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金属学报  2026, Vol. 62 Issue (4): 636-648    DOI: 10.11900/0412.1961.2025.00058
  研究论文 本期目录 | 过刊浏览 |
表层多孔Ti6Al4V/TiC梯度材料的构筑、组织和性能
邵星海1,2, 王文焱1,2(), 谢敬佩1, 秦文栋1, 王爱琴1, 马窦琴1, 毛志平1, 柳培1, 郭清远1
1.河南科技大学 材料科学与工程学院 洛阳 471003
2.河南科技大学 高温轻合金及应用技术全国重点实验室 洛阳 471003
Construction, Microstructure, and Properties of Ti6Al4V/TiC Functionally Graded Material with Porous Surface
SHAO Xinghai1,2, WANG Wenyan1,2(), XIE Jingpei1, QIN Wendong1, WANG Aiqin1, MA Douqin1, MAO Zhiping1, LIU Pei1, GUO Qingyuan1
1.School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, China
2.State Key Laboratory of Light Superalloys, Henan University of Science and Technology, Luoyang 471003, China
引用本文:

邵星海, 王文焱, 谢敬佩, 秦文栋, 王爱琴, 马窦琴, 毛志平, 柳培, 郭清远. 表层多孔Ti6Al4V/TiC梯度材料的构筑、组织和性能[J]. 金属学报, 2026, 62(4): 636-648.
Xinghai SHAO, Wenyan WANG, Jingpei XIE, Wendong QIN, Aiqin WANG, Douqin MA, Zhiping MAO, Pei LIU, Qingyuan GUO. Construction, Microstructure, and Properties of Ti6Al4V/TiC Functionally Graded Material with Porous Surface[J]. Acta Metall Sin, 2026, 62(4): 636-648.

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摘要: 

均质钛基复合材料因组织和性能单一而导致抗冲击性能不足,本工作旨在构筑一种兼具表层多孔和功能梯度特征的高吸能、高抗冲击钛基复合材料。通过ZrO2空心球占位法和热压烧结法制备了含表层多孔钛层和五个梯度层的Ti6Al4V/TiC梯度材料,多孔钛层孔隙率为40%,梯度层致密度不低于98.8%,梯度层由底层向多孔钛方向,TiC加入量0~8%递增,TiC粒径由3~5 μm增加至15~53 μm。研究了表层多孔Ti6Al4V/TiC梯度材料的显微组织和性能,结果表明,相邻梯度层的连接形式为冶金结合,基体由层片状α-Ti相和β-Ti相构成,TiC颗粒主要分布在原始β-Ti晶界位置,强化机制为细晶强化、位错强化和弥散强化;与Ti6Al4V层相比,加入TiC颗粒后,原始β-Ti晶粒及其内部的α-Ti相、β-Ti相得到明显细化,加入尺寸为15~53 μm、含量为8%的TiC颗粒后,该梯度层材料硬度最高;加入尺寸为3~5 μm、含量为4%和6%的TiC颗粒后,两个梯度层材料的抗拉强度和韧性均提升,其中前者韧性最好,后者抗拉强度最高;在压缩实验过程中,表面多孔钛层能在较低压缩载荷下持续坍塌变形,具有显著的吸能特性。表层多孔Ti6Al4V/TiC梯度材料通过高吸能表层多孔钛的削弱冲击作用、高硬度迎弹面的抗穿透作用和高强高韧背弹面的抗冲击作用,来实现防护性能提升。

