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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
引用本文: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,2019,47(3):910-915.
作者姓名:何波  刘杰  杨光
作者单位:沈阳航空航天大学机电工程学院;沈阳航空航天大学航空制造工艺数字化国防重点学科实验室
基金项目:辽宁省自然科学基金资助(201302411)
摘    要:通过激光沉积制造技术制备了不同过渡层数的TC4/TC11双合金试样,研究不同过渡层数和不同热处理制度对TC4/TC11双合金连接界面的显微组织、拉伸性能和显微硬度的影响。结果表明,过渡层数对组织的形貌影响较大,过渡层数的增加,减少了TC4/TC11双合金试样连接界面的差异,使显微硬度分布均匀;沉积态TC4/TC11双合金过渡处网篮组织差异大,去应力退火后的组织均匀,经固溶时效处理后组织粗大且差异明显;对去应力退火后的试样进行了室温拉伸,随着过渡层数的增多,TC4/TC11双合金试样抗拉强度升高,塑性增强,断口均断在TC4钛合金一侧,证明了TC4/TC11双合金过渡界面性能良好。

关 键 词:激光沉积制造  钛合金  显微组织  性能  梯度材料  
收稿时间:2017/7/31 0:00:00
修稿时间:2017/9/21 0:00:00

Effect of transition layers on Microstructure and properties of TC4/TC11 interface fabricated by laser deposition
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.
Authors:He Bo  Liu Jie and Yang Guang
Institution:School of Mechatronics Engineering,Shenyang Aerospace University,School of Mechatronics Engineering,Shenyang Aerospace University,Key Laboratory of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University
Abstract: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.
Keywords:laser deposition manufacturing  titanium alloy  microstructure  properties  gradient materials  
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