Developement of Alminum alloy having high specific strength and high electric conductivity by adding small amount of transition elements

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K05056
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 26040:Structural materials and functional materials-related
• Research Institution: Kanazawa University
• Principal Investigator: Miyajima Yoji 金沢大学, 機械工学系, 准教授 (80506254)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: アルミニウム / 合金 / 巨大ひずみ加工 / 導電率 / 格子欠陥 / 高強度化

Outline of Final Research Achievements

Dut to the recent electrification of transportation equipments, there is a need for a metal material for wires and cables having both high conductivity, high strength, and light weight. Aluminum having low specific gravity is often used for such purposes. Conventionally, high strength of metallic materials has been achieved through alloying by adding large amounts of alloying elements. However, when large amounts of alloying elements are added, free electrons are scattered by the added elements. Therefore, it has been difficult to achieve high electrical conductivity by alloying.
In this study, model aluminium alloys having a small amount of transition metal elements were prepared in this study. We have shown that high strength and high conductivity can be achieved by applying spevere plastic deformation by this alloy.

Free Research Field

金属材料定量学

Academic Significance and Societal Importance of the Research Achievements

輸送用機器に使われるモーター等には，導電性金属材料がワイヤーとして使用されます．それらの軽量化のためには，高導電率化と高強度化を通じた断面積減少が必要となります．本研究によって示された，微量の遷移金属の添加による，新規アルミニウム合金が実用化される場合，重量軽減による燃費の向上を通じて化石燃料の使用量削減が実現できます．そのため，SDGs社会の実現に資することが可能となります．