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The microstructure of Ti6Al4V made by SLM is often dominated by martensite due to rapid cooling , which can be decomposed to lamellar + structure during SLM process by tuning the processing variables .
 concept or principle: microstructure; material: Ti6Al4V; manufacturing process: SLM; material: martensite; manufacturing process: cooling; material: be; concept or principle: lamellar; concept or principle: structure; manufacturing process: SLM; concept or principle: process
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: microstructure; material: Ti6Al4V; manufacturing process: SLM; material: martensite; manufacturing process: cooling; material: be; concept or principle: lamellar; concept or principle: structure; manufacturing process: SLM; concept or principle: process