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The microstructures of additively manufactured ( AM ) metal components have been shown to be heterogeneous and spatially variable when compared to conventionally manufactured counterparts .
 microstructures, additively manufactured, AM, metal, components, be, manufactured
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:
 microstructures, additively manufactured, AM, metal, components, be, manufactured