Evaluation of unique behavior of elastic modulus and enhance compatibility between low-elastic modulus and high-strength for Ti-Mn alloys

2014 Fiscal Year Final Research Report

• Project/Area Number: 25820367
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Material processing/Microstructural control engineering
• Research Institution: Tohoku University
• Principal Investigator: CHO Ken 東北大学, 金属材料研究所, 助教 (00633661)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 高強度化 / 低弾性率化 / 非熱的ω相 / 変形誘起ω相 / 固溶強化

Outline of Final Research Achievements

Microstructures and mechanical properties, including tensile properties and Young’s modulus, of Ti-Mn alloys fabricated by the metal injection molding were investigated.
It is found that the formation of athermal ω phase and solid solution strengthening by Mn are reasons for the low-Young’s modulus and high-strength.
The Ti-Mn alloys fabricated by the metal injection molding show lower Young’s modulus and higher-strength compared with Ti-6Al-4V alloy, which is the most widely used titanium alloy. Moreover, the ultimate tensile strength and 0.2% proof stress of Ti-13Mn increase from 888 MPa to 1850 MPa and from 827 MPa to 1820 MPa, respectively, after cold-rolling at a reduction ratio of 90%. These strength are almost highest strength for Ti alloys.

Free Research Field

構造材料