https://scholars.lib.ntu.edu.tw/handle/123456789/632973
標題: | Identification of prior β grains of additive manufactured Ti-6Al-4V alloy using electron backscatter diffraction | 作者: | Ni, Kai Ku, Ming Hsiang Tseng, Yu Jen HUNG-WEI YEN Wu, Ming Wei |
關鍵字: | Additive manufacturing | Electron backscatter diffraction | Microstructure | Parent phase reconstruction | Ti-6Al-4V | 公開日期: | 1-十月-2022 | 出版社: | ELSEVIER | 卷: | 324 | 來源出版物: | Materials Letters | 摘要: | Prior columnar β grains are an important microstructural feature of laser powder bed fusion (LPBF) Ti-based alloys and affect the properties. The objective of this study was to reconstruct the prior β grains of heat-treated LPBF Ti-6Al-4V alloy using crystallography data of α grains from electron backscatter diffraction. The reconstruction shows that the orientation relationship in β to α transformation is close to the Burgers orientation relationship but not rational. Besides, the results clearly confirm the orientation inheritance between the reversed β phase and the prior β phase. An accidental finding is that the α boundaries, having with misorientation ranges of 15°–56° and 67°–88°, are nearly identical to the high-angle grain boundaries of prior β phase. This can be a simple approach to identify high-angle grain boundaries of prior β phase when reconstruction algorithm cannot be obtained. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/632973 | ISSN: | 0167577X | DOI: | 10.1016/j.matlet.2022.132758 |
顯示於: | 材料科學與工程學系 |
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