5348
Multiple thermal cycles in the α + γ phase region promote the formation of massive γ phases ( γm ) at the grain boundaries .
 process parameter: thermal cycles; concept or principle: phase; concept or principle: grain boundaries
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: thermal cycles, phase, grain boundaries 
Answer:
 process parameter: thermal cycles; concept or principle: phase; concept or principle: grain boundaries