On the Deformation of Dendrites During Directional Solidification of a Nickel-Based Superalloy
On the Deformation of Dendrites During Directional Solidification of a Nickel-Based Superalloy
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DOI：
10.1007/s11661-019-05429-0
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发表时间：
2019-11-01
影响因子：
2.8
通讯作者：
Stone, H. J.
中科院分区：
文献类型：
--
作者：
Aveson, J. W.;Reinhart, G.;Stone, H. J.
同步加速器 X 射线成像已用于原位检查镍基高温合金凝固过程中发生的枝晶变形。通过结合吸收和衍射对比成像，可以根据变形事件的定位和持久性对变形事件进行分类。特别是，通过数字图像相关性阐明了温度梯度中的热收缩引起的变形机制。结论是，这种机制可以解释单晶铸件中通常观察到的微小取向错误。 (C) 作者 2019
Synchrotron X-ray imaging has been used to examine in situ the deformation of dendrites that takes place during the solidification of a nickel-based superalloy. By combining absorption and diffraction contrast imaging, deformation events could be classified by their localization and permanence. In particular, a deformation mechanism arising from thermal contraction in a temperature gradient was elucidated through digital image correlation. It was concluded that this mechanism may explain the small misorientations typically observed in single crystal castings. (C) The Author(s) 2019