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.
出处
《材料科学与工艺》
EI
CAS
CSCD
2004年第3期298-302,共5页
Materials Science and Technology
