【摘要】 提出了钨合金的组织结构模型．在此基础上通过有限元法对钨合金拉伸变形时组织结构中的应力分布及其变化规律进行了计算机数值模拟研究．结果表明：钨合金拉伸变形时拉伸方向最大正应力和最大Mises应力区域在钨颗粒相中，同时钨颗粒还将受到垂直于拉伸方向的压应力；最大剪切应力分布在粘结相中，随拉伸变形增加，粘结相最先进入塑性状态；由于粘结相的塑性变形，钨合金中应力不断重组，应力逐渐在钨颗粒中集中．更多还原

【Abstract】 A microstructure model of tungsten heavy alloys has been developed. On the basis of the model, the micro-mechanical behavior of tungsten heavy alloys under tensile deformation has been analyzed by computer numerical simulation with finite element method (FEM).The results show that the maximum stress is in the tensile direction and the maximum Mises stress is in tungsten grains, and there is a compressive stress in them, which is perpendicular to the tensile direction. The maximum shear stress and the first plastic flow in tungsten heavy alloys take place in matrix under tensile deformation. As the tensile deformation increases, the stress concentrates onto tungsten grains.更多还原