7256
Theoretical analysis suggests that the difference in the thermal expansion coefficient between inoculants and IN718 did not provide a significant amount of residual stress .
 Theoretical, thermal expansion coefficient, IN718, residual stress
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:
 Theoretical, thermal expansion coefficient, IN718, residual stress