Concurrently strengthened severely deformed metallic materials by ultra-fine grained and precipitation hardenings

• Project/Area Number: 25420775
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Material processing/Microstructural control engineering
• Research Institution: Kanazawa University
• Principal Investigator: WATANABE Chihiro 金沢大学, 機械工学系, 教授 (60345600)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2013: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
• Keywords: 巨大ひずみ加工 / 高圧ねじり加工 / 析出強化型銅合金 / 結晶粒微細化 / 析出硬化型銅合金

Outline of Final Research Achievements

The microstructure and aging behavior in Cu based age-hard enable alloys processed by high-pressure torsion (HPT) were systematically investigated. The effects of processing temperature on attainable maximum hardness by HPT and age-hardening behavior of the alloys after HPT were clearly explained. Moreover, the influence of natural aging on the artificial aging behavior of Cu-Be and Cu-T alloys systems were discussed. The obtained results in this study shed light on strengthening of the metallic materials by grain-refinement strengthening and precipitation hardening simultaneously.

Research Products

• [Journal Article] 銅基析出強化型合金の強ひずみ加工後の析出挙動に及ぼす自然時効の影響 (2016)
  • Author(s): 日比野将和，渡邊千尋，戸高義一，佐藤 渉
  • Journal Title: 銅と銅合金 Volume: 55
  • NAID: 40020925794
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Effects of Natural Aging on Age-Hardening Behavior of Cu-Be-Co and Cu-Ti Alloys Processed by High-Pressure Torsion (2016)
  • Author(s): C. Watanabe, M. Hibino, R. Monzen, S. Ii, K. Tsuchiya
  • Journal Title: MATERIALS TRANSACTIONS Volume: 57 Issue: 9 Pages: 1471-1475
  • DOI: 10.2320/matertrans.MH201502
  • NAID: 130005289935
  • ISSN: 1345-9678, 1347-5320
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] 析出硬化型Cu合金の強ひずみ加工後の析出挙動に及ぼす自然時効の影響 (2015)
  • Author(s): 日比野将和，渡邊千尋，門前亮一，井 誠一郎，土谷幸一
  • Journal Title: 銅と銅合金 Volume: 54 Pages: 32-36
  • NAID: 40020551459
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Microstructure and aging behavior of Cu-Be alloy processed by high-pressure torsion (2014)
  • Author(s): C. Watanabe, R. Monzen, S. Ii and K. Tsuchiya
  • Journal Title: Materials Science Forum Volume: 783-786 Pages: 2707-2712
  • DOI: 10.4028/www.scientific.net/msf.783-786.2707
  • NAID: 120005463337
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] HPT加工を施したCu-Be合金の時効挙動と組織 (2014)
  • Author(s): 大西朗嗣，渡邊千尋，門前亮一，井誠一郎，土谷浩一
  • Journal Title: 銅と銅合金 Volume: 53 Pages: 11-15
  • NAID: 40020182662
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Influence of Co on Strength and Microstructure of Cu-Ni-Co-Si Alloy (2014)
  • Author(s): 井澤幸太朗，小澤 敦，北 和久，渡邊千尋，門前亮一
  • Journal Title: Journal of the Society of Materials Science, Japan Volume: 63 Issue: 5 Pages: 401-408
  • DOI: 10.2472/jsms.63.401
  • NAID: 130004749897
  • ISSN: 0514-5163, 1880-7488
  • Peer Reviewed / Open Access
• [Journal Article] Influence of Thermomechanical Treatment on Strength of a Cu-21 mass%Ni- 5.5 mass%Sn Alloy (2014)
  • Author(s): 小澤敦，渡邊千尋，門前亮一，村松尚国
  • Journal Title: Journal of the Japan Institute of Metals and Materials Volume: 78 Issue: 9 Pages: 344-349
  • DOI: 10.2320/jinstmet.J2014021
  • NAID: 130004685001
  • ISSN: 0021-4876, 1880-6880, 2433-7501
  • Peer Reviewed / Open Access
• [Presentation] 銅基析出強化型合金の巨大ひずみ加工後の析出挙動におよぼす自然時効の影響 (2015)
  • Author(s): 日比野将和，渡邊千尋，門前亮一，戸高義一
  • Organizer: 日本銅学会第55回講演大会
  • Place of Presentation: 大阪大学吹田キャンパス
  • Year and Date: 2015-11-02
• [Presentation] Two-step age-hardening behavior of Cu-Be and Cu-Ti alloys processed by high-pressure torsion (2015)
  • Author(s): C. Watanabe, R. Monzen, S. Ii, K. Tsuchiya
  • Organizer: International Conference on Solid-Solid Transformations in Inorganic Materials 2015
  • Place of Presentation: カナダ，ウィスラー
  • Year and Date: 2015-06-28
  • Int'l Joint Research
• [Presentation] 析出硬化型Cu合金の強ひずみ加工後の析出挙動に及ぼす自然時効の影響 (2014)
  • Author(s): 日比野将和、渡邊千尋、門前亮一、井誠一郎、土谷浩一
  • Organizer: 日本銅学会第54会講演大会
  • Place of Presentation: 横浜国立大学三沢キャンパス
  • Year and Date: 2014-11-08 – 2014-11-09
• [Presentation] HPT加工を施したCu-Be合金の時効挙動と組織 (2013)
  • Author(s): 大西朗嗣，渡邊千尋，門前亮一，井誠一郎，土谷浩一
  • Organizer: 日本銅学会第53回講演大会
  • Place of Presentation: 関西大学
• [Presentation] Microstructure and aging behavior of Cu-Be alloy processed by high-pressure torsion (2013)
  • Author(s): C. Watanabe, R. Monzen, S. Ii and K. Tsuchiya
  • Organizer: 8th International Conference of Processing & Manufacturing of Advanced Materials
  • Place of Presentation: Las Vegas, USA