6591
In this study , EBM-fabricated Ti6Al4V prismatic bars , populated with rhombic dodecahedron unit cells of various sizes and relative densities , were subjected to four-point flexure tests .
 Ti6Al4V, prismatic, unit cells, relative densities, flexure tests
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:
 Ti6Al4V, prismatic, unit cells, relative densities, flexure tests