Revealing competitive columnar grain growth behavior and periodic microstructural banding in additively manufactured Ti-6Al-4 V parts by selective electron beam melting

Materialia ◽  
2019 ◽  
Vol 7 ◽  
pp. 100365 ◽  
Author(s):  
X.P. Tan ◽  
S. Chandra ◽  
Y. Kok ◽  
S.B. Tor ◽  
G. Seet ◽  
...  
Keyword(s):  
Electron Beam ◽  
Grain Growth ◽  
Electron Beam Melting ◽  
Growth Behavior ◽  
Selective Electron Beam Melting ◽  
Columnar Grain ◽  
Grain Growth Behavior

Grain growth behavior in a columnar-grain-structured silicon wafer for photovoltaic application

2014 ◽  
Vol 65 (2) ◽  
pp. 190-195
Author(s):  
Ye-Neug Lee ◽  
Jin-Seok Lee ◽  
Bo-Yun Jang ◽  
Joon-Soo Kim ◽  
Young-Soo Ahn ◽  
...  
Keyword(s):  
Grain Growth ◽  
Silicon Wafer ◽  
Growth Behavior ◽  
Photovoltaic Application ◽  
Columnar Grain ◽  
Grain Growth Behavior

scholarly journals Fabrication of Single Crystals through a µ-Helix Grain Selection Process during Electron Beam Metal Additive Manufacturing

Metals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 313 ◽  
Author(s):  
Martin R. Gotterbarm ◽  
Alexander M. Rausch ◽  
Carolin Körner
Keyword(s):  
Electron Beam ◽  
Additive Manufacturing ◽  
Single Crystals ◽  
Electron Beam Melting ◽  
Selection Process ◽  
Powder Bed ◽  
Grain Structures ◽  
Selective Electron Beam Melting ◽  
Columnar Grain ◽  
Metal Additive

Selective Electron Beam Melting (SEBM) is a powder bed-based additive manufacturing process for metals. As the electron beam can be moved inertia-free by electromagnetic lenses, the solidification conditions can be deliberately adjusted within the process. This enables control over the local solidification conditions. SEBM typically leads to columnar grain structures. Based on numerical simulation, we demonstrated how technical single crystals develop in IN718 by forcing the temperature gradient along a µ-Helix. The slope of the µ-Helix, i.e., the deviation of the thermal gradient from the build direction, determined the effectiveness of grain selection right up to single crystals.

scholarly journals Grain growth prediction in selective electron beam melting of Ti-6Al-4V with a cellular automaton method

2021 ◽  
Vol 199 ◽  
pp. 109410
Author(s):  
Feiyu Xiong ◽  
Chenyang Huang ◽  
Orion L. Kafka ◽  
Yanping Lian ◽  
Wentao Yan ◽  
...  
Keyword(s):  
Electron Beam ◽  
Cellular Automaton ◽  
Grain Growth ◽  
Electron Beam Melting ◽  
Growth Prediction ◽  
Selective Electron Beam Melting ◽  
Cellular Automaton Method

Assessing Porosity in Selective Electron Beam Melting Manufactured Ti–6Al–4V by Nonlinear Impact Modulation Spectroscopy

2020 ◽  
Vol 39 (4) ◽  
Author(s):  
Jan Kober ◽  
Alexander Kirchner ◽  
Alena Kruisova ◽  
Milan Chlada ◽  
Sigrun Hirsekorn ◽  
...  
Keyword(s):  
Electron Beam ◽  
Electron Beam Melting ◽  
Modulation Spectroscopy ◽  
Selective Electron Beam Melting
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