Three‐dimensional α colony characterization and prior‐β grain reconstruction of a lamellar Ti–6Al–4V specimen using near‐field high‐energy X‐ray diffraction microscopy
Three‐dimensional α colony characterization and prior‐β grain reconstruction of a lamellar Ti–6Al–4V specimen using near‐field high‐energy X‐ray diffraction microscopy
复制标题
使用近场高能 X 射线衍射显微镜对层状 Ti-6Al-4V 样品进行三维 α 集落表征和先验 β 晶粒重建
DOI：
10.1107/s1600576715011139
复制
发表时间：
2015
影响因子：
6.1
通讯作者：
R. Suter
中科院分区：
文献类型：
--
作者：
Euan Wielewski;David B. Menasche;P. Callahan;R. Suter
用近场高能X射线衍射显微镜(nf-HEDM)对样品进行了表征
块体中六方密排α相的三维晶体取向场
具有片层(β-退火态)组织的Ti-6Al-4V试件。这些数据已经被
使用基于3-D方向错误的颗粒查找算法进行分割，提供了前所未有的
关于复杂的三维形态和空间取向偏差分布的信息
转化的α片状菌落。一种基于三维Burgers方向关系的洪水填充算法
已经实现了重建的形态和晶体取向的
高温体心立方(Bcc)Pre-β颗粒。这些数据的组合具有
用于了解之前-β的颗粒结构在
在变换后的α中观察到的特殊形态和空间取向偏差分布
菌落结构。希望这种认识可以用来发展转型
针对特定应用进行了优化的结构，并生产出更逼真的合成
用于模拟的微结构。
Near-field high energy X-ray diffraction microscopy (nf-HEDM) has been used to characterize
the 3-D crystallographic orientation field of the hexagonal close-packed (hcp) α phase in a bulk
Ti-6Al-4V specimen with a lamellar (β-annealed) microstructure. These data have been
segmented using a 3-D misorientation-based grain finding algorithm, providing unprecedented
information about the complex 3-D morphologies and spatial misorientation distributions of the
transformed α lamellae colonies. A 3-D Burgers orientation relationship-based flood fill algorithm
has been implemented to reconstruct the morphologies and crystallographic orientations of the
high temperature body centred cubic (bcc) prior-β grains. The combination of these data has
been used to gain understanding of the role of the prior-β grain structure on the formation of
specific morphologies and spatial misorientation distributions observed in the transformed α
colony structures. It is hoped that this understanding can be used to develop transformation
structures optimized for specific applications and to produce more physically realistic synthetic
microstructures for use in simulations.