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Since the WAAM process is an inherently non-equilibrium thermal process , it is challenging to predicate and control the microstructural evolution , which is responsible for the variation of mechanical properties in the deposited part .
 manufacturing process: WAAM; concept or principle: process; concept or principle: process; concept or principle: microstructural evolution; concept or principle: variation; concept or principle: mechanical properties
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:
 manufacturing process: WAAM; concept or principle: process; concept or principle: process; concept or principle: microstructural evolution; concept or principle: variation; concept or principle: mechanical properties