论文标题
基于原位同步加速器的高能量X射线衍射研究研究在商业纯钛中δ-氢化物的变形机理
In-situ synchrotron based high energy X-ray diffraction study of the deformation mechanism of δ-hydride in a commercially pure titanium
论文作者
论文摘要
我们使用原位高能量X射线衍射来消除2级商业纯钛的变形行为，该钛的氢气被充电形成氢化物。结果表明，衍射模式中的峰值扩大是由于由于相变引起的体积膨胀，在氢化物内和周围产生的高内部和相间应力引起的。氢化物表现出典型的高强度但脆性的次级行为，比基质进行弹性应变更多，并且是首先产生裂缝的位置。有趣的是，δHydrides比基质保持更大的菌株，尤其是在基质产生后。这项关于纯钛中氢化物变形机理的研究提供了见于钛和锆中氢化物变形行为和氢的含量。
We used by in-situ high energy X-ray diffraction to inestigate the deformation behavior of Grade 2 commercially pure titanium that was hydrogen charged to form hydrides. The results showed that the peak broadening in the diffraction patterns are due to the high internal and interphase stresses generated within and around hydrides due to the volume expansion induced by the phase transformation. The hydrides exhibit typical high strength but brittle secondary phase behavior, which undertakes more elastic strain than matrix and is the location where cracks are first generated. Interestingly, the δ-hydrides sustain larger strains than the matrix, especially after the matrix yields. This study on the deformation mechanism of hydrides in pure titanium provides insight into the hydride deformation behavior and hydrogen embrittlement in both titanium and zirconium.
