Testing And Analysis Of Macro-Micro Mechanical Properties Of Tungsten Alloy

In this paper, relations between the macro mechanical properties of the tungsten heavy alloy (WHA) and its micro structural characteristics were presented.It was tested that young's modulus, static yield strength and tensile strength of WHA and mechanical parameters of each phase including in the matrix phase and the tungsten phase, the W-W boundaries and W-matrix boundaries, and with the SEM, the micro structural of fracture was observed. The data of tests was dealt with BP Neural Networks and its results showed that BP Neural Networks was feasible to predict the trend of tensile strength of WHA with the change of the different shapes and volume fractions of W-phase.The hardening modulus of the matrix in plastic deformations was measured with MTS, and the macro-tensile strength of the tungsten alloys treated by different super-deforming technology was analyzed by using Eshelby method and Mori-Tanaka concept of 'average stress'. The fracture of the tungsten grains was supposed to be brittle. The results of analysis were comparable with the results of tests. The calculation with the finite element method simulating the different shapes of W-phase of 93 WHA also showed the same conclusions.