以不同粒度的TC4合金粉末为基体材料,以VC作为碳源,采用高通量热压烧结工艺,原位制备具有不同网状结构尺寸和不同TiC体积分数(分别为2%、4%和6%)的TiC/TC4钛基复合材料,研究TiC含量和TC4粉末粒度对复合材料组织与性能的影响。结果表明,TiC/TC4复合材料中的TiC增强颗粒呈网状分布。与TC4合金相比,TiC/TC4复合材料的组织明显细化。随TiC含量增加,TiC网状结构的厚度增大,材料的抗拉强度与伸长率先升高后下降,TiC含量为2%的复合材料综合性能最优。随TC4粉末粒度减小,TiC/TC4复合材料中的基体组织逐渐细化,基体的连通性提高,材料抗拉强度与伸长率同时提高。采用粒度为40~80 μm的TC4合金粉末为原料制备的2%TiC/TC4复合材料,网状结构尺寸小,综合性能最优,屈服强度、抗拉强度和伸长率分别为946 MPa、1058 MPa和18.1%,较TC4合金分别提高29.6%、31.6%和118.1%。
Using TC4 alloy powders with different particle sizes as the matrix material, using VC as the carbon source, using high throughput hot press sintering process, TiC/TC4 composites were prepared with different network structure sizes and TiC volume fractions (2%, 4%, 6%). The effect of TiC content and TC4 powder particle sizes on the microstructure and properties of composite materials were studied. The results show that the TiC reinforcement particles in TiC/TC4 titanium matrix composites are distributed in a network. Compared with TC4 alloy, the microstructure of TiC/TC4 composite materials are significantly refined. As the TiC content increases, the thickness of the TiC network layer increases, and the tensile strength and elongation of the material first increase and then decrease. The material with 2%TiC has the best overall performance. As the particle size of TC4 decreases, the microstructure of the TiC/TC4 composite is gradually refined, the connectivity of the matrix increases, and the tensile strength and elongation of the material increase at the same time. 2%TiC/TC4 composite material prepared by TC4 alloy powders with a particle size of 40-80 μm has a small network structure and the best overall performance. The yield strength, tensile strength and elongation reach 946 MPa, 1058 MPa and 18.1%, respectively, which are 29.6%, 31.6%, and 118.1% higher than TC4 alloy.
[1] LI J, CUI X, HOOPER G J, et al.Rational design, bio-functionalization and biological performance of hybrid additive manufactured titanium implants for orthopaedic applications: A review[J]. Journal of the Mechanical Behavior of Biomedical Materials, 2020, 105: 103671.
[2] ZHANG X, CHEN Y, HU J.Recent advances in the development of aerospace materials[J]. Progress in Aerospace Sciences, 2018, 97: 22-34.
[3] MOLAEI R, FATEMI A, SANAEI N, et al.Fatigue of additive manufactured Ti-6Al-4V. Part II: The relationship between microstructure, material cyclic properties, and component performance[J]. International Journal of Fatigue, 2020, 132. 105363.
[4] HAYAT M D, SINGH H, HE Z, et al.Titanium metal matrix composites: An overview[J]. Composites Part A: applied Science and Manufacturing, 2019, 121: 418-438.
[5] HUANG L J, GENG L, LI A B, et al.In situ TiBw/Ti-6Al-4V composites with novel reinforcement architecture fabricated by reaction hot pressing[J]. Scripta Materialia, 2009, 60(11): 996-999.
[6] PAN Y, LI W, LU X, et al.Microstructure and tribological properties of titanium matrix composites reinforced with in situ synthesized TiC particles[J]. Materials Characterization, 2020, 170: 110633.
[7] WEI W H, SHAO Z N, SHEN J, et al.Microstructure and mechanical properties of in situ formed TiC-reinforced Ti-6Al-4V matrix composites[J]. Materials Science and Technology, 2017, 34(2): 191-198.
[8] ZHANG C, GUO Z, YANG F, et al.In situ formation of low interstitials Ti-TiC composites by gas-solid reaction[J]. Journal of Alloys and Compounds, 2018, 769: 37-44.
[9] LIU Y B, LIU Y, TANG H P, et al.Reactive sintering mechanism of Ti+Mo2C and Ti+VC powder compacts[J]. Journal of Materials Science, 2010, 46(4): 902-909.
[10] LIU L, LI Y, ZHANG H, et al.Simultaneously enhancing strength and ductility in graphene nanoplatelets reinforced titanium (GNPs/Ti) composites through a novel three- dimensional interface design[J]. Composites B: Engineering, 2021, 216: 108851.
[11] SRIBALAJI M, MUKHERJEE B, BAKSHI S R, et al.In-situ formed graphene nanoribbon induced toughening and thermal shock resistance of spark plasma sintered carbon nanotube reinforced titanium carbide composite[J]. Composites B: Engineering, 2017, 123: 227-240.
[12] ZHANG F, LIU T.Nanodiamonds reinforced titanium matrix nanocomposites with network architecture[J]. Composites B: Engineering, 2019, 165: 143-154.
[13] HUANG L J, GENG L, XU H Y, et al.In situ TiC particles reinforced Ti6Al4V matrix composite with a network reinforcement architecture[J]. Materials Science and Engineering A, 2011, 528(6): 2859-2862.
[14] ZHANG B, ZHANG F, SABA F, et al.Graphene-TiC hybrid reinforced titanium matrix composites with 3D network architecture: fabrication, microstructure and mechanical properties[J]. Journal of Alloys and Compounds, 2021, 859: 157777.
[15] LU J, DONG L, LIU Y, et al.Simultaneously enhancing the strength and ductility in titanium matrix composites via discontinuous network structure[J]. Composites A: Applied Science and Manufacturing, 2020, 136: 105971.
[16] 黄陆军, 安琦, 张芮. 一种热压烧结粉末冶金高通量制备金属基复合材料的方法: 201711340975.9[P].2018-03-30.
HUANG Lujun, AN Qi, ZHANG Rui. A kind of high throughput preparation methed of metal matrix composites via hot pressing sintering powder metallurgy: 201711340975.9[P].2018- 03-30.
[17] 刘腾飞. 网状结构纳米金刚石/钛基复合材料的制备与性能[D]. 南京: 东南大学, 2019: 43-79.
LIU Tengfei.Fabrication and properties of nanocomposites with network architecture[D]. Nanjing: Southeast University, 2019. 43-79.
[18] WANG J, GUO X, QIN J, et al.Microstructure and mechanical properties of investment casted titanium matrix composites with B4C additions[J]. Materials Science and Engineering A, 2015, 628: 366-373.
[19] 张翥, 王群骄, 莫畏, 等. 钛的金属学与热处理[M]. 北京: 冶金工业出版社, 2009: 7.
ZHAGN Zhu, WANG Qunjiao, MO Wei, et al.Metalology and Heat Treatment of Titanium[M]. Beijing: Metallurgical Industry Press, 2009: 7.
[20] GUO X L, WANG L Q, WANG M M, et al.Effects of degree of deformation on the microstructure, mechanical properties and texture of hybrid-reinforced titanium matrix composites[J]. Acta Materialia, 2012, 60(6/7): 2656-2667.
