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In this work tensile specimens were successfully produced with optimal process parameters and mechanical tests of additively built samples indicate mechanical performance comparable with a 450 °C tempered state of conventionally cast material .
 tensile specimens, optimal process, mechanical tests, samples, mechanical, tempered, cast
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:
 tensile specimens, optimal process, mechanical tests, samples, mechanical, tempered, cast