| SiC维纤增强钛基复合材料的疲劳裂纹扩展速率 |
| |
| 引用本文： | 王海丽,杨延清,冯广海,罗 贤,张荣军,刘 斌.SiC维纤增强钛基复合材料的疲劳裂纹扩展速率[J].稀有金属材料与工程,2012,41(4):635-639. |
| |
| 作者姓名： | 王海丽 杨延清 冯广海 罗 贤 张荣军 刘 斌 |
| |
| 作者单位： | 西北工业大学凝固技术国家重点实验室,陕西西安,710072 |
| |
| 基金项目： | 国家自然科学基金(51071122)；凝固技术国家重点实验室自主课题(KP200906)；高等学校学科创新引智计划 (B08040) |
| |
| 摘 要： | 用箔-纤维-箔法制备SiC纤维增强Ti-6Al-4V复合材料,研究复合材料在加载频率f=10Hz、应力比R=0.1、最大应力σmax=300MPa条件下的疲劳裂纹扩展速率(da/dN),并采用扫描电子显微镜对疲劳破坏断口进行观察和分析。结果显示,在该加载条件下,复合材料第Ⅱ阶段疲劳裂纹扩展速率符合高斯函数。断口观察表明,复合材料的基体在裂纹稳态扩展区出现明显的疲劳条带,复合材料的疲劳损伤可以分为纤维断裂、基体开裂和纤维/基体界面脱粘等多种形式。
|
| 关 键 词： | 钛基复合材料 SiC纤维 疲劳裂纹 扩展速率 |
| 收稿时间： | 4/8/2011 12:00:00 AM |
Fatigue Crack Growth Rate in SiC Fiber Reinforced Titanium Matrix Composites |
| |
| Wang Haili,Yang Yanqing,Feng Guangh,Luo Xian,Zhang Rongjun and Liu Bin.Fatigue Crack Growth Rate in SiC Fiber Reinforced Titanium Matrix Composites[J].Rare Metal Materials and Engineering,2012,41(4):635-639. |
| |
| Authors: | Wang Haili Yang Yanqing Feng Guangh Luo Xian Zhang Rongjun and Liu Bin |
| |
| Affiliation: | (State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,China) |
| |
| Abstract: | SiC fiber reinforced Ti-6Al-4V composites(TMCs) was prepared by the foil-fiber-foil method.The fatigue crack growth rate of the TMCs was investigated under the condition of f=10 Hz,R=0.1 and σmax =300 MPa,and the fracture surface of TMCs was observed by scanning electron microscopy(SEM).Results show that the crack growth rate at the stage Ⅱ of crack propagation is well consistent with Gaussian function.SEM observation indicates that distinct fatigue striations exist in the stable propagation area of the fatigue crack of the Ti-6Al-4V matrix.The failure modes of TMCs include fiber breakage,matrix cracking,fiber/matrix interfacial debonding,et al under the loading condition. |
| |
| Keywords: | titanium matrix composite SiC fiber fatigue crack propagation rate |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《稀有金属材料与工程》浏览原始摘要信息 |
|
点击此处可从《稀有金属材料与工程》下载全文 |
|
