纤维增强金属基复合材料层板热/机械疲劳性能试验研究

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材料工程 ›› 2003, Vol. 0 ›› Issue (10) : 14-15,22.

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研究与应用

纤维增强金属基复合材料层板热/机械疲劳性能试验研究

刘绍伦¹, 何玉怀¹, 温井龙²

作者信息 +

Thermal-mechanical Fatigue Behavior of an Unidirectional Fiber-reinforced Metal-matrix Composite Laminates

LIU Shao-lun¹, HE Yu-huai¹, WUN Jing-long²

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文章历史 +

摘要

进行了B/Al层板250～350℃温度循环范围内的同相位、反相位的热/机械疲劳寿命试验以及250℃和350℃下的等温疲劳试验与宏微观分析研究。结果表明:同相位与反相位的热/机械疲劳S-N曲线出现相交,以交点做应力水平线FPF,在FPF以上,同相位的热/机械疲劳(TMF)比反相位的要短;而在FPF以下,同相位的TMF寿命比反相位的要长;无论是同相位,还是反相位的TMF寿命,均低于250℃和350℃下的等温疲劳寿命;疲劳裂纹起源于纤维与基体界面,并随着基体的横向开裂而扩展,但最终的疲劳损伤机理不仅取决于应力水平,还取决于试验环境条件;纤维与基体之间界面反应区在TMF的损伤扩展方面起了主要作用。

Abstract

In this paper, the experimental study and macro-micro analysis about the behavior of thermal-mechanical fatigue (TMF) were conducted in B/Al metal-matrix composite with thermal cycle of 250℃ to 350℃. The results showed that S-N curves of in-phase and out-phase intersect at the point of FPF, above which the life of in-phase TMF is less than that of out-of-phase TMF but the case is opposite below the point. Otherwise the life of TMF is always less than that of 250℃ isothermal and 350℃ isothermal. Furthermore,the fatigue crack come of the interface between fiber and matrix material because the interface reaction acts as the primary part of damage on TMF.

导出引用

刘绍伦, 何玉怀, 温井龙. 纤维增强金属基复合材料层板热/机械疲劳性能试验研究[J]. 材料工程, 2003, 0(10): 14-15,22

LIU Shao-lun, HE Yu-huai, WUN Jing-long. Thermal-mechanical Fatigue Behavior of an Unidirectional Fiber-reinforced Metal-matrix Composite Laminates[J]. Journal of Materials Engineering, 2003, 0(10): 14-15,22

中图分类号： TG113.25+5 TB333

参考文献

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