| 材料裂纹型损伤愈合过程观测 |
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| 引用本文： | 徐永东%张文兴%柴东朗.材料裂纹型损伤愈合过程观测[J].宇航材料工艺,2001,31(3):37-41. |
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| 作者姓名： | 徐永东%张文兴%柴东朗 |
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| 作者单位： | 1. 兵器工业第五二研究所宁波分所
2. 西安交通大学材料科学与工程学院 |
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| 摘 要： | 对预制裂纹型损伤的愈合过程进行了实时原位观察，结果发现裂纹愈合过程分为裂尖钝化、裂纹分节、裂腔球化、孔洞愈合及质量均匀化等几个明显阶段。所得结果与金相法得到的纯铁的裂纹愈合过程相符，通过建立相关裂纹愈合模型分析认为裂纹愈合过程必须满足一定的热动力学条件，空位迁移是裂纹愈合的主要机制。
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| 关 键 词： | 愈合 原位观察 热动力学 空位迁移 材料损伤 纯铁 裂纹型损伤 |
Observation of Material Crack Healing Process |
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| Xu Yongdong.Observation of Material Crack Healing Process[J].Aerospace Materials & Technology,2001,31(3):37-41. |
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| Authors: | Xu Yongdong |
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| Affiliation: | Xu Yongdong ( No.52 Research Institute of China Ordnance Industries Ningbo 315041 ) Zhang Wenxing Chai Donglang ( Xi'an Jiaotong University Xi'an 710049 ) |
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| Abstract: | In this paper full process of crack healing is in situ observed for the first time.It is found that there are several obvious stages in the process of crack healing,including crack tip blunting,crack disintegration, crack sphericizing to void,void healing and well distributing.Thermodynamic conditions of damage healing are analyzed and it is proved that the void diffusing is a main mechanism during the crack healing process,which is in accord with the crack healing process of pure iron by metallographic examination. |
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| Keywords: | Crack Healing In situ Thermodynamic Void diffusing |
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