Analysis of the effect of fretting wear on key structural components of TB6 titanium alloy with actual failure cases

2018 International Conference on Advanced Electronic Materials, Computers and Materials Engineering

材料科学;无线电电子学;计算机科学

Kong, Huanping^1,2,3 ; Liu, Changkui^1,2,3

AECC Beijing Institute of Aeronautical Materials, Beijing, China^1

Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation, Beijing, China^2

Aviation Key Laboratory of Science and Technology on Aeronautical Materials Testing and Evaluation, Beijing, China^3

关键词: Breakthrough point;    Energy spectrum analysis;    Fatigue crack initiation;    Functionalizations;    Microstructure examination;    Military industries;    Structural component;    Surface integrity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/439/2/022011/pdf
DOI  :  10.1088/1757-899X/439/2/022011

来源: IOP

【 摘 要 】

As the main metal structure materials, titanium alloys have been widely applied in aerospace and other military industries. Titanium alloy develops on the way of high performance and functionalization. Compared with other materials, titanium alloy has high surface integrity and high fretting damage sensitivity. In this paper, the failure case of TB6 high strength titanium alloy key structural parts is taken as the breakthrough point to analyze the effect of surface fretting wear damage on its performance. The appearance inspection, macro and micro morphology observation and energy spectrum analysis were carried out, and the microstructure examination and hardness test were also adopted. The results showed that the fracture property of lug of TB6 high strength titanium alloy was fatigue fracture, and the fretting wear damage of the inner surface of lug hole was the main reason for the fatigue crack initiation. This case is a typical example of titanium alloy structure failure due to fretting wear, which provides reference for the prevention of the recurrence of such faults.