87
Functionally graded metals fabricated using high-temperature additive manufacturing can form intermetallics that fracture during printing due to thermal stresses generated by the heat source .
 material: Functionally graded metals; concept or principle: fabricated; manufacturing process: additive manufacturing; material: intermetallics; concept or principle: fracture; machanical property: thermal stresses; concept or principle: heat source
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: Functionally graded metals, fabricated, additive manufacturing, intermetallics, fracture, thermal stresses, heat source 
Answer:
 material: Functionally graded metals; concept or principle: fabricated; manufacturing process: additive manufacturing; material: intermetallics; concept or principle: fracture; machanical property: thermal stresses; concept or principle: heat source