Recent progress on impact induced reaction mechanism of reactive alloys

IF 5 Q1 ENGINEERING, MULTIDISCIPLINARY
Yansong Yang, Chuanting Wang, Yuanpei Meng, Yue Ma, Lei Guo, Yuan He, Zhichao Sun, Yong He
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Abstract

In recent years, in order to improve the destructive effectiveness of munitions, the use of new types of destructive elements is an important way to improve destructive effectiveness. As a new type of reactive material, reactive alloy contains a large portion of reactive metal elements (Al, Mg, Ti, Zr, etc.), which breaks up under high-velocity impact conditions, generating a large number of high-temperature combustible fragments, which undergo a violent combustion reaction with air. Compared with traditional metal polymers (Al-PTFE) and other reactive composites, it has higher density and strength, excellent mechanical properties and broader application prospects. Currently, researchers have mainly investigated the impact energy release mechanism of reactive alloys through impact tests, and found that there are several important stages in the process of the material from fragmentation to reaction, i.e., impact fragmentation of the material, rapid heating and combustion reaction. This paper focuses on three problems that need to be solved in the impact-induced energy release process of reactive alloys, namely: the fragmentation mechanism and size distribution law of the fragments produced by the impact of the material on the target, the relationship between the transient temperatures and the size of the fragments, and the reaction temperatures and size thresholds of the fragments to undergo the chemical reaction. The current status of the research of the above problems is reviewed, some potential directions to reveal the impact induced reaction mechanism of reactive alloy is discussed.

活性合金冲击诱导反应机理研究的最新进展
近年来,为了提高弹药的毁伤效能,使用新型毁伤元素是提高毁伤效能的重要途径。活性合金作为一种新型活性材料,含有大量活性金属元素(Al、Mg、Ti、Zr 等),在高速撞击条件下破裂,产生大量高温可燃碎片,与空气发生剧烈燃烧反应。与传统金属聚合物(Al-PTFE)和其他反应复合材料相比,它具有更高的密度和强度,机械性能优异,应用前景更为广阔。目前,研究人员主要通过冲击试验研究活性合金的冲击能量释放机理,发现材料从破碎到反应的过程存在几个重要阶段,即材料的冲击破碎、快速加热和燃烧反应。本文重点讨论了反应合金冲击诱导能量释放过程中需要解决的三个问题,即:材料冲击靶材产生的碎片的破碎机理和尺寸分布规律、瞬态温度与碎片尺寸的关系、碎片发生化学反应的反应温度和尺寸阈值。综述了上述问题的研究现状,讨论了揭示反应合金冲击诱导反应机理的一些潜在方向。
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来源期刊
Defence Technology(防务技术)
Defence Technology(防务技术) Mechanical Engineering, Control and Systems Engineering, Industrial and Manufacturing Engineering
CiteScore
8.70
自引率
0.00%
发文量
728
审稿时长
25 days
期刊介绍: Defence Technology, a peer reviewed journal, is published monthly and aims to become the best international academic exchange platform for the research related to defence technology. It publishes original research papers having direct bearing on defence, with a balanced coverage on analytical, experimental, numerical simulation and applied investigations. It covers various disciplines of science, technology and engineering.
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