基于“随机法”构建了WC-Co硬质合金微观结构的二维参数化模型,使用移动窗口法确定了微观结构代表性体积单元的尺寸,通过有限元模拟拉伸实验计算了材料的弹性性能.该模型考虑了微观结构的拓扑参数,反映了微观结构中平均粒径、长径和短径、形心位置和取向角分布的随机性特征,并实现了Co相的体积分数的控制.结果表明,采用移动窗口法确定的代表性体积单元包含约120个晶粒;在拉伸实验中晶粒形状及其位置分布对各向异性的影响较小.弹性性能模拟结果和采用Golovchan模型计算及实验结果吻合较好,从而验证了该方法能够有效预测WC-Co硬质合金的弹性性能.
参考文献
| [1] | 肖逸锋,贺跃辉,丰平,谢宏,马自省,张丽娟,黄自谦,黄伯云.WC-Co梯度硬质合金的制备及渗碳对其组织的影响[J].材料热处理学报,2008(01):116-119,123. |
| [2] | Berg V D;Henk .Hardmetals:trends in development and application[J].Powder Metallurgy,2007,50(01):7-10. |
| [3] | 刘寿荣.WC-Co硬质合金的显微结构参数[J].材料热处理学报,2005(01):62-64. |
| [4] | Sadowski T;Nowicki T .Numerical investigation of local mechanical properties of WC/Co composite[J].Computational Materials Science,2008(1):235-241. |
| [5] | 刘玉佳,燕瑛,苏玲.双随机分布细观分析模型与复合材料性能预报[J].复合材料学报,2011(02):206-210. |
| [6] | Kim C S;Massa T R;Rohrer G S .Modeling the relationship between microstructural features and the strength of WC-Co composites[J].International Journal of Refractory Metals and Hard Materials,2006,24(1-2):89-100. |
| [7] | Armstrong R W .The hardness and strength properties of WC-Co composites[J].Materials,2011,4(07):1287-1308. |
| [8] | Zhi-Hui Xu;John Agren .A modified hardness model for WC-Co cemented carbides[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(1/2):262-268. |
| [9] | 任淮辉,李旭东.二维材料微结构设计与数值模拟软件系统[J].计算机辅助设计与图形学学报,2009(06):861-868. |
| [10] | V.T. Golovchan .On the thermal residual microstresses in WC-Co hard metals[J].International Journal of Refractory Metals & Hard Materials,2007(4):341-344. |
| [11] | Hashin Z;Shtrikman S .A variational approach to the theory of the elastic behaviour of multiphase materials[J].Journal of the Mechanics and Physics of Solids,1963,11(02):127-140. |
| [12] | Mori T;Tanaka K .Average stress in matrix and average elastic energy of materials with misfitting inclusions[J].Acta Metallurgica,1973,21(05):571-574. |
| [13] | Baxter SC.;Graham LL. .Characterization of random composites using moving-window technique[J].Journal of Engineering Mechanics,2000(4):389-397. |
| [14] | Sunghyuk P .Development of a microstructure-level finite element model for the prediction of tool failure by chipping in WC-Co systems[D].Illinois:The University of Illinois at Urbana-Champaign,2007. |
| [15] | Pelissou, C;Baccou, J;Monerie, Y;Perales, F .Determination of the size of the representative volume element for random quasi-brittle composites[J].International Journal of Solids and Structures,2009(14/15):2842-2855. |
| [16] | Vinh Phu Nguyen;Oriol Lloberas Valls;Martijn Stroeven;Lambertus Johannes Sluys .On the existence of representative volumes for softening quasi-brittle materials - A failure zone averaging scheme[J].Computer Methods in Applied Mechanics and Engineering,2010(45/48):3028-3038. |
| [17] | S. Graham;N. Yang .Representative volumes of materials based on microstructural statistics[J].Scripta materialia,2003(3):269-274. |
| [18] | I.M. Gitman;H. Askes;L.J. Sluys .Representative volume: Existence and size determination[J].Engineering Fracture Mechanics,2007(16):2518-2534. |
| [19] | 李安海,赵军,王泽明,郑伟.WC-Co硬质合金的弹性性能[J].硬质合金,2011(03):194-198. |
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