紀要論文

紀要論文

text

Transactions of JWRI. 2009, 38(2), p. 37-41

Microstructural and Mechanical Properties of Ti Composite Reinforced with TiO₂ Additive Particles

英語

text

2009-12

Titanium (Ti) alloys can be applied to various products in aircraft, automotive and motor cycles industries because of their weight reduction effects, superior mechanical responses and high corrosion resistance. Ti-6Al-4V (Ti64) is one of the most common Ti alloys used in structural components. It shows a high tensile strength of 900MPa or more. On the other hand, the poor elongation of about 10% is one of the disadvantages of Ti64 alloys. In addition, high cost additional elements such as vanadium and difficult melting processes increase the total material cost of Ti64. That is why its applications are limited to high-performance products. In this study, a highly strengthened pure titanium has been developed using high-purity titanium powder (HP-Ti) by elemental mixing with titanium oxide (TiO₂) powder and avoiding the melting process. The main strengthening mechanism of this material is the oxide dispersion strengthening (ODS) by elementally mixed TiO₂ in fine dispersoids. Elementally mixed powder of HP-Ti and TiO₂ was consolidated by the spark plasma sintering (SPS) process. To improve the ductility of sintered material, hot extrusion was applied to sintered HP-Ti. For example, the extruded HP-Ti mixed with 0.8wt% of TiO₂ particles indicated a high tensile strength of 863MPa and good elongation of 26.7%.

10.18910/6987

6987

Microstructural and Mechanical Properties of Ti Composite Reinforced with TiO₂ Additive Particles

大阪大学接合科学研究所

英語

2009-12

Transactions of JWRI

38

2

37

41

https://hdl.handle.net/11094/6987

10.18910/6987

https://doi.org/10.18910/6987