Prediction of the Elastic Properties of Polycrystalline Microcomponents by Numerical Homogenization

A study was conducted to predict the elastic properties of polycrystalline microcomponents by numerical homogenization. The microcomponents considered in the study were made of Stabilor®G, an alloy consisting of gold with a cubic crystal symmetry. The investigated microtensile specimens were produced by vacuum pressure diecasting with a muffle temperature of Tm=700°C. The finite element program ABAQUS was used to carry out simulations of uniaxial tensile tests on polycrystalline microspecimens made up of cubic single crystals. The model of the specimens were discretized by a regular mesh with 39000 linear hexahedral elements. The simulations showed a decreasing scatter band of Young's modulus with an increasing number of grains. The mean value and standard deviation of Young's modulus were investigated to understand its behavior in microspecimens.