Development of precipitation-hardenable magnesium sheet alloys with strong and rapid age-hardening response

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K15067
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 26050:Material processing and microstructure control-related
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: Bian Mingzhe 国立研究開発法人産業技術総合研究所, 材料・化学領域, 研究員 (30848320)
• Project Period (FY): 2020-04-01 – 2022-03-31
• Keywords: マグネシウム合金 / 時効硬化 / 混合エンタルピー / 原子半径 / 析出物

Outline of Final Research Achievements

This project successfully developed new types of precipitation-hardenable Mg wrought alloys with quick age-hardening response. In addition, this project demonstrated that the mixing enthalpy value between the solute elements and the atomic radius of solute atoms are important factors in designing Mg alloys with fast aging kinetics. However, the hardness increment is rather low. Further work is required to enhance the hardness increment by the short-time artificial aging in order to compete with 6000 series Al alloys.

Free Research Field

金属材料工学

Academic Significance and Societal Importance of the Research Achievements

Precipitation has not been widely adopted in commercial magnesium alloys due to their poor and sluggish age-hardening response. This project aims to provide a knowledge platform that can provide us valuable insight into the formation mechanism of the precipitates in magnesium alloys.