ABSTRACT In this study, the creep rupture time and creep properties of Ti43Al5V4Nb were evaluated at 1033 K (760°C), which was the designed maximum usage temperature for the material. A titanium–aluminium alloy with added V and Nb elements displayed higher elongation at a higher temperature than at lower temperatures. Almost all creep strain curves for Ti43Al5V4Nb consisted of tertiary stage creep. In this study, a numerical analysis method was adopted to investigate the creep properties. The creep strain curve was precisely determined using the θ-projection method when experimental data, until a life ratio of 0.9, were used to calculate the θ-parameters. The predicted creep rupture and creep strain occurrence times obtained using the θ-projection method showed good agreement with the experimental results.

中文翻译：

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使用 θ 投影法评估 Ti43Al5V4Nb 在 1033 K 下的蠕变变形和断裂时间

摘要 在这项研究中，Ti43Al5V4Nb 的蠕变断裂时间和蠕变性能在 1033 K (760°C) 下进行评估，这是该材料的设计最高使用温度。添加了 V 和 Nb 元素的钛铝合金在较高温度下比在较低温度下显示出更高的伸长率。Ti43Al5V4Nb 的几乎所有蠕变应变曲线都由第三阶段蠕变组成。在这项研究中，采用数值分析方法来研究蠕变特性。当使用 θ 投影法精确确定蠕变应变曲线时，使用实验数据，直到 0.9 的寿命比，用于计算 θ 参数。使用θ投影方法获得的预测蠕变断裂和蠕变应变发生时间与实验结果非常吻合。