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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Pore Size, Morphology and Orientation on the Bulk Stiffness of a Porous Ti35Nb4Sn Alloy
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Effect of Pore Size, Morphology and Orientation on the Bulk Stiffness of a Porous Ti35Nb4Sn Alloy

机译：孔径，形态和取向对多孔Ti35NB4SN合金体积刚度的影响

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摘要

The metal foams of a titanium alloy were designed to study porosity as well as pore size and shape independently. These were manufactured using a powder metallurgy/space-holder technique that allowed a fine control of the pore size and morphology; and then characterized and tested against well-established models to predict a relationship between porosity, pore size and shape, and bulk stiffness. Among the typically used correlations, existing power-law models were found to be the best fit for the prediction of macropore morphology against compressive elastic moduli, outperforming other models such as exponential, polynomial or binomial. Other traditional models such as linear ones required of updated coefficients to become relevant to metal porous sintered macrostructures. The new coefficients reported in this study contribute toward a design tool that allows the tailoring of mechanical properties through porosity macrostructure. The results show that, for the same porosity range, pore shape and orientation have a significant effect on mechanical performance and that they can be predicted. Conversely, pore size has only a mild impact on bulk stiffness.
机译：钛合金的金属泡沫设计用于独立研究孔隙率以及孔径和形状。这些是使用粉末冶金/空间架技术制造的，允许对孔径和形态进行精细控制;然后针对熟的模型表征和测试，以预测孔隙率，孔径和形状和体刚度之间的关系。在典型使用的相关性中，发现现有的幂律模型是最适合预测对压缩弹性模量的Macropore形态，优于诸如指数，多项式或二项式的其他模型。其他传统模型，如线性的模型需要更新的系数，以变得与金属多孔烧结宏观结构相关。本研究中报告的新系数有助于通过孔隙率宏观结构裁缝机械性能的设计工具。结果表明，对于相同的孔隙率范围，孔形状和取向对机械性能具有显着影响，并且它们可以预测。相反，孔径对散装刚度仅有轻微的影响。

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