Effects of microstructure and strain incompatibility on micro-crack generation

• Project/Area Number: 22560073
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Materials/Mechanics of materials
• Research Institution: Yokohama National University
• Principal Investigator: UMEZAWA Osamu 横浜国立大学, 大学院・工学研究院, 教授 (20343171)
• Co-Investigator(Kenkyū-buntansha): MOROOKA Satoshi 横浜国立大学, 大学院・工学研究院, 研究教員 (10534422)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2010: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 疲労き裂 / ひずみ不整合 / 不均一変形 / 中性子散乱回折 / 粒応力 / 完全拘束モデル

Research Abstract

Heterogeneous deformation in high-cycle fatigue of a-titanium alloy, austenitic steel and silicon steel has been characterized with electron or neutron diffraction techniques as well as modeling based on Taylor analysis. Subsurface crack generation model due to strain incompatibility in the vicinity of grain boundaries was proposed; the incompatibility may form a microstructural cracking with crack opening stress and microcrack growth with heterogeneous slip in the specimen interior.

Research Products

• [Journal Article] 微粒子ピーニングによるアルミダイカスト材の疲労強度向上 (2013)
  • Author(s): 井澤龍介, 梅澤 修, 中村紀夫，高木眞一
  • Journal Title: 鋳造工学 Volume: 85 Pages: 155-160
  • Peer Reviewed
• [Journal Article] A Modeling Approach to Evaluate Grain Interaction Induced by {111}<011> Planar Slips in Face-centered Cubic Polycrystalline Materials (2012)
  • Author(s): M. Morita, O. Umezawa
  • Journal Title: ISIJ International Volume: 52 Issue: 6 Pages: 1153-1161
  • DOI: 10.2355/isijinternational.52.1153
  • NAID: 10031126814
  • ISSN: 0915-1559, 1347-5460
  • Peer Reviewed
• [Journal Article] Quantitative Analysis of Tensile Deformation Behavior by In-Situ Neutron Diffraction for Ferrite-Martensite Type Dual-Phase Steels (2012)
  • Author(s): 諸岡 聡,梅澤 修, Stefanus, Harjo, 長谷川浩平,田路勇樹
  • Journal Title: Tetsu-to-Hagane Volume: 98 Pages: 311-319
  • DOI: 10.2355/tetsutohagane.98.311
  • NAID: 130002127311
  • ISSN: 0021-1575, 1883-2954
  • Peer Reviewed
• [Journal Article] Slip Deformation Analysis Based on Full Constraints Model for α-Titanium Alloy at Low Temperature (2011)
  • Author(s): M. Morita, O. Umezawa
  • Journal Title: MATERIALS TRANSACTIONS Volume: 52 Issue: 8 Pages: 1595-1602
  • DOI: 10.2320/matertrans.L-M2011815
  • NAID: 130004454782
  • ISSN: 1345-9678, 1347-5320
  • Peer Reviewed
• [Journal Article] Subjects on fatigue crack generation in high strength alloys for long-life design (2011)
  • Author(s): O. Umezawa, S. Morooka
  • Journal Title: Materials Science Forum Volume: Vol.685 Pages: 278-284
  • DOI: 10.4028/www.scientific.net/msf.685.278
  • Peer Reviewed
• [Presentation] 高Si鋼の変形組織と弾性場の解析 (2013)
  • Author(s): 神田純一,諸岡 聡, 梅澤 修
  • Organizer: 日本鉄鋼協会第165回春季講演大会
  • Place of Presentation: 東京電機大
  • Year and Date: 2013-03-28
• [Presentation] チタン合金の塑性変形挙動に及ぼす粒応力分配と集合組織の影響 (2012)
  • Author(s): 諸岡 聡, 梅澤 修
  • Organizer: 日本金属学会分科会 第2回「結晶と組織の配向制御による材料高性能化」研究会
