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Previous research on the powder bed fusion electron beam additive manufacturing of Inconel 718 has established a definite correlation between the processing conditions and the solidification microstructure of components .
 research, powder bed fusion electron beam additive manufacturing, Inconel 718, solidification microstructure, components
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 research, powder bed fusion electron beam additive manufacturing, Inconel 718, solidification microstructure, components