Improvements of properties of Cu-based alloys by aging in hydrogen atmosphere in being associated with new precipitation mode

• Project/Area Number: 23246123
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Material processing/treatments
• Research Institution: Tohoku University
• Principal Investigator: OKADA Masuo 東北大学, 工学(系)研究科(研究院), 名誉教授 (80133049)
• Co-Investigator(Kenkyū-buntansha): KAMEGAWA Atsunori 東北大学, 大学院工学研究科, 准教授 (90292242)
• Research Collaborator: KURIIWA Takahiro
• Project Period (FY): 2011-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000); Fiscal Year 2014: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2013: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2012: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
• Keywords: 水素 / Cu-Ti合金 / Cu-Cr-Zr合金 / Cu-Cr-Zr-Ti合金 / スピノーダル分解 / 水素中時効熱処理 / 水素有効機能 / ナノ材料 / 電子・電気材料

Outline of Final Research Achievements

Effects of hydrogen heat-treatment on mechanical and electrical properties of commercialized copper-based alloy were investigated.
Optimum composition of Cu-Ti alloy for strength enhancement by hydrogen heat-treatment was Cu-3mass%Ti. It was found that hydrogenation followed by heat-treatment in vacuum was effective to enhance the workability of the alloys and its electrical conductivity.
The addition of Ti into Cu-Cr-Zr alloys heat-treated in hydrogen was effective to improve their tensile strength. The tensile strength and electrical conductivity of the Cu-0.2Cr-0.6Zr-0.5Ti alloy after hydrogen heat-treatment at 400C for 5h were 665MPa and 56%IACS, respectively.

Research Products

• [Journal Article] Effects of dehydrogenation heat-treatment on electrical-mechanical properties for hydrogenated Cu-3 mass%Ti alloys (2013)
  • Author(s): Atsunori Kamegawa, Takahiro Kuriiwa, Masuo Okada
  • Journal Title: Journal of Alloys and Compounds Volume: 566 Pages: 1-4
  • DOI: 10.1016/j.jallcom.2013.02.121
  • Peer Reviewed
• [Journal Article] New useful function of hydrogen in materials (2013)
  • Author(s): Masuo Okada, Jun Nakahigashi, Asaya Fujita, Miho Yamauchi, Atsunori Kamegawa
  • Journal Title: Journal of Alloys and Compounds Volume: 580 Pages: S401-S405
  • DOI: 10.1016/j.jallcom.2013.03.225
  • Peer Reviewed
• [Journal Article] Microstructures and Electrical-Mechanical Properties of Cu-Cr-Zr and Cu-Cr-Z-Ti Alloys Heat-treated in Hydrogen (2013)
  • Author(s): Atsunori Kamegawa, Yuta Abiko, Takahiro Kuriiwa and Masuo Okada
  • Journal Title: Proceedings of the eighth triennial Pacific Rim International Congress for Advanced Materials and Processing Volume: PRICM8 Pages: 2461-2468
  • Peer Reviewed
• [Presentation] 高圧合成法による新規水素貯蔵材料の探索と水素を利用した熱処理と材料設計 (2015)
  • Author(s): 亀川厚則
  • Organizer: 水素エネルギー協会 第146回定例研究会
  • Place of Presentation: 東京都・東京大学 武田先端ビル
  • Year and Date: 2015-02-02
  • Invited
• [Presentation] Microstructures and Electrical-Mechanical Properties of Cu-Cr-Zr and Cu-Cr-Zr-Ti Alloys Heat-Treated in Hydrogen (2013)
  • Author(s): Atsunori Kamegawa, Yuta Abiko, Takahiro Kuriiwa and Masuo Okada
  • Organizer: 8th Pacific Rim International Congress on Advanced Materials and Processing (PRICM-8)
  • Place of Presentation: アメリカ合州国・ハワイ州・ワイコロア
• [Presentation] 水素の有効機能と新規(Mg,Li)系水素化物の超高圧合成
  • Author(s): 岡田 益男、亀川 厚則
  • Organizer: 日本化学会第94春季年会
  • Place of Presentation: 愛知県名古屋市
  • Invited
• [Presentation] 超高圧合成法による新規水素貯蔵材料の探索と水素プロセスによる合金の微細組織変化
  • Author(s): 亀川厚則
  • Organizer: 日本金属学会春期大会
  • Place of Presentation: 東京理科大学
  • Invited
• [Presentation] 水素中時効処理によりCu-3mass%Ti合金に導入された水素の熱的安定性と脱水素熱処理条件による合金の電気的・機械的特性の変化
  • Author(s): 亀川厚則
  • Organizer: 日本金属学会秋期大会
  • Place of Presentation: 沖縄県宜野湾市