摘要
针对航天器空间碎片防护材料需求,采用二维编织的TC4纤维作为增强体制备了(2D-Tif)/Al复合材料,并采用二级轻气炮研究了复合材料在高速粒子撞击下的损伤行为及其组织演变规律。结果表明,(2D-Tif)/Al复合材料靶板的破坏以侵彻穿深为主,背面产生了带裂纹的鼓包或发生略微崩落;其抗高速撞击能力优于等厚的LF6基体合金,平均吸能能力比基体合金提高了8.4J。复合材料内部的基体合金在高速粒子撞击下被严重挤压变形,在远离弹坑部位,基体合金变形减轻,缺陷以微裂纹和微孔洞为主。高强韧Ti纤维的加入起到了承载和吸能作用,有效减缓了基体合金的变形,并抑制了基体合金中绝热剪切带的形成。
（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.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2011年第10期1804-1807,共4页
Rare Metal Materials and Engineering
基金
中国博士后科学基金(20090460764)
华南理工大学自然科学青年基金项目
关键词
铝基复合材料
TC4纤维
高速撞击
微观组织
aluminum matrix composites
TC4 fiber
hypervelocity impact
microstructure
