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With positive verification of the strategy , the model was then experimentally validated to simulate two point-melt scan strategies during electron beam melting of IN718 , one intended to produce a columnar and one an equiaxed grain structure .
 verification, model, experimentally validated, point-melt, electron beam melting, IN718, equiaxed grain
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:
 verification, model, experimentally validated, point-melt, electron beam melting, IN718, equiaxed grain