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Chinese researchers have developed high fatigue resistance 3D printed titanium alloys

2024-02-29 16:50

On February 29, it was reported that the Institute of Metals, Chinese Academy of Sciences, had recently prepared 3D printed titanium alloy materials with high fatigue resistance, which is expected to play a role in the aerospace field in the future.
This achievement was published in the international academic journal Nature on February 29th Beijing time.


It is understood that under ideal conditions, titanium alloys directly prepared by 3D printing technology should have natural ultra-high fatigue resistance, while defects such as pores generated during the printing process can significantly reduce the fatigue resistance of titanium alloys.


Researchers have discovered in high-temperature experiments on a certain titanium alloy material that there is a valuable heat treatment process window that can suppress the occurrence of pores. Based on this, a new process for step-by-step control of defects and microstructure has been invented, ultimately producing titanium alloy materials with almost no pores.


This material can increase the tensile fatigue strength of titanium alloy from 475 megapascals in its original state to 978 megapascals in cyclic testing.
According to researchers from the Institute of Metal Research of the Chinese Academy of Sciences, 3D printing technology is currently widely used in aerospace applications.
The new technology they have developed can increase the fatigue life by ten to hundreds of times under the same load.
Under the same expected lifespan, the applied load will increase by 10% to 15%.