Microstructure and Properties of the Energetic Structural Material of Ti1.5ZrNbMo0.5W0.5 High-Entropy Alloy
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摘要: 随着人们对含能结构材料力学性能及释能效果的综合要求不断提高,传统含能结构材料难以同时满足高强度及高释能水平的需求。为此,通过粉末冶金工艺,制备了一种新型Ti1.5ZrNbMo0.5W0.5高熵合金,系统研究了该合金的微观组织、力学性能、毁伤效能及能量释放机制。结果表明,Ti1.5ZrNbMo0.5W0.5合金具有高致密度、较小的晶粒尺寸和优异的准静态及动态压缩性能。在弹道枪实验中,尺寸为$\varnothing $8 mm×8.5 mm的Ti1.5ZrNbMo0.5W0.5合金破片在637、861和
1126 m/s速度下,可分别击穿厚度为6、8和10 mm的Q235钢板,穿靶后破片破碎并发生剧烈的释能反应,释能过程以富Zr区域的显著氧化为主导,该过程释放大量热能,并可引燃棉花和汽油等靶后易燃物。研究结果揭示了Ti1.5ZrNbMo0.5W0.5高熵合金的释能机制,评价了其在实际穿甲应用场景下的综合毁伤效能,为该体系合金的进一步研究和应用提供了理论基础和实验依据。Abstract: With the increasing demand for enhanced mechanical properties and energy release capabilities in energetic structural materials, traditional materials struggle to concurrently achieve both high mechanical properties and energy release properties. In this study, a novel Ti1.5ZrNbMo0.5W0.5 high-entropy alloy was developed by powder metallurgy process, and its microstructure, mechanical properties, damage effectiveness and energy release mechanisms were comprehensively investigated. The results indicate that the sintered Ti1.5ZrNbMo0.5W0.5 alloy, characterized by high density and fine grain size, demonstrates superior quasi-static and dynamic compression properties. During the ballistic gun experiments, the Ti1.5ZrNbMo0.5W0.5 alloy fragment can penetrate the Q235 steel plate with thickness of 6, 8, and 10 mm at speeds of 637, 861, and1126 m/s, respectively. Meanwhile, after penetrating through the target, the fragment was broken into small-sized fragments and caused the severe energy release reaction. This energy release reaction is primarily driven by the substantial oxidation of Zr-rich regions, releasing significant thermal energy and successfully igniting the cotton and gasoline placed behind the steel target. This research provides a thorough characterization of the microstructure and mechanical properties of Ti1.5ZrNbMo0.5W0.5 alloy. Furthermore, it evaluates its overall performance in practical armor-piercing application and reveals its energy release mechanisms. The research results provide a theoretical foundation and experimental data for the further study and application of TiZrNbMoW system high-entropy alloy. -
表 1 实验用原料粉末参数
Table 1. Parameters of raw powders in this research
Raw material Purity/% Particle size/μm ZrH2 powder 99.99 5 Ti powder 99.95 10 Nb powder 99.95 10 W powder 99.95 5 Mo powder 99.95 5 表 2 Ti1.5ZrNbMo0.5W0.5合金的EDS点扫描结果
Table 2. EDS point scanning results of Ti1.5ZrNbMo0.5W0.5 alloy
Position Mass fraction/% Ti Zr Nb Mo W P1 18.44 3.78 22.20 24.73 30.85 P2 17.32 3.81 21.74 23.29 33.84 P3 23.04 7.72 26.54 27.65 15.05 P4 22.03 8.54 27.81 27.11 14.53 P5 27.70 51.93 13.01 6.63 0.73 P6 26.62 52.76 13.83 6.12 0.67 表 3 Ti1.5ZrNbMo0.5W0.5合金弹道枪实验数据
Table 3. Ballistic gun experiment data of Ti1.5ZrNbMo0.5W0.5 alloy
No. Thickness of the steel
target/mmFragment velocity/
(m·s–1)Penetration result of
the steel targetDiameter of penetration
hole/mmPost-effect
damage1 6 637 Penetration 10.08 Burn the cotton 2 6 854 Penetration 10.58 Burn the cotton 3 6 1082 Penetration 11.75 Burn the cotton 4 8 592 No penetration 5 8 861 Penetration 11.12 Burn the cotton 6 8 1007 Penetration 12.80 Burn the cotton 7 10 1126 Penetration 12.95 Burn the cotton 8 8 1035 Penetration 12.52 Burn the petrol 表 4 Ti1.5ZrNbMo0.5W0.5合金碎片的EDS扫描结果
Table 4. EDS point scanning results of Ti1.5ZrNbMo0.5W0.5 fragments after penetration
Number Element mass fraction/% O Ti Zr Nb Mo W P1 63.83 14.74 15.94 5.48 0 0 P2 61.47 14.18 18.43 5.73 0.02 0.17 P3 64.30 11.84 17.93 5.92 0 0 P4 25.71 0.28 0.96 22.09 40.40 10.56 P5 41.69 0.26 0.33 27.81 21.49 8.42 P6 41.49 4.37 2.33 19.51 20.72 11.58 -
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