In this study, a micromechanical finite element model is proposed based on experimental data and the rule of the mixture (RoM) in order to predict the tensile behavior of mechanical properties of heat-treated dual-phase medical-grade titanium (Ti–6Al–4V). Tensile tests, micro-hardness measurements, and RoM were used to obtain flow curves for the α and β phases. Scanning electron microscopy (SEM) imaging was used to determine phase fractions and to create representative volume elements (RVEs). Furthermore, the Gurson-Tvergaard-Needleman (GTN) damage model was calibrated using the Taguchi design of experiment (DOE) method in order to predict damage in the microstructure and the results were compared to fracture surface obtained using fractography in order to investigate failure mechanisms. The final micromechanical model could accurately predict stress-strain curves and showed that void formation and coalescence is the primary mechanism of failure. Finally, analyses ...

中文翻译：

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基于微观力学模型的热处理钛生物合金（Ti–6Al–4V）的损伤表征

在这项研究中，基于实验数据和混合规则（RoM）提出了微机械有限元模型，以预测热处理后的双相医用级钛（Ti–6Al– 4V）。拉伸试验，显微硬度测量和RoM用于获得α和β相的流动曲线。扫描电子显微镜（SEM）成像用于确定相分数并创建代表性的体积元素（RVE）。此外，使用Taguchi实验设计（DOE）方法校准了Gurson-Tvergaard-Needleman（GTN）损伤模型，以预测微观结构中的损伤，并将结果与​​使用fractography获得的断裂表面进行比较，以研究破坏机理。 。最终的微力学模型可以准确地预测应力-应变曲线，并表明空隙形成和聚结是破坏的主要机理。最后，分析...