Fabrication of electrodeposited bulk nanocrystalline Al alloys with high strength and ductility without working and heat treatment process

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K14441
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Material processing/Microstructural control engineering
• Research Institution: Osaka Prefecture University
• Principal Investigator: Takigawa Yorinobu 大阪府立大学, 工学(系)研究科(研究院), 准教授 (70382231)
• Research Collaborator: KUMA Chisaki 大阪府立大学, 工学研究科, 大学院生 ; SATO Kana 大阪府立大学, 工学研究科, 大学院生
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 電解析出法 / アルミニウム合金 / 延性 / 脆化元素低減 / ナノ結晶材料 / 固溶強化

Outline of Final Research Achievements

Fabrication of electrodeposited bulk nanocrystalline Al alloys with high strength and ductility from a dimethylsulfone bath was conducted. At first, we developed fabrication process decreasing sulfur and chlorine contents which are the embrittle elements in Al. Next, we chose Cu, Fe, Mn and Zr for grain refinement and solid solution strengthening of Al form first principles calculations. We successfully fabricated bulk Al-Cu, Al-Mn and Al-Zr alloys. As the results of tensile tests, an Al-Zr alloy exhibited tensile strength of 156 MPa and tensile ductility of 20%, which is comparable to the balance of strength and ductility in commercial non-heat-treatable aluminum alloys.

Free Research Field

材料プロセス