The Chinese Academy of Sciences has developed a 3D printed titanium alloy with high fatigue resistance, which can be used in the aerospace field

The reporter learned from the Institute of Metal Research of the Chinese Academy of Sciences that the researchers recently prepared 3D printing titanium alloy materials with high fatigue resistance. The material is expected to play a role in aerospace in the future. The results were published in the international academic journal Nature on February 29, Beijing time.

It is understood that under ideal conditions, titanium alloys directly prepared by 3D printing technology should have natural ultra-high fatigue resistance, and the defects such as pores generated during the printing process will greatly reduce the fatigue resistance of titanium alloys. In the high temperature experiment of a certain titanium alloy material, researchers found that there is a valuable heat treatment process window, which can inhibit the appearance of pores, on this basis, invented a new process of defect and tissue step by step regulation, and finally prepared almost no pores titanium alloy material. This material can increase the tensile fatigue strength of titanium alloy from 475 mpa in the original state to 978 mpa in the cycle test.

According to Zhang Zhefeng, a researcher at the Institute of Metal Research of the Chinese Academy of Sciences, 3D printing technology is currently more widely used in aerospace applications. Their new technology, under the same load, fatigue life will be increased by ten times to hundreds of times. For the same life expectancy, the applied load will increase by 10 to 15 percent.