Fracture mechanism of textured polycrystalline magnesium alloys

• Project/Area Number: 24760578
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Structural/Functional materials
• Research Institution: Saga University
• Principal Investigator: MORITA Shigeki 佐賀大学, 工学(系)研究科(研究院), 准教授 (00314089)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: マグネシウム合金 / 変形双晶 / 集合組織 / 結晶粒径 / 疲労き裂 / 変形異方性 / マグネシウム

Research Abstract

The fatigue crack propagation behavior of textured polycrystalline magnesium alloys were investigated. The fatigue crack propagation rate is controlled by the microstructure (grain size and texture). The pre-introduced deformation twins existing at a crack tip does not influence the fatigue crack propagation rate. On the other hand, the living deformation twins raise the fatigue crack propagation rate during the cyclic loading.

Research Products

• [Journal Article] High Cycle Fatigue Properties and Cyclic Deformation Behavior of Extruded AZ61A Magnesium Alloy (2014)
  • Author(s): S. Morita and N. Hattori
  • Journal Title: Materials Science Forum or Key Engineering Materials
  • Peer Reviewed
• [Presentation] AZ31マグネシウム合金圧延材の繰返し変形・破壊挙動に及ぼす荷重負荷方向の影響 (2014)
  • Author(s): 犬童悠哉,宇都宮拓人,藤原誠也,森田繁樹,服部信祐,眞山剛
  • Organizer: 日本機械学会九州学生会卒業研究発表講演会
  • Place of Presentation: 九州大学
  • Year and Date: 2014-03-04
• [Presentation] AZ31マグネシウム合金押出板材の疲労特性に及ぼす結晶粒径の影響 (2014)
  • Author(s): 岡本悠司,堀爵仁,森田繁樹,服部信祐,染川英俊,眞山剛
  • Organizer: 日本機械学会九州学生会卒業研究発表講演会
  • Place of Presentation: 九州大学
  • Year and Date: 2014-03-04
• [Presentation] AZ31マグネシウム合金圧延材の繰返し変形・破壊挙動に及ぼす荷重負荷方向の影響 (2014)
  • Author(s): 犬童悠哉，宇都宮拓人，藤原誠也，森田繁樹，服部信祐，眞山剛
  • Organizer: 日本機械学会九州学生会 第45回卒業研究発表講演会
  • Place of Presentation: 九州大学
• [Presentation] AZ31マグネシウム合金押出板材の疲労特性に及ぼす結晶粒径の影響 (2014)
  • Author(s): 岡本悠司，堀爵仁，森田繁樹，服部信祐，染川英俊，眞山剛
  • Organizer: 日本機械学会九州学生会 第45回卒業研究発表講演会
  • Place of Presentation: 九州大学
• [Presentation] 多結晶マグネシウム合金の疲労き裂進展挙動に及ぼす変形双晶の影響 (2013)
  • Author(s): 森田繁樹,藤原誠也,眞山剛,服部信祐
  • Organizer: 日本機械学会M&M2013材料力学カンファレンス
  • Place of Presentation: 岐阜大学
  • Year and Date: 2013-10-12
• [Presentation] Influence of Deformation Twin on Fatigue Crack Growth in Extruded AZ31 Magnesium Alloy (2013)
  • Author(s): S. Morita, K. Matsushita, S. Fujiwara, T. Mayama, N. Hattori
  • Organizer: PRICM8
  • Place of Presentation: Hawaii, USA
  • Year and Date: 2013-08-06
• [Presentation] マグネシウム合金展伸材の疲労き裂進展挙動に及ぼすミクロ組織の影響 (2013)
  • Author(s): 森田繁樹
  • Organizer: 日本マグネシウム協会第21回マグネシウム技術研究発表会
  • Place of Presentation: 日本大学
  • Year and Date: 2013-06-04
  • Invited
• [Presentation] AZ31マグネシウム合金の疲労き裂進展に及ぼす変形双晶の影響 (2013)
  • Author(s): 森田繁樹,松下航也,藤原誠也,服部信祐,眞山剛
  • Organizer: 日本金属学会第152回春期大会
  • Place of Presentation: 東京理科大学
