(TiBw+TiCp)/Ti复合材料的高温拉伸力学行为与失效机理

中国有色金属学报, 2016, 26(11): 2287-2295.

(TiBw+TiCp)/Ti复合材料的高温拉伸力学行为与失效机理

张长江 ^1, , 张树志 ^2, , 侯赵平 ^3, , 林鹏 ^4, , 孔凡涛 ^5, , 陈玉勇 ^6,

1.太原理工大学先进镁基材料山西省重点实验室,太原,030024

2.太原理工大学先进镁基材料山西省重点实验室,太原,030024

3.太原理工大学先进镁基材料山西省重点实验室,太原,030024

4.太原理工大学先进镁基材料山西省重点实验室,太原,030024

5.哈尔滨工业大学金属精密热加工国家级重点实验室,哈尔滨,150001

6.哈尔滨工业大学金属精密热加工国家级重点实验室,哈尔滨,150001

基金项目: 国家自然科学基金资助项目(51504163,51505323) Project(2014-ZD06) supported by the State Key Laboratory for Advanced Metal and Materials Foundation,China 北京科技大学新金属材料国家重点实验室基金(2014-ZD06)Project(51504163,51505323) supported by the National Nature Science Foundation of China

关键词：钛基复合材料 , 显微组织 , 高温拉伸性能 , 失效机理

Tensile mechanical behavior and failure mechanism of (TiBw+TiCp)/Ti composites at elevated temperature

Keywords： titanium matrix composite , microstructure , high temperature tensile property , failure mechanism

采用真空感应熔炼技术制备不同体积分数(TiBw+TiCp)/Ti复合材料,研究该系列复合材料在600～750℃高温拉伸力学行为.结果表明:(TiBw+TiCp)含量由0增加到7.5％(体积分数)时,(TiBw+TiCp)/Ti复合材料基体初始β晶粒和α片层得到显著细化;TiBw及TiCp的原位生成显著提高了基体合金的抗拉强度,并随(TiBw+TiCp)体积分数的增大而增大;随着拉伸温度升高,(TiBw+TiCp)/Ti复合材料抗拉强度降低而塑性增加,TiBw及TiCp对基体的强化作用主要源于细晶强化、载荷传递强化;(TiBw+TiCp)/Ti复合材料在600～700℃的断裂机制为TiBw和TiCp的断裂在750℃为增强相与基体间界面脱粘.

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