随着新一代航空航天飞行器向着高速化、大型化、结构复杂化以及提高燃油效率等方向的跨越式发展.要求钛合金结构材料具有高比强度、高比模量、高韧性、高损伤容限、低成本以及叮焊接等优良的综合性能匹配.此外,航天、兵器、船舶等武器装备各框梁类承力构件、承力螺栓等紧固件、高强度弹簧等弹性元件、航母弹射器与装甲等均对高强度钛合金、超高强度钛合金提出了明确需求.因此,超高强度钛合金成为了新一代武器装备发展的关键支撑材料之一,是钛合金开发和应用研究的重点方向,更是各国政府关注和重点发展的新型军用先进材料.介绍了国内外主要超高强度钛合金(TB8,TB-13,Ti-B19,Ti-B20,GUM,β21S和Timetal-LCB等)的发展和应用情况,指出了超高强度钛合金存在强度不断提高的同时,塑性、韧性、模量、疲劳性能以及损伤容限性能不同程度地降低,同时缺乏对合金化机制、强韧化理论和方法等基础问题的深入系统研究.最后提出了超高强度钛合金的发展方向.
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