1.State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China 2.State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China 3.Institute of Metal Research, Chinese Academy of Sciences, Shenyang National Laboratory for Materials Science, Shenyang 110016, China
To accelerate researching newtype titanium alloys with improved mechanical properties and to lower cost at the same time are very important for the advanced equipments of our country. As structural material, strength, ductility and toughness are key factors for performance of structural parts. Some physical properties, such as elastic modulus, heat conductivity, diffusion coefficient, thermal expansion coefficient and specific heat, have been calculated or measured with highthroughput computation and experiments. However, mechanical properties, such as strength, ductility and toughness, cannot be calculated with computational methods due to lack of models and enough data. The mechanical properties are much more dependent on microstructures than compositions. Therefore, the key genes for advanced titanium alloys are compositions, phases/microstructures and defects of crystals. The relationship between chemical composition and phase can be founded with firstprinciples calculation, and dependence of phase on composition can be measured with diffusionmultiple approach efficiently. Microstructural evolution can be predicted with phasefield models. The mechanical properties of individual unit of microstructures can be measured with nanomechanical methods, such as nano indentation and compressive or tensile methods. The above results and data should be integrated into database for titanium alloys and be used to accelerate researching newtype titanium alloys to meet great needs of advanced titanium alloys in key industrial fields of our country.