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采用小冲杆试验方法对Ti-6Al-4V合金和原位生成体积分数为5%,10%的TiB与TiC颗粒混合增强Ti-6Al-4V基复合材料的力学性能进行了试验,采用有限元分析了试样厚度和摩擦因数等试验条件对试验结果的影响。结果表明:有限元模拟的载荷-位移曲线与小冲杆试验曲线的走向基本一致,试样承受的最大载荷对其厚度十分敏感;载荷-位移曲线对于试样的摩擦因数并不敏感;通过有限元模型中的参数计算的三种钛材料的断裂韧度J_(IC)和小冲杆试验总能量E_(sp)与等效断裂应变存在线性关系,并建立了相应的经验公式。
The mechanical properties of Ti-6Al-4V matrix composites reinforced by Ti-6Al-4V alloy and in-situ generation of Ti-6Al-4V matrix composites with 5% and 10% TiB and TiC particles were investigated by the small punch test method. The influence of test conditions such as specimen thickness and friction factor on the test results was analyzed. The results show that the load-displacement curve of the finite element simulation is in basically the same direction as that of the small-punch test curve. The maximum load on the specimen is very sensitive to the thickness. The load-displacement curve is not sensitive to the friction coefficient of the specimen. The fracture toughness J_ (IC) and the total energy E_ (sp) of the three kinds of titanium materials calculated by the parameters in the meta-model have a linear relationship with the equivalent fracture strain, and the corresponding empirical formula is established.