增材制造钛合金飞机结构维修件力学性能试验研究  

EXPERIMENTAL RESEARCH ON MECHANICAL PROPERTIES OF TITANIUM ALLOY AIRCRAFT STRUCTURE MAINTENANCE PARTS BY ADDITIVE MANUFACTURING

作　　者：刘世华 张宝才[2] 谢隋杰 程宗辉 张洁 李海澄 LIU ShiHua;ZHANG BaoCai;XIE SuiJie;CHENG ZongHui;ZHANG Jie;LI HaiCheng(Wuhu State-Owned Factory of Machining,Wuhu 241007,China;AVIC Shenyang Aircraft Design Research Institute,Shenyang 110035,China;School of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]国营芜湖机械厂,芜湖241007 [2]航空工业沈阳飞机设计研究所,沈阳110035 [3]南京航空航天大学航空学院,南京210016

出　　处：《机械强度》2023年第6期1340-1347,共8页Journal of Mechanical Strength

基　　金：国家重点研发计划(2018YFB1105800)项目资助。

摘　　要：通过对增材制造选区激光熔化的钛合金飞机结构维修件的相关性能试验研究,全面评价其工程应用的可行性。研究对照了增材制造与传统机械加工的钛合金材料与典型结构试样以及飞机结构维修件的力学性能,结果表明,增材制造钛合金材料室温拉伸、剪切、冲击性能均很优异,与钛合金板材相比各项力学性能相对误差均在10%以内;增材制造钛合金典型结构与机械切削加工典型结构相比,静强度相对误差均在5%以内,疲劳强度最大相对误差为12.9%,钛合金增材制造典型结构与机械加工典型结构力学性能处于同一水平;钛合金增材制造飞机结构维修件与高强度钢机械加工飞机结构维修件的补强效果相当甚至略优。研究表明,增材制造钛合金结构也能满足飞机维修工程的基本要求。In order to comprehensively evaluate the feasibility of the engineering application of titanium alloy,the comparative investigations on mechanical performances including the fatigue performance of both aircraft structural maintenance parts and material were carried out based on the different processing methods in which titanium alloy and typical structural samples were respectively made by the selective laser melting(SLM)and traditional mechanical process.As the results,the tensile,shear,and impact properties of titanium alloy by SLM method were excellent at room temperature,and the relative error of various mechanical properties is less than 10%when compared with titanium alloy plates by mechanical process.The aforementioned typical structural samples manufactured by SLM also have the strongest performance of mechanical processing,the relative error of static strength is less than 5%,and the maximum relative error of fatigue strength is 12.9%,titanium alloy typical structural parts manufactured by SLM also have the same level performance of mechanical processing.The reinforcement effect of titanium alloy aircraft structural maintenance parts manufactured by SLM is equivalent to or even slightly better than that of high strength steel by mechanical process.The research shows that the titanium alloy structure made by SLM also meets the basic installation requirement and use.

关 键 词：选区激光熔化 钛合金 飞机维修 静强度 疲劳性能 

分 类 号：V214.9[航空宇航科学与技术—航空宇航推进理论与工程]