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The uniform surface morphology , removal of partially melted particles , absence of pores and cracks , decrease in Sa , and moderate improvement in corrosion resistance suggests that LPEB irradiation can be used as a post-treatment for SLM-MS samples .
 surface morphology, melted, pores, corrosion resistance, irradiation, be, as, post-treatment, samples
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:
 surface morphology, melted, pores, corrosion resistance, irradiation, be, as, post-treatment, samples