5174
In addition to oxidation , the effects on impact energy due to hot isostatic pressing ( HIP ) , specimen orientation , and EBM process defects were also investigated .
 oxidation, impact, hot isostatic pressing, HIP, orientation, EBM, defects
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:
 oxidation, impact, hot isostatic pressing, HIP, orientation, EBM, defects