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| 不同卸载应力对层状TiAl基合金损伤程度的影响 | |
| 引用本文： | 朱浩,曹睿,张继,陈剑虹. 不同卸载应力对层状TiAl基合金损伤程度的影响[J]. 稀有金属, 2006, 30(3): 313-318 |
| 作者姓名： | 朱浩 曹睿 张继 陈剑虹 |
| 作者单位： | 1. 兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃,兰州,730050 2. 兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃,兰州,730050;兰州理工大学有色金属合金省部共建教育部重点实验室,甘肃,兰肃,730050 3. 钢铁研究总院高温材料研究所,北京,100081 |
| 摘 要： | 通过对层状TiAl基合金进行拉伸卸载试验，研究了不同预损伤对层状TiAl基合金断裂行为的影响。试验结果表明：随着损伤程度增加到一定程度，材料的弹性模量减小；随着预损伤程度的增加，裂纹面密度增大。通过统计分析发现裂纹面密度可以作为衡量损伤程度的损伤参量；但随着预损伤程度的增加，单位面积断裂功基本不变，进一步说明不同预损伤对层状TiAl基合金的最终断裂性能没有影响。 |
| 关 键 词： | 层状TiAl基合金 拉伸卸载 预损伤 裂纹面密度 单位面积断裂功 |
| 文章编号： | 0258-7076（2006）03-0313-06 |
| 收稿时间： | 2005-05-08 |
| 修稿时间： | 2005-05-082005-06-07 |
Effect of Different Pre-Damage on Fracture Behavior of Lamellar Titanium Aluminum Alloys |
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| Zhu Hao,Cao Rui,Zhang Ji,Chen Jianhong. Effect of Different Pre-Damage on Fracture Behavior of Lamellar Titanium Aluminum Alloys[J]. Chinese Journal of Rare Metals, 2006, 30(3): 313-318 | |
| Authors: | Zhu Hao Cao Rui Zhang Ji Chen Jianhong |
| Affiliation: | 1. State Key Laboratory of Gansu Advanced Non-Ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China ; 2. Key Laboratory of Non-Ferrous Metal Alloys, Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China ; 3. High Temperature Material Research Division, Central Iron and Steel Research Institute, Beijing 100081, China |
| Abstract: | The effect of different pre-damage on fracture behavior of lamellar TiA1 alloys by means of tensile tests at various unloading loads was studied. The results show that the elastic module decreases with damage increasing to some degree. The surface density of cracks increases with the increasing of the degreeof pre-damage. The surface density of cracks is regarded as damage parameter by statistical analysis. However, the fracture energy per unit area remains as constant, which means that different pre-damage has no effect on the final fracture properties of lamellar titanium aluminum alloys. |
| Keywords: | lamellar titanium aluminum alloys tension-unloading pre-damage surface density of cracks fracture energypre unit areas |
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