Microstructural characterization and comparison of Ti-6Al-4V manufactured with different additive manufacturing processes

被引：71

作者：

Neikter, M. ^{[1
]}

Akerfeldt, P. ^{[1
]}

Pederson, R. ^{[2
]}

Antti, M. -L. ^{[1
]}

Sandell, V. ^{[1
]}

机构：

[1] Lulea Univ Technol, Div Mat Sci, S-97181 Lulea, Sweden

[2] Univ West, Div Welding Technol, S-46132 Trollhattan, Sweden

来源：

MATERIALS CHARACTERIZATION | 2018年 / 143卷

关键词：

Additive manufacturing; Shaped metal deposition; Selective laser melting; Electron beam melting; Laser metal wire/powder deposition; Ti-6Al-4V; CRACK GROWTH-BEHAVIOR; MECHANICAL-PROPERTIES; LASER; TEXTURE; WIRE; DEPOSITION; EVOLUTION; FEATURES;

D O I：

10.1016/j.matchar.2018.02.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：68 / 75

页数：8

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