| 高体积分数TiB2/Al复合材料的动态压缩性能 |
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| 引用本文： | 武高辉,朱德智,陈国钦,姜龙涛. 高体积分数TiB2/Al复合材料的动态压缩性能[J]. 稀有金属材料与工程, 2010, 39(2): 262-267 |
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| 作者姓名： | 武高辉 朱德智 陈国钦 姜龙涛 |
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| 作者单位： | 1. 哈尔滨工业大学,黑龙江,哈尔滨,150001
2. 哈尔滨工业大学,黑龙江,哈尔滨,150001;华南理工大学,广东,广州,510640 |
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| 摘 要： | 采用分离式霍普金森压杆(SHPB)研究高体积分数TiB2/Al复合材料(55%-65%)的动态压缩性能,并对其在高应变率下的损伤机制进行分析。结果表明,相比应变率不敏感的基体合金,高体积分数TiB2/Al复合材料表现出明显的应变率敏感性;且随着体积分数的增加,其应变率敏感系数和流动应力值表现出先升后降趋势。在高应变率冲击下,复合材料表现为脆性断裂,增强相含量越高复合材料越易剪切破坏。复合材料断面局部呈现熔融铝团,直径为50～200μm,这与绝热温升效应有关。绝热温升使得基体合金软化,有效缓解高体积分数复合材料的瞬态失稳破坏。
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| 关 键 词： | 金属基复合材料 霍普金森压杆（SHPB） 高应变率压缩 应变率敏感性 |
| 收稿时间： | 2009-02-20 |
Dynamic Compression Properties of TiB2/Al Composites |
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| Wu Gaohui,Zhu Dezhi,Chen Guoqin and Jiang Longtao. Dynamic Compression Properties of TiB2/Al Composites[J]. Rare Metal Materials and Engineering, 2010, 39(2): 262-267 |
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| Authors: | Wu Gaohui Zhu Dezhi Chen Guoqin Jiang Longtao |
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| Affiliation: | 1.Harbin Institute of Technology;Harbin 150001;China;2.South China University of Technology;Guangzhou 510640;China |
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| Abstract: | Dynamic compression properties and adiabatic shear behavior of TiB2/Al composites(55%-65%,volume fraction) were investigated by split Hopkinson pressure bar(SHPB).The instantaneous failure of the composite was ascribed to the formation of adiabatic shear band when compressed.It is found that the composites tend to adiabatic shear failure as the reinforcement content increases.The flow stress and strain rate sensitivity exhibit rise/fall tendency with the increasing of strain rates.Additionally,the plastic d... |
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| Keywords: | metal matrix composites split Hopkinson pressure bar (SHPB) high strain-rate compression strain rate sensitivity |
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