Microstructural characterization and comparison of Ti-6Al-4V manufactured with different additive manufacturing processes
Microstructural characterization and comparison of Ti-6Al-4V manufactured with different additive manufacturing processes
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DOI：
10.1016/j.matchar.2018.02.003
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发表时间：
2018-09-01
影响因子：
4.7
通讯作者：
Sandell, V.
中科院分区：
文献类型：
--
作者：
Neikter, M.;Akerfeldt, P.;Sandell, V.
在这项工作中，对通过不同增材制造 (AM) 工艺制造的 Ti-6Al-4V 的微观结构进行了表征和比较。表征的微观结构特征是α板条厚度、晶界α(GB-α)厚度、先前β晶粒尺寸和α集落尺寸。此外，还测量并比较了显微硬度。成形金属沉积 (SMD) Ti-6Al-4V 材料的微观结构显示出 α 板条尺寸的最小变化，而采用激光金属线沉积-0 (LMwD-0) 制造的材料显示出最大的变化。发现与用定向能量沉积（DED）工艺制造的相应材料相比，用粉末床熔融（PBF）制造的材料的先前β晶粒尺寸更小。平行带仅在采用 DED 工艺制造的材料中观察到，而在采用 PBF 工艺制造的材料中不存在。
In this work, the microstructures of Ti-6Al-4V manufactured by different additive manufacturing (AM) processes have been characterized and compared. The microstructural features that were characterized are the alpha lath thickness, grain boundary alpha (GB-alpha) thickness, prior beta grain size and alpha colony size. In addition, the micro-hardnesses were also measured and compared. The microstructure of shaped metal deposited (SMD) Ti-6Al-4V material showed the smallest variations in alpha lath size, whereas the material manufactured with laser metal wire deposition-0 (LMwD-0) showed the largest variation. The prior beta grain size was found to be smaller in material manufactured with powder bed fusion (PBF) as compared with corresponding material manufactured with the directed energy deposition (DED) processes. Parallel bands were only observed in materials manufactured with DED processes while being non-present in material manufactured with PBF processes.