| 组织类型对钛合金损伤容限性能的影响及电镜原位观察 |
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| 引用本文： | 张旺峰,李兴无,马济民,曹春晓,朱知寿.组织类型对钛合金损伤容限性能的影响及电镜原位观察[J].航空材料学报,2006,26(3):313-314. |
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| 作者姓名： | 张旺峰 李兴无 马济民 曹春晓 朱知寿 |
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| 作者单位： | 北京航空材料研究院,北京,100095 |
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| 摘 要： | 采用扫描电镜(SEM)原位拉伸、原位疲劳方法研究TA15钛合金三种类型组织的裂纹尖端形状和疲劳裂纹扩展速率及扩展过程,并与宏观力学性能对比.结果表明,片状组织由于裂尖钝化、裂纹扩展路径曲折及分枝,损伤容限性能比等轴、双态组织好,即断裂韧性最高,疲劳裂纹扩展速率最低.
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| 关 键 词： | 钛合金 断裂韧性 裂纹扩展速率 原位观察 |
| 文章编号： | 1005-5053(2006)03-0313-02 |
| 修稿时间： | 2006年2月9日 |
Effect of Microstructure on Damage Tolerance Properties and SEM in-situ Observation for Titanium Alloy |
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| ZHANG Wang-feng,LI Xing-wu,MA Ji-min,CAO Chun-xiao,ZHU Zhi-shou.Effect of Microstructure on Damage Tolerance Properties and SEM in-situ Observation for Titanium Alloy[J].Journal of Aeronautical Materials,2006,26(3):313-314. |
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| Authors: | ZHANG Wang-feng LI Xing-wu MA Ji-min CAO Chun-xiao ZHU Zhi-shou |
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| Abstract: | The crack tip morphology,fatigue crack propagation rate and propagation path were investigated for TA15 titanium by SEM tension and SEM fatigue,and they were compared with macro mechanical properties.The results show that damage tolerance properties of lamellar are better than global and bi-model structure,because of crack tip blunting and crack branching or zig-zag path in the lamellar structure,i.e.fracture toughness is highest and fatigue crack propagation rate is the lowest in the lamellar structure. |
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| Keywords: | titanium alloy fracture toughness fatigue crack propagation rate in-situ observation |
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