感应熔覆原位自生TiC增强钛基复合涂层的纳米力学性能  

Nanomechanical properties of induction cladded in-situ TiC reinforced titanium matrix composite coatings

作　　者：张粲东 于鹤龙 王红美 尹艳丽 舒林森[1] 张伟 徐滨士[2] ZHANG Candong;YU Helong;WANG Hongmei;YIN Yanli;SHU Linsen;ZHANG Wei;XU Binshi(School of Mechanical Engineering,Shaanxi University of Technology,Hanzhong 723000,Shaanxi,China;National Key Laboratory for Remanufacturing,Army Academy of Armored Forces,Beijing 100072,China;Institute of Remanufacturing Industry Technology,Jing-Jin-Ji,Cangzhou 062450,Hebei,China)

机构地区：[1]陕西理工大学机械工程学院,陕西汉中723000 [2]陆军装甲兵学院装备再制造技术国防科技重点实验室,北京100072 [3]京津冀再制造产业技术研究院,河北沧州062450

出　　处：《材料工程》2023年第7期188-196,共9页Journal of Materials Engineering

基　　金：国家自然科学基金面上项目(52075544)。

摘　　要：为揭示感应熔覆原位TiC/Ti复合涂层微观结构与力学性能的对应关系,利用单一纳米压痕测试方法研究涂层内不同相结构的纳米力学性能变化规律,利用点阵压痕测试方法研究涂层微区结构的力学性能。单一压痕结果显示原位TiC增强相的纳米压痕硬度和弹性模量分别为21.3 GPa和275 GPa,富α-Ti与富β-Ti区域的基质相平均纳米硬度分别为4 GPa和6 GPa,平均弹性模量分别为130 GPa和155 GPa。点阵压痕与单一压痕测试结果之间具有较好的对应关系,对点阵纳米压痕测试结果进行三峰高斯拟合得到的最小峰值代表了涂层基质相的力学性能,中间峰值反映涂层的综合力学性能,最大峰值因受增强体尺寸与压痕位置的影响低于原位TiC增强体的真实力学性能。在考虑涂层微观结构与增强体尺寸的情况下,通过合理设置点阵压痕测试条件,选择适当的测试区域,可以在获得原位钛基复合涂层不同相结构真实力学性能的同时,揭示涂层的综合性能。In order to reveal the correspondence between the microstructure and mechanical properties of in-situ TiC/Ti composite coatings by induction fusion coating,the nano-mechanical property variation patterns of different phase structures within the coatings were investigated by using the isolated nanoindentation test method,and the mechanical properties of the coating micro-zone structure were studied by using grid indentation test method.The isolated indentation results show that the nanoindentation hardness and elastic modulus of the in-situ TiC-reinforced phases are 21.3 GPa and 275 GPa,respectively,while the average nano hardness of the matrix phase in theα-Ti-rich andβ-Ti-rich regions is 4 GPa and 6 GPa,respectively,and the average elastic modulus is 130 GPa and 155 GPa,respectively.The correspondence between the grid indentation and isolated indentation test results is good.The minimum peak obtained from the three-peak Gaussian fitting of the fractional nanoindentation test results represents the mechanical properties of the matrix phase of the coating,the middle peak reflects the comprehensive mechanical properties of the coating,and the maximum peak is lower than the real mechanical properties of the in-situ TiC reinforcement due to the influence of the reinforcement size and indentation position.Under the consideration of coating microstructure and reinforcement size,by reasonably setting the fractional indentation test conditions and selecting the appropriate test area,it can reveal comprehensive properties of the coating while obtaining real mechanical properties of different phase structures of in-situ TiC composite coatings.

关 键 词：感应熔覆 原位合成 钛基复合涂层 纳米压痕 

分 类 号：TG174.44[金属学及工艺—金属表面处理]