzaki Kaneaki
    • Journal Title

      MATERIALS TRANSACTIONS

      Volume: 63 Issue: 9 Pages: 1232-1241

    • DOI

      10.2320/matertrans.MT-M2022076

    • ISSN
      1345-9678, 1347-5320
    • Year and Date
      2022-09-01
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Annealing Time Effects on Mechanically Long Fatigue Crack Growth of TRIP-maraging Steels2022

    • Author(s)
      Mizoguchi Tomoki、Koyama Motomichi、Noguchi Hiroshi
    • Journal Title

      ISIJ International

      Volume: 62 Issue: 2 Pages: 399-401

    • DOI

      10.2355/isijinternational.ISIJINT-2021-093

    • NAID

      130008160464

    • ISSN
      0915-1559, 1347-5460
    • Year and Date
      2022-02-15
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Hydrogen Embrittlement Behavior of Pure Ni and Ni–20Cr Alloy with Different Grain Sizes2022

    • Author(s)
      Kobayashi Naohiro、Koyama Motomichi、Kobayashi Kenji、Hojo Tomohiko、Akiyama Eiji
    • Journal Title

      MATERIALS TRANSACTIONS

      Volume: 63 Issue: 2 Pages: 247-256

    • DOI

      10.2320/matertrans.MT-M2021170

    • NAID

      130008144074

    • ISSN
      1345-9678, 1347-5320
    • Year and Date
      2022-02-01
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Multi-Probe Characterization of Plasticity Heterogeneity: Requirement of Alloy Design Considering Dislocation Planarity for Developing Crack-Resistant Ni–Cr Alloys2022

    • Author(s)
      Kong Taein、Koyama Motomichi、Yamamura Misaho、Akiyama Eiji
    • Journal Title

      MATERIALS TRANSACTIONS

      Volume: 63 Issue: 1 Pages: 88-91

    • DOI

      10.2320/matertrans.MT-M2021191

    • NAID

      130008134287

    • ISSN
      1345-9678, 1347-5320
    • Year and Date
      2022-01-01
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Hydrogen-accelerated fatigue crack growth of equiatomic Fe-Cr-Ni-Mn-Co high-entropy alloy evaluated by compact tension testing2022

    • Author(s)
      Koyama Motomichi、Mizumachi Shunsuke、Akiyama Eiji、Tsuzaki Kaneaki
    • Journal Title

      Materials Science and Engineering: A

      Volume: 848 Pages: 143394-143394

    • DOI

      10.1016/j.msea.2022.143394

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Strain Rate and Temperature Effects on Hydrogen Embrittlement of Stable and Metastable High-Entropy Alloys2022

    • Author(s)
      Koyama M.、Ichii K.、Tsuzaki K.
    • Journal Title

      Physical Mesomechanics

      Volume: 25 Issue: 5 Pages: 385-392

    • DOI

      10.1134/s1029959922050010

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Factors Distinguishing Hydrogen-Assisted Intergranular and Intergranular-Like Fractures in a Tempered Lath Martensitic Steel2022

    • Author(s)
      Chen Tingshu、Chiba Takahiro、Koyama Motomichi、Akiyama Eiji、Takai Kenichi
    • Journal Title

      Metallurgical and Materials Transactions A

      Volume: 53 Issue: 5 Pages: 1645-1658

    • DOI

      10.1007/s11661-022-06608-2

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Pre-straining alters hydrogen-assisted cracking site and local hydrogen diffusivity in a nitrogen-doped duplex steel2022

    • Author(s)
      Maeda Milene Yumi、Koyama Motomichi、Nishimura Hayato、Cintho Osvaldo Mitsuyuki、Akiyama Eiji
    • Journal Title

      Scripta Materialia

      Volume: 207 Pages: 114272-114272

    • DOI

      10.1016/j.scriptamat.2021.114272

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Roles of Hydrogen Content and Pre-strain on Damage Evolution of TRIP-aided Bainitic Ferrite Steel2021

    • Author(s)
      Verma Virendra Kumar、Koyama Motomichi、Kumai Bakuya、Hojo Tomohiko、Akiyama Eiji
    • Journal Title

      ISIJ International

      Volume: 61 Issue: 4 Pages: 1309-1314

    • DOI

      10.2355/isijinternational.ISIJINT-2020-514

    • NAID

      130008024874

    • ISSN
      0915-1559, 1347-5460
    • Year and Date
      2021-04-15
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Fatigue Crack Growth at Different Frequencies and Temperatures in an Fe-based Metastable High-entropy Alloy2021

    • Author(s)
      Koyama Motomichi、Eguchi Takeshi、Tsuzaki Kaneaki
    • Journal Title

