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首页> 外文会议>Eighth International Fatigue Congress Vol.3, Jun 3-7, 2002, Stockholm, Sweden >TRANSVERSE FATIGUE PROPERTIES OF SIC FIBER REINFORCED TITANIUM MATRIX COMPOSITES
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TRANSVERSE FATIGUE PROPERTIES OF SIC FIBER REINFORCED TITANIUM MATRIX COMPOSITES

机译：SiC纤维增强钛基复合材料的横向疲劳性能

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摘要

Unidirectionally fiber reinforced titanium matrix composites (TMCs) have superior longitudinal (parallel to the fiber) mechanical properties compared to their monolithic counterparts. However, their transverse (normal to the fiber) mechanical properties are generally poor. To improve the transverse properties of TMCs, it is necessary to first evaluate the transverse properties precisely. In the present study, transverse fatigue properties of SiC fiber reinforced TMCs were investigated. SCS-6 SiC fiber reinforced Timetal834 alloy matrix composite was made by coated fiber technique with a magnetron sputtering apparatus. Fatigue tests were conducted under load control at room temperature and at 873 K. Transverse fatigue strength of the SCS-6/Timetal 834 composite was significantly lower than that of the unreinforced Timetal834 alloy at all fatigue cycles tested. Notably, the transverse fatigue strength at room temperature was nearly the same as that at 873 K. However, different cyclic stress-strain responses suggested different damage mechanisms.
机译：单向纤维增强钛基复合材料（TMC）与整体材料相比具有更好的纵向（与纤维平行）机械性能。但是，它们的横向（垂直于纤维）机械性能通常较差。为了改善TMC的横向性能，必须首先精确评估横向性能。在本研究中，研究了SiC纤维增强TMC的横向疲劳性能。用磁控溅射设备通过包覆纤维技术制备了SCS-6 SiC纤维增强的Timetal834合金基复合材料。在室温和873 K的负载控制下进行了疲劳测试。在所有测试的疲劳循环中，SCS-6 / Timetal 834复合材料的横向疲劳强度均显着低于未增强的Timetal834合金。值得注意的是，室温下的横向疲劳强度与873 K下的几乎相同。但是，不同的循环应力应变响应表明不同的损伤机理。

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