  • Place of Presentation: 倉敷市芸文館
  • Year and Date: 2012-10-12
• [Presentation] 高強度自動車用薄鋼板開発に向けた降伏・加工硬化挙動の4次元応力解析 (2012)
  • Author(s): 諸岡聡, 梅澤修, ステファヌス ハルヨ, 長谷川浩平, 田路勇樹
  • Organizer: ISIJ第163回春期講演大会
  • Place of Presentation: 横浜国大
  • Year and Date: 2012-03-30
• [Presentation] V添加非調質鋼における高サイクル疲労破壊挙動解析 (2012)
  • Author(s): 諸岡聡, 田尻大裕, 梅澤修
  • Organizer: ISIJ第163回春期講演大会
  • Place of Presentation: 横浜国大
  • Year and Date: 2012-03-28
• [Presentation] αチタ ン合金の低温疲労強度に及ぼす結晶粒方位ランダム化の影響 (2011)
  • Author(s): 湯浅貴幸, 梅澤 修, 小野嘉則
  • Organizer: 日本鉄鋼協会第162回秋季講演大会
  • Place of Presentation: 大阪大
  • Year and Date: 2011-09-22
• [Presentation] αチタン合金の低温疲労強度に及ぼす結晶粒方位ランダム化の影響 (2011)
  • Author(s): 湯浅貴幸, 梅澤修, 小野嘉則
  • Organizer: ISIJ第162回秋期講演大会
  • Place of Presentation: 大阪大
  • Year and Date: 2011-09-22
• [Presentation] Analysis of heterogeneous deformation behavior by full constraints model in alpha-titanium alloy (2011)
  • Author(s): M. Morita, O. Umezawa
  • Organizer: Proceedings of the 12th World Conference on Titanium
  • Place of Presentation: China National Convention Center(中国)
  • Year and Date: 2011-06-22
• [Presentation] Analysis of heterogeneous deformation behavior by full constraints model in alpha-titanium alloy (2011)
  • Author(s): M.Morita, O.Umezawa
  • Organizer: 12th World Conference on Titanium
  • Place of Presentation: China National Convention Center
  • Year and Date: 2011-06-20
• [Presentation] In-situ neutron diffraction study on work-hardening behavior in a ferrite-martensite dual phase steel (2011)
  • Author(s): S.Morooka, N.Sato, M.Ojima, S.Harjo, Y.Adachi, Y.Yomota, O.Umezawa
  • Organizer: JSAE Annual Congress Proceedings (Spring), No.19-11
  • Place of Presentation: Pacifico Yokohama
  • Year and Date: 2011-05-19
• [Presentation] Influence of heterogeneous deformation on microstructural cracking in alpha-titanium alloys (2011)
  • Author(s): M. Morita, S. Morooka, O. Umezawa
  • Organizer: TMS 2011 Annual Meeting & Exhibition
  • Place of Presentation: San Diego Convention Center (米国)
  • Year and Date: 2011-03-02
• [Presentation] Influence of heterogeneous deformation on microstructural cracking in alpha-titanium alloys (2011)
  • Author(s): M.Morita, S.Morooka, O.Umezawa
  • Organizer: TMS 2011 Annual Meeting & Exhibition
  • Place of Presentation: SanDiego Convention Center,(米国)
  • Year and Date: 2011-03-02
• [Presentation] Influence of recovery on high-cycle fatigue property of 3 mass%Si steel (2010)
  • Author(s): K.Nishiwaki, S.Morooka, O.Umezawa
  • Organizer: 臼本MRS学術シンポジウム
  • Place of Presentation: 横浜市,横浜情報文化センター
  • Year and Date: 2010-12-21
• [Presentation] Subjects on fatigue crack generation in high strength alloys for long-life design (2010)
  • Author(s): O.Umezawa
  • Organizer: International Conference on EcoBalance 2010
  • Place of Presentation: 東京都,日本未来館
  • Year and Date: 2010-11-12
• [Presentation] 高強度オーステナイト鋼の堆積転位による結晶粒界近傍の協調変形と応力場形成方位の解析 (2010)
  • Author(s): 盛田元彰, 諸岡聡, 梅澤修
  • Organizer: 日本金属学会第5回「結晶方位と組織の制御」研究会