      ISIJ International

      Volume: 61 Issue: 2 Pages: 641-647

    • DOI

      10.2355/isijinternational.ISIJINT-2020-504

    • NAID

      130007987401

    • ISSN
      0915-1559, 1347-5460
    • Year and Date
      2021-02-15
    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Depressurization-induced diffusionless transformation in pure iron hydrogenated under several gigapascals2021

    • Author(s)
      M. Koyama, H. Saitoh, T. Sato, S. Orimo, E. Akiyama
    • Journal Title

      Materials Letters: X

      Volume: 11 Pages: 100078-100078

    • DOI

      10.1016/j.mlblux.2021.100078

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Microstructure Refinement by Low-Temperature Ausforming in an Fe-Based Metastable High-Entropy Alloy2021

    • Author(s)
      Koyama Motomichi、Gondo Takeaki、Tsuzaki Kaneaki
    • Journal Title

      Metals

      Volume: 11 Issue: 5 Pages: 742-742

    • DOI

      10.3390/met11050742

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Strain rate sensitivity of hydrogen-assisted ε-martensitic transformation and associated hydrogen embrittlement in high-Mn steel2021

    • Author(s)
      Hao Chunxi、Koyama Motomichi、Ajito Saya、Akiyama Eiji
    • Journal Title

      International Journal of Hydrogen Energy

      Volume: 46 Issue: 53 Pages: 27221-27233

    • DOI

      10.1016/j.ijhydene.2021.05.162

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Hydrogen embrittlement and associated surface crack growth in fine-grained equiatomic CoCrFeMnNi high-entropy alloys with different annealing temperatures evaluated by tensile testing under in situ hydrogen charging2021

    • Author(s)
      Wang Haoyu、Koyama Motomichi、Hojo Tomohiko、Akiyama Eiji
    • Journal Title

      International Journal of Hydrogen Energy

      Volume: 46 Issue: 65 Pages: 33028-33038

    • DOI

      10.1016/j.ijhydene.2021.07.136

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Hierarchical Characteristics of Hydrogen-Assisted Crack Growth and Microstructural Strain Evolution in Tempered Martensitic Steels: Case of Quasi-cleavage Fracture2021

    • Author(s)
      Chen Tingshu、Chiba Takahiro、Koyama Motomichi、Shibata Akinobu、Akiyama Eiji、Takai Kenichi
    • Journal Title

      Metallurgical and Materials Transactions A

      Volume: 52 Issue: 10 Pages: 4703-4713

    • DOI

      10.1007/s11661-021-06423-1

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Hydrogenation treatment under several gigapascals assists diffusionless transformation in a face-centered cubic steel2021

    • Author(s)
      M. Koyama, H. Saitoh, T. Sato, S. Orimo, E. Akiyama
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1

    • DOI

      10.1038/s41598-021-98938-1

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Quantification and Characterization of Microdamage Resistance in Metals for Designing High-Strength Ductile Microstructures2021

    • Author(s)
      Koyama Motomichi
    • Journal Title

      Accounts of Materials Research

      Volume: 2 Issue: 12 Pages: 1167-1176

    • DOI

      10.1021/accountsmr.1c00160

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Annealing Time Effects on Mechanically Long Fatigue Crack Growth of TRIP-maraging Steels2021

    • Author(s)
      Mizoguchi Tomoki、Koyama Motomichi、Noguchi Hiroshi
    • Journal Title

      Tetsu-to-Hagane

      Volume: 107 Issue: 4 Pages: 321-324

    • DOI

      10.2355/tetsutohagane.TETSU-2020-106

    • NAID

      130008009172

    • ISSN
      0021-1575, 1883-2954
    • Related Report
      2021 Annual Research Report
  • [Journal Article] Hydrogen-assisted damage evolution in nitrogen-doped duplex stainless steel2021

    • Author(s)
      Maeda Milene Yumi、Koyama Motomichi、Nishimura Hayato、Cintho Osvaldo Mitsuyuki、Akiyama Eiji
    • Journal Title

      International Journal of Hydrogen Energy

      Volume: 46 Issue: 2 Pages: 2716-2728

    • DOI

      10.1016/j.ijhydene.2020.10.152

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Stacking fault aggregation during cooling composing FCC-HCP martensitic transformation revealed by in-situ electron channeling contrast imaging in an Fe-high Mn alloy2021

    • Author(s)
      Koyama Motomichi、Seo Misaki、Nakafuji Keiichiro、Tsuzaki Kaneaki
    • Journal Title

