热处理过程中SiC_P/2024Al复合材料的热应力分析  

Thermal stress analysis of SiC_P/2024Al composites under different heat treatments

作　　者：韩媛媛[1] 武高辉[2] 李凤珍[3] 王秀芳[2] 章德铭[1] 耿洪滨[2] 

机构地区：[1]哈尔滨工业大学复合材料研究所,黑龙江哈尔滨150001 [2]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001 [3]哈尔滨理工大学材料科学与工程学院,黑龙江哈尔滨150080

出　　处：《材料科学与工艺》2004年第3期298-302,共5页Materials Science and Technology

摘　　要：为研究热处理过程中SiCP/2024Al复合材料的热应力的变化规律,及热处理工艺对SiCP/2024Al复合材料热残余应力的影响,利用Marc有限元软件对淬火和冷热循环热处理过程中的SiCP/2024Al复合材料的热应力进行了数值模拟.研究结果表明:热处理过程中,颗粒和基体的界面附近会产生很大的热应力场,并且在SiC颗粒的尖角处产生热应力集中;经淬火处理后的SiCP/2024Al复合材料的热残余应力与基体的屈服强度接近,但经过冷热循环处理后的SiCP/2024Al复合材料中的热残余应力明显降低.The varying principle of thermal stress in the SiC_P/2024Al composites under different heat treatments and the effect of heat treatment on the thermal residual stress are investigated. Thermal stress of SiC_P/2024Al composites under both water quenching treatment and thermal-cold cycling treatment are numerically simulated by Marc finite element software. The result of numerical simulation showed that a great thermal stress field exists near the particle-matrix interface under heat treatment and the stress concentration near the SiC particle corner is produced. The thermal residual stress of composites after water quenching treatment is near to the σ_bof the matrix; however, the thermal residual stress of composites after thermal-cold cycling treatment decreases evidently.

关 键 词：碳化硅颗粒 铝基复合材料 冷热循环处理 热残余应力 SiCq/2004Al 

分 类 号：TB331[一般工业技术—材料科学与工程] TG166.3[金属学及工艺—热处理]