利用作者改进的等效夹杂理论定量研究了热残余应变对晶须增强金属基复合材料拉、压性能的影响，解释了非铸态复合材料拉、压性能存在差别的原因。对２０％ＳｉＣＷ／Ａｌ材料的拉、压性能和断口的ＳＥＭ观察表明，本文理论合理反映了晶须增强金属基复合材料的塑性强化规律，说明热残余应变是影响晶须增强金属基复合材料的重要因素，为该类材料的性能预报和优化设计提供了理论方法．
Residual thermal strain is an important factor which affects the behaviors of metal matrix composites. The modified equivalent inclusion theory is employed to investigate the influence of the residual thermal strain on the tension and compression behaviors of metal matrix composites quantitatively. The difference between the tension and compression behaviors of noncasting composites has been interpreted. Through the experiment about the tension and compression behaviors of 20% SiCw / Al and the observation of the fracture surface, it is proved that the theoretical model reflects the plastic principle of the whisker reinforced metal matrix composites and indicates the necessity of considering residual thermal strain. The theoretical model provides a method to estimate material behaviors and optimal design.
参考文献
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| [5] | EvansAG,HutchinsonJW,MeMeekingRM．ScrMetallMater,1991 |
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