  • Year and Date: 2013-03-29
• [Presentation] High Cycle Fatigue Properties and Cyclic Deformation Behavior of Extruded AZ61A Magnesium Alloy (2013)
  • Author(s): S. Morita and N. Hattori
  • Organizer: International Conference on PROCESSING & MANUFACTURING OF ADVANCED MATERIALS(THERMEC2013)
  • Place of Presentation: Las Vegas, USA
• [Presentation] 多結晶マグネシウム合金の疲労き裂進展挙動に及ぼす変形双晶の影響 (2013)
  • Author(s): 森田繁樹，藤原誠也，眞山剛，服部信祐
  • Organizer: 日本機械学会 M&M2013材料力学カンファレンスCD-ROM, OS0406
  • Place of Presentation: 岐阜大学
• [Presentation] Influence of Deformation Twin on Fatigue Crack Growth in Extruded AZ31 Magnesium Alloy (2013)
  • Author(s): S. Morita, K. Matsushita, S. Fujiwara, T. Mayama, N. Hattori
  • Organizer: The 8th Pacific Rim International Conference on Advanced Materials and Processing (PRICM 8)
  • Place of Presentation: Hawaii, USA
• [Presentation] Fatigue-Fractured Surfaces and Crack Paths of Textured Polycrystalline Magnesium Alloys (2012)
  • Author(s): S. Morita, K. Matsushita, T. Mayama, T. Hirai, T. Enjoji and N. Hattori
  • Organizer: The 4th International Conference on Crack Paths (CO2012)
  • Place of Presentation: Gaeta, Italy
  • Year and Date: 2012-12-19
• [Presentation] High Cycle Fatigue Properties and Cyclic Deformation Behavior of Extruded AZ61A Magnesium Alloy (2012)
  • Author(s): S. Morita and N. Hattori
  • Organizer: Thermec2013
  • Place of Presentation: Las Vegas, USA
  • Year and Date: 2012-12-03
• [Presentation] AZ31マグネシウム合金圧延材のき裂先端での繰返し変形・破壊挙動 (2012)
  • Author(s): 前川博和,森田繁樹,眞山剛,服部信祐
  • Organizer: 軽金属学会第123回秋期大会
  • Place of Presentation: 千葉工業大学
  • Year and Date: 2012-11-10
• [Presentation] AZ31マグネシウム合金の変形双晶による疲労き裂成長の遅延 (2012)
  • Author(s): 松下航也,森田繁樹,眞山剛,服部信祐
  • Organizer: 軽金属学会第123回秋期大会
  • Place of Presentation: 千葉工業大学
  • Year and Date: 2012-11-10
• [Presentation] AZ31マグネシウム合金押出材の疲労き裂進展に及ぼす変形双晶の影響 (2012)
  • Author(s): 松下航也,森田繁樹,平井智紀,円城寺隆志,服部信祐
  • Organizer: 軽金属学会第122回春期大会
  • Place of Presentation: 九州大学
  • Year and Date: 2012-05-19
• [Presentation] AZ31マグネシウム合金の変形双晶による疲労き裂成長の遅延 (2012)
  • Author(s): 松下航也，森田繁樹，眞山剛，服部信祐
  • Organizer: 軽金属学会第123回春期大会
  • Place of Presentation: 千葉工業大学
• [Presentation] Fatigue-Fractured Surfaces and Crack Paths of Textured Polycrystalline Magnesium Alloys (2012)
  • Author(s): S. Morita, K. Matsushita, T. Mayama, T. Hirai, T. Enjoji and N. Hattori
  • Organizer: The 4th International Conference on Crack Paths (CP2012)
  • Place of Presentation: Gaeta, Italy
• [Remarks]
  • URL: http://www.me.saga-u.ac.jp/sentan/index.html
• [Remarks] 佐賀大学 理工学部 機械システム工学科 先端材料システム学講座
  • URL: http://www.me.saga-u.ac.jp/sentan/index.html
• [Remarks] 佐賀大学 理工学部 機械システム工学科 先端材料システム学講座
  • URL: http://www.me.saga-u.ac.jp/sentan/index.html