Development of novel CoV-based shape memory alloys showing anomalous martensitic transformation behaviors

2017 Fiscal Year Final Research Report

• Project/Area Number: 16H06632
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Physical properties of metals/Metal-base materials
• Research Institution: Tohoku University
• Principal Investigator: XU XIAO 東北大学, 工学研究科, 助教 (20781389)
• Project Period (FY): 2016-08-26 – 2018-03-31
• Keywords: 形状記憶合金 / 磁気転移 / マルテンサイト変態 / リエントラント変態

Outline of Final Research Achievements

Recently, a cooling-induced shape memory effect was reported by our research group in a Co-based Heusler alloy system. However, within the Co-based Heusler alloys, there are few reports on the thermoelastic martensitic transformation behavior, which is a vital phenomenon for the realization of shape memory effect. In this research, we developed a novel Co-V-Ga shape memory alloy showing thermoelastic martensitic transformation. Furthermore, in a limited composition range, an anomalous martensitic transformation behavior was found, where the magnetism was observed greatly changes during the martensitic transformation.

Free Research Field

金属材料学