4401
In this study , the mechanical and electrochemical behaviors were investigated for equi-molar HEA ( AlCoCrFeNi ) obtained with selective electron beam melting ( SEBM ) .
 mechanical, electrochemical, selective electron beam melting, SEBM
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:
 mechanical, electrochemical, selective electron beam melting, SEBM