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To widen the applications of FeCoCrNi high-entropy alloys ( HEAs ) fabricated via selective laser melting , their mechanical properties must be improved , and annealing plays an important role in this regard .
 alloys, fabricated, selective laser melting, mechanical properties, be, annealing
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:
 alloys, fabricated, selective laser melting, mechanical properties, be, annealing