TiN/Ti多层涂层高速冲击损伤特征研究  

Damage characteristics of TiN/Ti multilayer coatings with high speed impact

作　　者：韩玉涛 袁战伟[1] 臧顺来[2] 何光宇[3] 柴艳[3] 杨竹芳[3] HAN Yutao;YUAN Zhanwei;ZANG Shunlai;HE Guangyu;CHAI Yan;YANG Zhufang(School of Materials Science and Engineering,Chang'an University,Xi'an 710064,China;School of Mechanical Engineering,Xi'an Jiaotong University,Xi'an 710049,China;Science and Technology on Plasma Dynamics Laboratory,Air Force Engineering University,Xi'an 710038,China)

机构地区：[1]长安大学材料科学与工程学院,陕西西安710064 [2]西安交通大学机械工程学院,陕西西安710049 [3]空军工程大学等离子体动力学重点实验室,陕西西安710038

出　　处：《兵器材料科学与工程》2020年第3期23-28,共6页Ordnance Material Science and Engineering

基　　金：国家科技重大专项(2017-VII-0012-0107);长安大学中央高校基本科研业务费专项资金(300102319101)。

摘　　要：为研究砂粒高速冲蚀TiN/Ti多层涂层的损伤特征,采用有限元方法模拟砂粒冲蚀TiN/Ti多层涂层过程,研究单颗粒高速冲击下涂层总厚度、调制比、冲击角度对TiN/Ti涂层损伤特征的影响。结果表明:砂粒冲击涂层过程中,冲击中心正下方的各TiN层下表面和冲击接触半径附近的各TiN层上表面均分布较大的拉应力,在冲击中心正下方各TiN层上表面主要分布较大的压应力;涂层内的最大拉应力和基体最大等效塑性应变随着涂层总厚度的增大先增大后减小,厚度最大时体现出良好的抗冲击性;增大多层涂层的调制比会造成涂层内的最大拉应力以及基体的最大等效塑性应变不断增大;砂粒冲击角度从小角度到大角度的过程中,涂层内的最大应力和基体最大等效塑性应变不断增大,冲击角度为90°时,TiN/Ti多层涂层的梯度作用不明显。In order to study the damage characteristics of high-speed erosion of TiN/Ti multilayer coatings by sand particles,the finite element method was used to simulate the erosion of TiN/Ti multilayer coatings by sand particles. The effects of the total coating thickness,modulation ratio,and impact angle on the damage characteristics of TiN/Ti coatings under single-particle high-speed impact were studied. The results show that during the sand impacts coating,a large tensile stress is distributed on the lower surface of each TiN layer directly below the impact center and the upper surface of each TiN layer near the impact contact radius. Large compressive stress is mainly distributed on the upper surface of each TiN layer directly below the impact center.The maximum tensile stress in the coating and the maximum equivalent plastic strain of the substrate increase first and then decrease as the total thickness of the coating increases. The coating exhibits good impact resistance at the maximum thickness.Increasing the modulation ratio of the multilayer coating will cause the maximum tensile stress in the coating and the maximum equivalent plastic strain of the substrate to increase continuously. When the impact angle of the sand particles increases from a small angle to a large angle,the maximum stress in the coating and the maximum equivalent plastic strain of the substrate continue to increase. When the impact angle is 90°,the gradient effect of TiN/Ti multilayer coating becomes less obvious.

关 键 词：TiN/Ti多层涂层 拉应力 等效塑性应变 

分 类 号：V260.1[航空宇航科学与技术—航空宇航制造工程]