关键词 Ti6Al4V多孔钛梯度材料抗冲击性能组织和性能    
Abstract

Homogeneous titanium matrix composites (TMCs), despite their unique microstructure and properties, often exhibit inadequate impact resistance. To overcome this limitation, this study presents a high-energy-absorbing and impact-resistant TMC by incorporating a dual design strategy: a porous surface layer and a functionally graded internal structure. A Ti6Al4V/TiC graded material, consisting of one porous titanium surface layer and five gradient layers, was fabricated using the ZrO2 hollow sphere placeholder method combined with hot pressing sintering. The porous titanium layer exhibited a porosity of 40%, while each of the five gradient layers achieved a relative density of 98.8%. Moving from the bottom layer towards the porous surface, the TiC content was systematically increased from 0 to 8%, and the TiC particle size was enlarged from 3-5 μm to 15-53 μm. The microstructure and properties of the fabricated material were comprehensively characterized. The gradient layers were metallurgically bonded, ensuring structural integrity. The matrix microstructure comprised lamellar α-Ti and β-Ti phases, with TiC particles predominantly distributed along prior β-Ti grain boundaries. The identified strengthening mechanisms included grain refinement, dislocation strengthening, and dispersion strengthening. Compared with the monolithic Ti6Al4V layer, the incorporation of TiC particles effectively refined the prior β-Ti grains along with the α-Ti and β-Ti phases. The gradient layer containing 8%TiC particles (15-53 μm) achieved the highest hardness. In contrast, the layers containing 4% and 6%TiC particles (3-5 μm) demonstrated enhanced tensile strength and toughness. Notably, the layer with 4%TiC showed superior toughness, while the layer with 6%TiC achieved the maximum tensile strength. Compression tests revealed that the porous titanium surface layer possessed remarkable energy absorption capacity, undergoing progressive collapse deformation under relatively low compressive loads before reaching densification. The Ti6Al4V/TiC functionally graded material with a porous surface effectively enhanced protective performance through a synergistic mechanism: the highly energy-absorbing porous surface mitigated initial impact forces, the high-hardness impact-facing layers provided superior penetration resistance, and the high-strength, high-toughness backing layers contributed to excellent residual load-bearing capacity and overall impact resistance.

Key wordsTi6Al4V    porous titanium    functionally graded material    impact resistance    structure and property
收稿日期: 2025-02-27     
ZTFLH:  TG146.2  
基金资助:河南省重点研发专项项目(241111231300)
通讯作者: 王文焱,wangwy1963@163.com,主要从事有色金属和加工技术研究
Corresponding author: WANG Wenyan, professor, Tel: 18538830415, E-mail: wangwy1963@163.com
作者简介: 邵星海,男,1988年生,高级工程师,博士生
Layer numberAbbreviation for layerMass fraction of powder added / %
Ti6Al4V3-5 μm TiC15-53 μm TiCZrO2 hollow ball
1Titanium100---
2Ti-4%TiC964--
3Ti-6%TiC946--
4Ti-8%TiC928--
5Ti-8%LTiC92-8-
6Porous titanium72.77--27.23
表1  表层多孔Ti6Al4V/TiC梯度复合材料的设计
图1  叠层铺粉示意图和模具实物图
图2  试样制备示意图
图3  Ti6Al4V、3~5 μm TiC及两者球磨混合粉末的SEM像和XRD谱
图4  Ti6Al4V/TiC梯度材料的OM像
图5  Ti6Al4V/TiC梯度材料界面附近的SEM像和EDS线扫描分析结果
图6  图5c中不同尺寸白色颗粒的SEM像和EDS分析结果
图7  六层材料的SEM像
图8  六层材料中原始β-Ti晶粒的平均直径和致密度
图9  钛层、Ti-8%TiC层和Ti-8%LTiC层的TEM分析
图10  表面多孔钛层和钛层的压缩载荷-时间曲线
图11  五层梯度材料及界面的硬度测试结果
图12  钛层、Ti-4%TiC层、Ti-6%TiC层和Ti-8%TiC层的抗拉强度和断后伸长率
图13  钛层、Ti-4%TiC层、Ti-6%TiC层和Ti-8%TiC层的单位体积吸收能-时间曲线和冲击力-时间曲线
图14  Ti6Al4V合金和表层多孔Ti6Al4V/TiC梯度材料的防护过程示意图
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