Creation of pure titanium with high strength by low temperature nitriding under the high rate nitrogen diffusion

2014 Fiscal Year Final Research Report

• Project/Area Number: 24760090
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Materials/Mechanics of materials
• Research Institution: Kobe University (2014); Ritsumeikan University (2012-2013)
• Principal Investigator: KIKUCHI Shoichi 神戸大学, 工学(系)研究科(研究院), 助教 (80581579)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 窒化 / チタン / 強度 / 疲労強度

Outline of Final Research Achievements

The purpose of this study is to improve the strength of commercially pure titanium by low temperature nitriding. To diffuse nitrogen into pure titanium even at low temperature, crystal grains of titanium were refined by a severe plastic deformation process. Low temperature nitriding increased surface hardness and low temperature nitrided specimen showed higher strength compared to the conventional nitrided one. This is because the low temperature nitriding suppresses the grain-coarsening of pure titanium and forms a nitrogen compound with lower Young's modulus.

Free Research Field

材料強度学