| 富氧α层对钛合金直角接头开裂的影响 |
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| 引用本文： | 陈星,董志国,姜涛,刘含洋.富氧α层对钛合金直角接头开裂的影响[J].失效分析与预防,2011,6(3):178-181,198. |
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| 作者姓名： | 陈星 董志国 姜涛 刘含洋 |
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| 作者单位： | 1. 北京航空材料研究院,中国航空工业集团公司失效分析中心,试金石检测科技有限公司,北京100095
2. 中国航空工业集团公司沈阳发动机设计研究所,沈阳,110015 |
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| 摘 要： | 某液压系统进行地面开车试验约2h时发现钛合金直角接头喷油现象,后更换另一件直角接头继续工作约3h,在同样位置也发生开裂喷油现象.通过断口宏微观观察、能谱分析、金相检查和硬度测试,确定了直角接头的开裂性质和原因.结果表明:直角接头开裂性质为疲劳开裂；开裂原因主要与接头承受了较大应力和源区存在较厚的富氧α层有关；建议在彻底...
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| 关 键 词： | 钛合金 直角接头 富氧α层 疲劳开裂 |
Cracking of Titanium Alloy Right-angle Joint under Influence of Oxygen-rich a Layer |
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| CHEN Xing,DONG Zhi-guo,JIANG Tao,LIU Han-yang.Cracking of Titanium Alloy Right-angle Joint under Influence of Oxygen-rich a Layer[J].Failure Analysis and Prevention,2011,6(3):178-181,198. |
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| Authors: | CHEN Xing DONG Zhi-guo JIANG Tao LIU Han-yang |
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| Affiliation: | CHEN Xing1,DONG Zhi-guo2,JIANG Tao1,LIU Han-yang1(1.AVIC Failure Analysis Center,Beijing Institute of Aeronautical Materials,Touchstone Testing Innovation Cooperation,Beijing 100095,China,2.AVIC Shenyang Aeroengine Research Institute,Shenyang 110015,China) |
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| Abstract: | Titanium alloy right-angle joints in a hydraulic pressure system cracked during testing.In order to find out the cracking mode and cause,macro and micro observation on the fracture surface,energy spectrum analysis,metallurgical structure examination and hardness testing were carried out.The results show that the cracking mode is fatigue crack.The cracking is mainly related to the greater stress and the thicker oxygen-rich α layer.It is proposed that the oxygen-rich α layer be cleared and the structural margin be enlarged. |
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| Keywords: | titanium alloy right-angle joint oxygen-rich α layer fatigue cracking |
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