|Effect of Composition Gradient on Microstructure and Properties of Laser Deposition TC4/TC11 Interface|
|Alternative Title||Effect of Composition Gradient on Microstructure and Properties of Laser Deposition TC4/TC11 Interface
|He Bo; Xing Meng; Yang Guang; Xing Fei; Liu Xiangyu
|Source Publication||ACTA METALLURGICA SINICA
|Abstract||In recent years, gradient composites have been increasingly used in life and industry. The rapid development of laser deposition manufacturing (LDM) technology realizes the manufacturing of dissimilar-metal gradient composite structure used for main bearing component. In this work, laser deposited TC4/TC11 gradient composite structures are taken as the research objects. Since there are few studies on TC4/TC11 titanium alloy, this work focuses on the effect of heat treatment on the microstructures and properties of TC4/TC11 titanium alloy, providing the basis to improve the quality and serving life of laser deposited gradient composite structure. Based on comparative study on the microstructures, residual static performances, tensile fractures, room temperature abrasion results and microhardnesses of laser deposition TC4/TC11 titanium alloy specimens with different composition gradients under different heat treatments, the ways to improve the laser deposition TC4/TC11 titanium alloy microstructure and the comprehensive mechanical properties were explored. Results show that when the temperature of solution and ageing treatment rises to 970 degrees C, the length-width ratio of alpha laths of TC4/TC11 titanium alloy is less than that of the other heat treatment samples. The globular alpha phase and the short bar alpha phase are significantly increased. The microstructure of the three-layer transition zone is more uniform and orderly, and the transition interface almost disappears. With the increase of the number of transition layers, the strength and plasticity of solution and ageing samples with different component gradients are increased. The frictional coefficient curve of sample with 1 transition layer is similar to that of the sample with 3 transition layers. The friction coefficient of the sample with the transition layer of 0 is relatively small. The wear mechanism of solution and ageing samples with different component gradients are mainly lamination wear and adhesive wear. From the as-deposited state to the stress relieved and finally to the ageing state of solid solution, the corresponding hardness of the sample with different component gradients increases successively.|
laser deposition manufacturing
|Funding Project||[National Key Research and Development Program of China]
; [Civil Aircraft Special Scientific Research Project of Ministry of Industry and Information Technology]
; [Scientific Research Project of Liaoning Provincial Department of Education]
; [Open Fund of Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process]
He Bo,Xing Meng,Yang Guang,et al. Effect of Composition Gradient on Microstructure and Properties of Laser Deposition TC4/TC11 Interface[J]. ACTA METALLURGICA SINICA,2019,55(10):1251-1259.
He Bo,Xing Meng,Yang Guang,Xing Fei,&Liu Xiangyu.(2019).Effect of Composition Gradient on Microstructure and Properties of Laser Deposition TC4/TC11 Interface.ACTA METALLURGICA SINICA,55(10),1251-1259.
He Bo,et al."Effect of Composition Gradient on Microstructure and Properties of Laser Deposition TC4/TC11 Interface".ACTA METALLURGICA SINICA 55.10(2019):1251-1259.
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