  • Place of Presentation: 岐阜県高山市,飛騨地域地場産業振興センター
  • Year and Date: 2010-10-21
• [Presentation] StefanusHarjo,その場中性子回折によるα-チタン合金の不均一変形挙動解析 (2010)
  • Author(s): 諸岡 聡,梅澤 修
  • Organizer: 日本鉄鋼協会秋期講演大会
  • Place of Presentation: 北海道大
  • Year and Date: 2010-09-25
• [Presentation] その場中性子回折によるα・チタン合金の不均一変形挙動解析 (2010)
  • Author(s): 諸岡聡, 梅澤修, Stefanus Harjo
  • Organizer: 日本鉄鋼協会秋期講演大会
  • Place of Presentation: 札幌市,北海道大学
  • Year and Date: 2010-09-25
• [Presentation] Relationship between subsurface fatigue crack generation and strain incompatibility (2010)
  • Author(s): O.Umezawa
  • Organizer: New Methods of Damage and Failure Analysis of Structural Parts 2010
  • Place of Presentation: VSB-Technical University of Ostrava,チヱコ共和国
  • Year and Date: 2010-09-08
• [Presentation] Effect of Si Cntent on Fatigue Fracture Behavior of Hot-rolled High-Silicon Steels
  • Author(s): T. Yamazaki, S. Morooka, O. Umezawa
  • Organizer: 4th International Symposium between Yokohama National University and Changwon National University
  • Place of Presentation: 三浦マホロバマインズ
• [Presentation] Novel processes locally to modify aluminum die cast for improving its fatigue strength
  • Author(s): R. Izawa, O. Umezawa
  • Organizer: 5th Inter. Workshop on New Method of Damage and Failure Analysis of Structural Parts
  • Place of Presentation: TU Ostrava（チェコ）
• [Presentation] In-situ neutron diffraction study on tensile deformation behavior of steels
  • Author(s): S. Morooka, H.Kawata, S.Harjo, O. Umezawa
  • Organizer: 5th Inter. Workshop on New Method of Damage and Failure Analysis of Structural Parts
  • Place of Presentation: TU Ostrava（チェコ）
• [Presentation] Subsurface crack generation and flacking under rolling contact fatigue
  • Author(s): O. Umezawa, S. Morooka, J. Brumek
  • Organizer: 5th Inter. Workshop on New Method of Damage and Failure Analysis of Structural Parts
  • Place of Presentation: TU Ostrava（チェコ）
• [Presentation] Crack Growth Modeling Under Rolling Contact Fatigue
  • Author(s): J. Brumek, O. Umezawa
  • Organizer: 日本鉄鋼協会第164回秋季講演大会
  • Place of Presentation: 愛媛大
• [Presentation] DP鋼の加工硬化挙動に及ぼす内部応力とSi添加量の影響
  • Author(s): 諸岡 聡, 川田裕之, Stefanus Harjo, 梅澤 修
  • Organizer: 日本鉄鋼協会第164回秋季講演大会
  • Place of Presentation: 愛媛大
• [Presentation] チタン合金の塑性変形挙動に及ぼす粒応力分配と集合組織の影響
  • Author(s): 諸岡 聡, 梅澤 修
  • Organizer: 日本金属学会分科会 第2回「結晶と組織の配向制御による材料高性能化」研究会
  • Place of Presentation: 倉敷市芸文館
• [Presentation] Subsurface Crack Generation Under Rolling Contact Fatigue in Steels
  • Author(s): O. Umezawa, S. Morooka, J. Brumek
  • Organizer: The First Symposium on Ecomaterials and Processing Technology
  • Place of Presentation: Beijing University of Technology（中国）
  • Invited
• [Presentation] 微粒子ピーニングによるアルミダイカスト部品の疲労強度向上
  • Author(s): 井澤龍介，梅澤 修，中村紀夫，高木眞一
  • Organizer: 2012日本ダイカスト会議
  • Place of Presentation: パシフィコ横浜
• [Presentation] 高Si鋼の変形組織と弾性場の解析
  • Author(s): 神田純一，諸岡 聡, 梅澤 修
  • Organizer: 日本鉄鋼協会第165回春季講演大会
  • Place of Presentation: 東京電機大