Development of aluminum alloys excellent in strength and ductility based on first-principles calculations

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K21294
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Structural/Functional materials; Material processing/Microstructural control engineering
• Research Institution: Osaka Prefecture University
• Principal Investigator: Uesugi Tokuteru 大阪府立大学, 工学(系)研究科(研究院), 准教授 (10405342)
• Research Collaborator: TAKIGAWA Yorinobu 大阪府立大学, 大学院工学研究科, 教授 (70382231) ; HIGASHI Kenji 大阪府立大学, 大学院工学研究科, 教授 (50173133)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 第一原理計算 / Al合金 / 高強度 / 高延性 / 粒界強化

Outline of Final Research Achievements

Al-8Mg-0.2Zr alloy has been developed from the first-principles calculations. The aim of this study is achieving high strength and good ductility of Al-8Mg-0.2Zr alloy by work hardening, precipitation strengthening and grain refinement strengthening. As a result, the grain refinement by friction stir processing was effective as a means to achieve high strength and good ductility of Al-8Mg-0.2Zr. The newly developed Al-8Mg-0.2Zr alloy after friction stir processing exhibited high tensile strength of 435 MPa along with the large elongation to failure up to 40 %.

Free Research Field

計算材料科学・構造材料