      Science and Technology of Advanced Materials

      Volume: 22 Issue: 1 Pages: 135-140

    • DOI

      10.1080/14686996.2021.1877570

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Availability of Opal Photonic Crystal Films for Visualizing Heterogeneous Strain Evolution in Steels: Example of Lüders Deformation2020

    • Author(s)
      Yang Zhipeng、Koyama Motomichi、Fudouzi Hiroshi、Hojo Tomohiko、Akiyama Eiji
    • Journal Title

      ISIJ International

      Volume: 60 Issue: 11 Pages: 2604-2608

    • DOI

      10.2355/isijinternational.ISIJINT-2020-223

    • NAID

      130007940337

    • ISSN
      0915-1559, 1347-5460
    • Year and Date
      2020-11-15
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Origin of micrometer-scale dislocation motion during hydrogen desorption2020

    • Author(s)
      Koyama Motomichi、Taheri-Mousavi Seyedeh Mohadeseh、Yan Haoxue、Kim Jinwoo、Cameron Benjamin Clive、Moeini-Ardakani Seyed Sina、Li Ju、Tasan Cemal Cem
    • Journal Title

      Science Advances

      Volume: 6 Issue: 23

    • DOI

      10.1126/sciadv.aaz1187

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Hydrogen Enhances Shape Memory Effect of a Ferrous Face-Centered Cubic Alloy2020

    • Author(s)
      Koyama Motomichi、Hao Chunxi、Akiyama Eiji、Tsuzaki Kaneaki
    • Journal Title

      Metallurgical and Materials Transactions A

      Volume: 51 Issue: 9 Pages: 4439-4441

    • DOI

      10.1007/s11661-020-05886-y

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of hydrogen content that alters damage evolution mechanisms in SUH 660 precipitation-strengthened Fe-Cr-Ni steel2020

    • Author(s)
      Verma Virendra Kumar、Koyama Motomichi、Hamada Shigeru、Akiyama Eiji
    • Journal Title

      Materials Science and Engineering: A

      Volume: 791 Pages: 139750-139750

    • DOI

      10.1016/j.msea.2020.139750

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effects of Mn Content and Grain Size on Hydrogen Embrittlement Susceptibility of Face-Centered Cubic High-Entropy Alloys2020

    • Author(s)
      Koyama Motomichi、Wang Haoyu、Verma Virendra Kumar、Tsuzaki Kaneaki、Akiyama Eiji
    • Journal Title

      Metallurgical and Materials Transactions A

      Volume: 51 Issue: 11 Pages: 5612-5616

    • DOI

      10.1007/s11661-020-05966-z

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Quantitative Evaluation of Hydrogen Effects on Evolutions of Deformation-Induced ε-Martensite and Damage in a High-Mn Steel2020

    • Author(s)
      Hao Chunxi、Koyama Motomichi、Akiyama Eiji
    • Journal Title

      Metallurgical and Materials Transactions A

      Volume: 51 Issue: 12 Pages: 6184-6194

    • DOI

      10.1007/s11661-020-06021-7

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Novel -75°C SEM cooling stage: application for martensitic transformation in steel2020

    • Author(s)
      Tsuzaki Kaneaki、Koyama Motomichi、Sasaki Ryosuke、Nakafuji Keiichiro、Oie Kazushi、Shibata Akinobu、Gondo Takashi、Miyazaki Hiroya、Akamine Hiroshi、Nishida Minoru
    • Journal Title

      Microscopy

      Volume: 70 Issue: 2 Pages: 250-254

    • DOI

      10.1093/jmicro/dfaa051

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Acceleration mechanism of hydrogen-assisted fatigue crack growth in an equiatomic CoCrFeMoNi high-entropy alloy2022

    • Author(s)
      M. Koyama, S. Mizumachi, E. Akiyama, K. Tsuzaki
    • Organizer
      日本金属学会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Multi-scale in Situ Characterization of Micro-deformation During Luders Band Propagation in a Medium Mn Steel2022

    • Author(s)
      M. Koyama, R.S. Varanasi, T. Hojo, T. Yamashita, S. Morooka, T. Kawasaki, S. Harjo
    • Organizer
      The 7th International Conference on Electronic Materials and Nanotechnology for Green Environment
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Alloy design for hydrogen-resistant high-strength metals2022

    • Author(s)
      Motomichi Koyama
    • Organizer
      2022 Alloy Design Workshop
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Hydrogen effects on micro-damage arrest in multiphase steels2021

    • Author(s)
      M. Koyama, M.Y. Maeda, C. Hao, O.M. Cintho, K. Tsuzaki, T. Hojo, E. Akiyama
    • Organizer
      Asia steel 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited

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Published: 2020-04-28   Modified: 2024-01-30  

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