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Parameters prediction of hot-pressing sintering of high entropy alloys using numerical modeling and simulation

机译：使用数值建模和模拟的高熵合金热压烧结的参数预测

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摘要

In this work, numerical modeling and simulation method was firstly used to obtain the hot-pressing sintering parameter of high entropy alloy (HEA). The finite element model was built to describe the consolidation process. Constitutive relation of powder material was applied assuming that metal powder is a kind of elasto-plastic material with an elliptical yield criterion. The change law of relative density for sintered bulk varying with pressure, time and temperature were obtained. Besides, the flow stress as well as relative density distributions were acknowledged with different sintering time. The simulation results indicate that the HEA would achieve a relative density of more than 95 % if the pressure above 45 MPa at 1150 °C. The relative density from experiment is well agreement with that of simulation results when the sintering parameter are within the predicted range. This work is of great importance to the study of hot-press sintering of HEA.
机译：在该工作中，首先使用数值建模和仿真方法来获得高熵合金（Hea）的热压烧结参数。建立有限元模型以描述整合过程。施加粉末材料的构成关系假设金属粉是一种具有椭圆形产量标准的弹性塑料材料。得到了用压力，时间和温度变化的烧结体积的相对密度的变化规律。此外，通过不同的烧结时间确认流量应力以及相对密度分布。仿真结果表明，如果1150℃高于45MPa的压力，则Hea的相对密度大于95％。当烧结参数在预测范围内时，来自实验的相对密度与模拟结果的相对密度很好。这项工作对于研究HEA的热压烧结研究非常重要。

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