5165
During AM , repeated heating and cooling during multi-layer deposition , local temperature gradient and solidification growth rate , deposit geometry , and molten pool shape and size govern the evolution of the grain structure .
 AM, heating, cooling, deposition, temperature gradient, solidification, geometry, molten pool, evolution, grain structure
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:
 AM, heating, cooling, deposition, temperature gradient, solidification, geometry, molten pool, evolution, grain structure