6526
Noticeable amounts of anisotropy with respect to the build orientation , especially in tensile elongation , were observed in the direct tempered samples due to in-homogenous microstructure .
 anisotropy, build orientation, tensile elongation, tempered, samples, microstructure
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:
 anisotropy, build orientation, tensile elongation, tempered, samples, microstructure