1473
In addition , post-process heat treatment plays an important role in grain refinement , especially for WAAM-fabricated aluminum and Inconel alloy .
 concept or principle: post-process heat; process characterization: grain refinement; material: aluminum; material: Inconel alloy
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: 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:
 concept or principle: post-process heat; process characterization: grain refinement; material: aluminum; material: Inconel alloy