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This paper presents initial developments on a model for microstructure prediction in PBF-LB manufacturing of Ti-6Al-4V , primarily focused on solid-state phase transformation and dislocation density evolution .
 concept or principle: model; concept or principle: microstructure; manufacturing process: manufacturing; material: Ti-6Al-4V; concept or principle: solid-state phase; machanical property: dislocation density
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: 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:
 concept or principle: model; concept or principle: microstructure; manufacturing process: manufacturing; material: Ti-6Al-4V; concept or principle: solid-state phase; machanical property: dislocation density