| 高速冲击下2519A-T87铝合金微观组织研究 |
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| 引用本文： | 张清华,李伯龙,聂祚仁,陈希,陈春黾,尹嘉明.高速冲击下2519A-T87铝合金微观组织研究[J].科学技术与工程,2011,11(15):3413-3416. |
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| 作者姓名： | 张清华 李伯龙 聂祚仁 陈希 陈春黾 尹嘉明 |
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| 作者单位： | 北京工业大学材料科学与工程学院,北京,100124 |
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| 基金项目： | 高性能铝材与铝资源高效利用的基础研究。 |
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| 摘 要： | 用金相显微镜(OM)和透射电子显微镜(TEM)对2519A-T87铝合金靶材弹坑周围的高速冲击特征组织进行了观察分析。在OM下观察分析发现弹坑周围形成了变形带和绝热剪切带,裂纹在绝热剪切带内萌发和扩展。TEM下观察分析发现变形带内为微带组织,绝热剪切带内是动态再结晶组织。位错在微观组织演化过程中起到了重要作用。显微硬度测试结果表明,绝热剪切带的硬度值远远低于基体。
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| 关 键 词： | 高速冲击 微带 绝热剪切带 硬度 形成机制 |
| 收稿时间： | 2010/12/26 0:00:00 |
| 修稿时间： | 2010/12/27 0:00:00 |
Microstructure evolution of 2519A-T87 during projectile impact |
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| zhangqinghu,libolong,niezuoren,chenxi,chenchunmin and yinjiaming.Microstructure evolution of 2519A-T87 during projectile impact[J].Science Technology and Engineering,2011,11(15):3413-3416. |
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| Authors: | zhangqinghu libolong niezuoren chenxi chenchunmin and yinjiaming |
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| Institution: | Beijing University of Technology,Beijing University of Technology,Beijing University of Technology,Beijing University of Technology,Beijing University of Technology |
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| Abstract: | The characteristic microstructures around the crater in 2519A-T87 alloy impacted with projectile were investigated though optical microscopy (OM) and transmission electron microscopy (TEM). The deformation bands and adiabatic shear bands were found at the crater wall, and the micro-cracks have been germinated and developed followed by the adiabatic shear bands by OM. The micro-bands within the deformation bands and the dynamic recrystallization fine grains inside the adiabatic shear bands were observed by TEM. The results show that the dislocation plays a crucial role in the microstructure evolution. The microhardness in the adiabatic shear bands and matrix were measured, and the low microhardness in the adiabatic shear bands should be attributed to the thermal softening. |
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| Keywords: | Projectile impact Micro-bands Adiabatic shear bands Microhardness Mechanism |
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