It is widely acknowledged that the blended elemental (BE) powder metallurgy (PM) Ti6Al4V alloy attracted unusual due to its low cost and comprehensive mechanical properties. However, the high porosity and mediocre mechanical properties of traditional vacuum sintering limited its application. To achieve better mechanical performance, the central composite designs (CCDs) method was employed to analyze the influence of sintering parameters, such as sintering temperature (St), heating rate (Hr), and holding time (Ht). The results indicated that St makes the most significant contribution to compressive strength and sintering density, accounting for 95.5% and 86.54% respectively. In addition, Ht makes the most significant contribution to compression ratio, which accounted for 89.35%. Through the analysis of response surface methodology (RSM), the optimum sintering parameters (St, Ht, Hr) could be considered to be 1300 °C, 148 min and 5 °C/min. In addition, verification experiments were carried out under the optimum conditions, and the experimental results were in good agreement with the predicted values, since the deviation of the predicted and experimental values was less than 4.9%. Therefore, the results of this study could certify the reliability of CCDs method, which would contribute to the development of titanium alloys with low cost and high mechanical properties.

中文翻译：

---

中央复合实验设计（CCD）-响应面法（RSM）优化Ti-6Al-4V合金的烧结工艺

众所周知，混合元素（BE）粉末冶金（PM）Ti6Al4V合金因其低成本和全面的机械性能而吸引了人们的注意。然而，传统真空烧结的高孔隙率和中等机械性能限制了其应用。为了获得更好的机械性能，采用了中心复合设计（CCD）方法来分析烧结参数的影响，例如烧结温度（St），加热速率（Hr）和保持时间（Ht）。结果表明，St对抗压强度和烧结密度的贡献最大，分别占95.5％和86.54％。另外，Ht对压缩率的贡献最大，占89.35％。通过分析响应面方法（RSM），最佳烧结参数（St，Ht，Hr）可以认为是1300°C，148 min和5°C / min。另外，在最佳条件下进行了验证实验，由于预测值与实验值的偏差小于4.9％，因此实验结果与预测值吻合良好。因此，这项研究的结果可以证明CCDs方法的可靠性，这将有助于低成本和高机械性能的钛合金的发展。因为预测值和实验值的偏差小于4.9％。因此，这项研究的结果可以证明CCDs方法的可靠性，这将有助于低成本和高机械性能的钛合金的发展。因为预测值和实验值的偏差小于4.9％。因此，这项研究的结果可以证明CCDs方法的可靠性，这将有助于低成本和高机械性能的钛合金的发展。