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何波,刘杰,杨光.过渡层数对激光沉积制造TC4/TC11连接界面的组织及性能的影响[J].稀有金属材料与工程(英文),2019,47(3):910~915.[He Bo,Liu Jie and Yang Guang.Effect of transition layers on Microstructure and properties of TC4/TC11 interface fabricated by laser deposition[J].Rare Metal Materials and Engineering,2019,47(3):910~915.]
Effect of transition layers on Microstructure and properties of TC4/TC11 interface fabricated by laser deposition
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Received:July 31, 2017  Revised:September 21, 2017
Key words: laser deposition manufacturing  titanium alloy  microstructure  properties  gradient materials  
Foundation item:辽宁省自然科学基金资助(201302411)
Author NameAffiliation
He Bo,Liu Jie and Yang Guang  
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      TC4/TC11 dual alloy specimens with different component gradients in the transition zone, were prepared by laser deposition technique. The effects of different transition layer number and different heat treatment on the microstructure, tensile properties and micro-hardness of TC4/TC11 dual alloy interface were investigated. The results show that the transition layer number has a great influence on the morphology of the microstructure, and the increase of the transition layer reduces the interface difference between TC4 and TC11 alloys and makes the micro-hardness distribution more uniform. The change of deposited TC4/TC11 transition basket-weave microstructure is obvious, the microstructure after stress relief annealing is much more uniform and the microstructure after solution-aging treatment is much coarser and the difference is obvious. Form the room temperature tensile test results on specimens after stress relief annealing, it can be concluded that the increase of transition layer improves the tensile strength and plasticity of TC4/TC11 dual alloy, and that fractures occurs on the side of TC4 titanium alloy, which shows that the transition interface performance of TC4/TC11 dual alloy is good.