Ti6Al4V/B4C titanium matrix composites with different B4C contents were prepared by vacuum arc melting. The microstructure and mechanical properties were characterized and analyzed by optical microscope, scanning electron microscope, microhardness tester, static compression and tensile test. The results show that in the process of arc melting, B4C reacts with titanium matrix in situ to form TiB, TIC and TiB2 phases. TiB presents one-dimensional long whisker shape, TiC presents granular shape, and massive TiB2 is formed when the content of B4C is 10 wt.%, and a special hollow prismatic Ti (BxCy) polymer may be formed. TiB2 produced by in-situ reaction significantly improve the microhardness of titanium matrix composites. When the content of B4C is 0.5 wt.%, the continuous network and evenly distributed structure of TiB and TiC produced by the in-situ reaction of titanium matrix composites has the best mechanical properties. The maximum compressive strength of the sample reaches 1 990 MPa and the maximum compressive strain is 35.5%. The compressive property exceeds that of molten titanium alloy. The tensile strength reaches 1 034 MPa, which is nearly 24% higher than that of molten titanium alloy, but the plasticity decreases. With the increase of B4C content, the tensile strength decreases gradually, titanium matrix composites gradually change from ductile fracture to brittle fracture.
GUO Shun
,
WANG Pengkun
,
GU Jieren
,
PENG Yong
,
XU Junqiang
,
ZHOU Qi
. Microstructure and mechanical properties of Ti6Al4V/B4C composite prepared by arc melting[J]. Transactions of The China Welding Institution, 2022
, 43(9)
: 62
-68
.
DOI: 10.12073/j.hjxb.20220403002
[1] 朱强, 赵文涛, 雷玉成, 等. Ti 对 SiCp/6092 铝基复合材料激光焊焊缝组织和性能的影响[J]. 焊接学报, 2021, 42(3): 85 - 90
Zhu Qiang, Zhao Wentao, Lei Yucheng, et al. Effect of Ti on microstructure and properties of laser welding weld of SiC particle reinforced 6092 Al alloy matrix composite[J]. Transactions of the China Welding Institution, 2021, 42(3): 85 - 90
[2] 李鹏, 廉润康, 马超群, 等. 加工道次对 FSP 制备高熵合金增强铝基复合材料组织和性能的影响[J]. 焊接学报, 2022, 43(6): 11 - 19
Li Peng, Lian Runkang, Ma Chaoqun, et al. Effect of processing pass on the microstructure and properties of high entropy alloy reinforced aluminum matrix composites via FSP[J]. Transactions of the China Welding Institution, 2022, 43(6): 11 - 19
[3] Xiong Y, Du M, Zhang F, et al. Preparation and mechanical properties of titanium alloy matrix composites reinforced by Ti3AlC and TiC ceramic particulates[J]. Journal of Alloys and Compounds, 2021, 886: 161216.
[4] Wang J, Zhao Y, Zhou W, et al. In-situ study on tensile deformation and damage evolution of metastable β titanium alloy with lamellar microstructure[J]. Materials Science and Engineering: A, 2021, 824: 141790.
[5] 王亮亮, 樊少忠, 付永红, 等. 铁基表面碳化钛致密陶瓷层的组织性能与增韧机制[J]. 焊接学报, 2018, 39(5): 121 - 124
Wang Liangliang, Fan Shaozhong, Fu Yonghong, et al. In situ TiC dense particles layer tissue properties and toughening mechanism on gray cast iron surface[J]. Transactions of the China Welding Institution, 2018, 39(5): 121 - 124
[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] Wang D, Li H, Zheng W. Oxidation behaviors of TA15 titanium alloy and TiBw reinforced TA15 matrix composites prepared by spark plasma sintering[J]. Journal of Materials Science & Technology, 2020, 37: 46 - 54.
[8] Tijo D, Masanta M. Effect of Ti/B4C ratio on the microstructure and mechanical characteristics of TIG cladded TiC-TiB2 coating on Ti6Al4V alloy[J]. Journal of Materials Processing Technology, 2019, 266: 184 - 197.
[9] 卢海滨, 杨文超, 湛永钟, 等. 原位合成TiBw/Ti-10MO新型低弹高强钛基复合材料[J]. 低碳世界, 2019, 9(3): 288 - 289
Lu Haibin, Yang Wenchao, Zhan Yongzhong, et al. In-situ synthesis of TiBw/Ti-10MO new low-elasticity high-strength titanium matrix composite[J]. Low Carbon World, 2019, 9(3): 288 - 289
[10] Geng K, Lu W, Yang Z, et al. In situ preparation of titanium matrix composites reinforced by TiB and Nd2O3[J]. Materials Letters, 2003, 57(24-25): 4054 - 4057.
[11] Li S, Han Y, Shi Z, et al. Synergistic strengthening behavior and microstructural optimization of hybrid reinforced titanium matrix composites during thermomechanical processing[J]. Materials Characterization, 2020, 168: 110527.
[12] Han C, Babicheva R, Chua J D Q, et al. Microstructure and mechanical properties of (TiB + TiC)/Ti composites fabricated in situ via selective laser melting of Ti and B4C powders[J]. Additive Manufacturing, 2020, 36: 101466.
[13] Koo M Y, Park J S, Park M K, et al. Effect of aspect ratios of in situ formed TiB whiskers on the mechanical properties of TiBw/Ti6Al4V composites[J]. Scripta Materialia, 2012, 66(7): 487 - 490.
[14] 黄陆军, 耿林, 彭华新. 钛合金与钛基复合材料第二相强韧化[J]. 中国材料进展, 2019, 38(3): 214 - 222
Huang Lujun, Geng Lin, Peng Huaxin. Strengthening and toughening mechanisms of the second phase in titanium alloys and titanium matrix composites[J]. Materials China, 2019, 38(3): 214 - 222
[15] 吕维洁, 郭相龙, 王立强, 等. 原位自生非连续增强钛基复合材料的研究进展[J]. 航空材料学报, 2014, 34(4): 139 - 146
Lü Weijie, Guo Xianglong, Wang Liqiang, et al. Progress on in-situ discontinuously reinforced titanium matrix composites[J]. Journal of Aeronautical Materials, 2014, 34(4): 139 - 146
[16] Tang M, Zhang L, Zhang N. Microstructural evolution, mechanical and tribological properties of TiC/Ti6Al4V composites with unique microstructure prepared by SLM[J]. Materials Science and Engineering: A, 2021, 814: 141187.
