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TC4纖維增強(qiáng)鋁復(fù)合材料的高速撞擊損傷行為
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中國(guó)博士后科學(xué)基金（20090460764）；華南理工大學(xué)自然科學(xué)青年基金項(xiàng)目


Damage Mechanism of (2D-Tif)/Al Composites Against Hypervelocity Impact
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    摘要:

    針對(duì)航天器空間碎片防護(hù)材料需求，采用二維編織的TC4纖維作為增強(qiáng)體制備了(2D-Tif)/Al復(fù)合材料，并采用二級(jí)輕氣炮研究了復(fù)合材料在高速粒子撞擊下的損傷行為及其組織演變規(guī)律。結(jié)果表明，(2D-Tif)/Al復(fù)合材料靶板的破壞以侵徹穿深為主，背面產(chǎn)生了帶裂紋的鼓包或發(fā)生略微崩落；其抗高速撞擊能力優(yōu)于等厚的LF6基體合金，平均吸能能力比基體合金提高了8.4 J。復(fù)合材料內(nèi)部的基體合金在高速粒子撞擊下被嚴(yán)重?cái)D壓變形，在遠(yuǎn)離彈坑部位，基體合金變形減輕，缺陷以微裂紋和微孔洞為主。高強(qiáng)韌Ti纖維的加入起到了承載和吸能作用，有效減緩了基體合金的變形，并抑制了基體合金中絕熱剪切帶的形成。

    Abstract:

    (2D-Tif)/Al composites reinforced with TC4 fibers fabric was fabricated by pressure infiltration method for the demand of debris protection of aircrafts. The impact resistance ability, macro-damage characteristic and microstructure evolution principle of the two types of composites were researched by two-stage light gas gun (at a velocity of 2.5 km/s). Results show that the failure characteristics of (2D-Tif)/Al composite targets are comprised of the penetration and the spalling on the back surfaces. The prospection capacity of the composites is twice higher than those of the LF6 alloy. Aluminum alloy matrix are squeezed and deformed seriously near the crater and micro-cracks as well as holes are dominated in the matrix. Analysis show that adiabatic shear band inner the alloy matrix is restrained obviously by the addition of TC4 fibers

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朱德智,陳維平,李元元,武高輝. TC4纖維增強(qiáng)鋁復(fù)合材料的高速撞擊損傷行為[J].稀有金屬材料與工程,2011,40(10):1804~1807.[Zhu Dezhi, Chen Weiping, Li Yuanyuan, Wu Gaohui. Damage Mechanism of (2D-Tif)/Al Composites Against Hypervelocity Impact[J]. Rare Metal Materials and Engineering,2011,40(10):1804~1807.]
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  • 收稿日期:2010-10-25
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