Continuous grain boundary α (\( \alpha_{\text{GB}} \)) is often observed in age-hardened metastable β titanium alloys and plays a detrimental role in ductility. In this work, we show that the heating rate to the aging temperature is crucial in determining the extent of \( \alpha_{\text{GB}} \). The extent of \( \alpha_{\text{GB}} \) is determined by the extent of formation of isothermal ω at grain boundaries. This new finding is significant for suppressing continuous \( \alpha_{\text{GB}} \) formation in aging hardened β titanium alloys.

中文翻译：

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加热速率对亚稳态β钛合金中不连续晶界α形成的影响

在时效硬化的亚稳态β钛合金中经常观察到连续的晶界α（\（\（\ alpha _ {\ text {GB}} \）），并且在延展性方面起不利作用。在这项工作中，我们证明了加热速度到老化温度对于确定\（\ alpha _ {\ text {GB}} \）的程度至关重要。的程度\（\阿尔法_ {\ {GB}文本} \）通过形成等温的程度来确定ω在晶界处。这一新发现对于抑制时效硬化的β钛合金中连续\（\ alpha _ {\ text {GB}} \）的形成具有重要意义。